Deep Seal P-Trap
Deep Seal P-Trap
(OP)
Hi,
Is there a standard for the depth of a P-trap?
Why is there a depp seal trop, is there a shallow trap also.
I am looking to find the depth of the SS line just after the floor drain. How can this be done? It depends on the geopetry of the P-trap, is that correct?
Please advice.
Is there a standard for the depth of a P-trap?
Why is there a depp seal trop, is there a shallow trap also.
I am looking to find the depth of the SS line just after the floor drain. How can this be done? It depends on the geopetry of the P-trap, is that correct?
Please advice.





RE: Deep Seal P-Trap
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Deep Seal P-Trap
I was hoping for an advice rather than a question!
RE: Deep Seal P-Trap
f) Trap Seal. Each trap shall have a water seal of 2 inches except where a deeper seal is required to prevent the loss of the trap seal by evaporation. Where loss of the trap seal may occur due to evaporation, one of the following shall be used:
1) Vegetable oil may be added to the trap.
2) A deeper seal not to exceed 8 inches may be used.
3) An automatic trap primer may be used.
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RE: Deep Seal P-Trap
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Deep Seal P-Trap
So it is a fair question in my opinion.
Normal p traps maintain a 2" water seal and typically the code only allows 24" max above the water to the top of the drain.
But do look at the code. In Ohio, where the IPC is used, deep seal traps are no longer allowed to maintain trap seal. Use of vegetable oil is no longer allowed - although it probably goes on after construction is over. A trap primer is what we have to design - which usually gets disconnected and the maintenance people either pour water in the drain occasionally or use the vegetable oil.
RE: Deep Seal P-Trap
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Deep Seal P-Trap