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Can I redirect the pipe on a pressure release valve on a water heater through an out side wall

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I replaced the pressure valve and was wondering if i can redirect the drain pipe on the pressure release valve on my water heater through the garage wall so it will drip out into the garden if it shoule ever go bad?
asked in Plumbing by eddie-sanchez (130 points)
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1 Answer

+1 vote

Hi Eddie, 

It depends on several conditions. The main requirements for the TPRV discharge pipe are listed at this link - http://checkthishouse.com/16/water-heater-tpr-safety-valve.html 

However, your local jurisdiction requirements could prohibit exterior installation, if you experience freezing temperatures in your area, exterior TPRV discharge wouldn't be a good idea as weel. 

Another issue is actual leakage of the valve which may not be noticable if you re-route this tubing to exterior. Leaking TPR valve may sometimes seal itself and stop responding as a safety device. In such case, without you even knowing about it, the valve could become a serious hazard.

answered by darekrudy (21,730 points)