Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating

Why does this fitting have an arrow? 👀 Inside this spring-loaded check valve, a disc, seat and spring control which way water can flow. Enough forward pressure lifts the disc. When that pressure difference falls, the spring returns it to its seat. Reverse pressure helps hold it shut. No handle. No electricity. Just pressure and a spring. Have you fitted one, or wondered what was inside? #Plumbing #CheckValve #PlumbingApprentice #PipeAndSkill

Why would a valve deliberately release water? 💧 An RPZ valve uses two check valves and a pressure-operated relief valve to help protect the drinking-water supply from backflow. The clever bit is what happens in the chamber between those checks. Have you fitted or tested one? #Plumbing #RPZValve #PlumbingApprentice

Which part of a radiator heats up first? 👀🔥 You turn the heating on, but where does the warmth actually start? Watch this radiator through the TOPDON TC004 Mini. The heat appears at the bottom-left connection, travels up the side and across the top, then gradually spreads down through the panel. The middle warms last, reaching 58°C by the end. Around 19 minutes of warming up, squeezed into a minute — with the interesting changes slowed down so you can follow them. For the money, this little thermal camera is hard to beat. Seeing the temperature pattern gives you a different view of what’s happening. A really useful bit of kit I reckon everyone should have one not just plumbers Remember, thermal imaging shows surface temperature, not the water inside. The colour scale adjusts as the radiator warms up, so keep an eye on the temperature readings too. Would you have guessed that heating pattern? Let me know 👇 Bought with my own money I’m not sponsored. I earn commission if you buy through the product link. #Radiator #ThermalImaging #Plumbing #TOPDON #CentralHeating