Will twisting a trap cause toilet water to clog my shower?
Twisting a trap or rotating fittings to save a necessary incline can cause your pipes to become blocked over time. Even if you use a dry siphon, toilet water might eventually back up and clog down your shower pipes. Correcting this critical mistake later usually requires completely redoing the room plan.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1putting the tee in the vertical pipeDid this help you?
- 2maintaining enough grade on both the shower and toilet sideDid this help you?
- 3Twisting or rotating the plumbing trap to force the standard fittings to bridge the gap.Did this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“Now I am having second thoughts that water from toilet might clog down my shower pipes. Is that a critical mistake? I really can't afford loosing any incline”source ↗
“I am using dry siphon so that shouldn't be a problem, I am just scared my pipes will get blocked as time goes on.”source ↗
“I really hope so, otherwise I would have to redo basically the whole room plan”source ↗
“I got a 45 degree fitting…to hit the exact angle I’d need like a 75? Other wise i twisted the trap to make it work.”source ↗
Where this came up
People with this problem also raised
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- 14How to connect a sink drain to existing glued PVC pipes
- 29How to figure out confusing plumbing and water flow directions
- 2What size pipe do I need when combining two 3-inch pipes?
- 5Will a standard P-trap fit with a 5" vertical clearance?