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Caleffi 309 Temperature and Pressure Relief Valve

Brand: Caleffi
HCO Code: 14A07
Price: £39.59
Ex VAT: £32.99
Stock: In Stock
Qty:  
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Q: We have a caleffi 309 valve on our ecocyl tank - does this in any way valve control the temperature in the tank? Our water is very hot, and I have tried turning down the the dial on the upper immersion element, but it seems to make no difference.

A: No. It is a safety device that draws off water if the temperature or pressure is too high. The top immersion heater is only for boost. You will need to turn down the bottom one as well.
Q: Hello We have a Caleffi 309 Temperature and pressure relief valve fitted to a Dimplex water cylinder. It has a constant drip (1 drip per second). Could it be debris and if so how do I remove it? or does it need replacing. Fitted March 2013. Regards Ian

A: It is unlikely to be debris, check the pressure and temperature are not being exceeded. If they are not, then it will need replacing.

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Temperature and pressure relief valve.

For hydraulic systems to protect the hot water storage.

 

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