RBP Posted October 26, 2020 Report Share Posted October 26, 2020 Question about a strange TP valve discharge line. So this water heater has a TP discharge line that runs up and out of the house. On initial inspection, the inspector noted the potential for water to collect & corrode the valve as well as the potential for backflow into the water heater. Seller "corrected" the problem by having a plumber come out and install a 90 degree elbow with a drain at the upward turn. Is this legal/good practice? My understanding is the line should drain with gravity which to me means that it should go down & over the side of the WH, but this is at the back of a garage and there is no drain in the room to be able to take the overflow if it opens. What should be the best practice here and is the drain on an elbow really a proper fix for this? Quote Link to comment Share on other sites More sharing options...
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