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What is the water perisher in a 4 inch pipe that is five feet tall?
This is a plumbing question. Plumbers use a 4" pipe, that is 5' tall, and capped off to check the wast water lines before hooking up to the surer lines on new buildings. I know it has to hold for at least five days without any drop in the psi before it can pass inspection, in Washington State. I think that it is 5 pis, but I can't remember.
2 Answers
- BombaLv 71 decade agoFavorite Answer
The gage pressure of a five foot water column is 2.2 psig. The drain pipe testing would have to be done before any sinks, tubs, toilets are connected because pressure testing would blow out the P-trap seals. The test would be needed for drains installed below the ground floor slab and before the slab is poured. The test pressure of 5 psig seems a bit low, but it is well above any pressure the single floor plumbing drain system will experience in service.
- gatorbaitLv 71 decade ago
Hydrostatic pressure is 0.4333 psi per foot of water head, which in your case would give 5 x 0.4333 =
2.17 psig
