Are S traps same as P traps?
#1
04-18-07, 11:03 AM
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Are S traps same as P traps?
I want to raise up a bathtub's P trap to between the floor joists, but obviously the following DWV must be just below the floor joists. If I raise up the trap, then add two elbows to lower the line down to the straight DWV run, then the result would effectively be an S trap. Would this still work? I don't see why not, but I may be missing something.
You can assume the p trap that exists is properly vented and resultantly the vent would come after the created S trap.
You can assume the p trap that exists is properly vented and resultantly the vent would come after the created S trap.
#3
04-18-07, 02:00 PM
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The S trap they showed is a one piece trap. The traps you would find under a sink now(new install) are in 3 different pieces. They should be legal in your area. Check with your local inspector. A P trap is also showed on that page. A p-trap is in 2 different pieces, with nothing else joining it, which is legal.
#4
04-18-07, 04:28 PM
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So curious what is hang up on one piece models? Difficult to clean out?
Yeah I don't see what the issue is with S trap-- once it makes it to the apex of the second peak it falls down to the main run, rather than falling away at the gradual slope taht would be at the exit of the "P".
Yeah I don't see what the issue is with S trap-- once it makes it to the apex of the second peak it falls down to the main run, rather than falling away at the gradual slope taht would be at the exit of the "P".
#7
04-18-07, 10:12 PM
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I have a vent right at the outlet of the S trap so I think I'm going to go for it.
Should be analogous to the exit of a kitchen sink P trap heading into the wall with a wye to a vent right there in the wall.
Should be analogous to the exit of a kitchen sink P trap heading into the wall with a wye to a vent right there in the wall.
#10
04-21-07, 09:18 AM
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S-traps
S-traps drain too fast, this is the reason that they are not permitted under most codes, they drain so good that there is not enough water left to make the seal. A vent near the trap just increases this suction. Still your call.
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"If all else fails, read the directions"
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"If all else fails, read the directions"
