The trap has to be deep enough to allow the stem up to the shower drain only. Could be as little as 6 inches I suppose. it wants to be high enough that the run-out from the trap is at the very least as high but preferably a little higher than the point where it enters the rest of the plumbing. You will need more depth if you are installing a flush level fixture, the sort without a step up into the shower pan.
You may also want to run a vent up to join the stack in the attic space particularly if the bath or shower are further up stream from the rest of the fixtures. This will also depend on the location of any other vent. ----- Original Message ----- From: Shane Hecker To: [email protected] Sent: Thursday, July 09, 2009 10:40 PM Subject: [BlindHandyMan] plumbing question I've got a bathroom which has a sink and toilet. We're ading a shower and tub unit. What are the steps to install the drainage? The building is on a concrete slab, so I know concrete wil need to be broken up. How deep in the concrete does the p-trap need to be? Shane [Non-text portions of this message have been removed]
