Code requirement for custom shower drain?
Hello all, i'm a tile contractor looking at a custom walk in shower, the size of the shower pan is approx. 8.5 ft wide by 3.5 deep, with a showerhead on each side of the short walls
local plumber tells me you need (2) 2" pvc drains for this setup, HOWEVER because this is a handicapped accessible shower the customer has already lowered the subfloor under the shower area so that the finished mortar bed height is equal to the rest of the floor.....no curb, and wheelchair rolls right in
the lowered floor means some sistered joists, and this takes up the needed room for 2 drains.....sooo the plumber says we need (1) 3" drain instead
1) is this correct, i live in the st. louis mo area if that makes any difference
2) my real problem is that as the tile contractor i want to use a shower waterproofing system made by Schluter Systems called "KERDI" and they make their own drain to fit their waterproofing membrane, and it only comes in 1 size of course, the standard 2 inch....i don't know if there is a way to modify a standard 3" drain but maybe some of y'all might know about that??
Code Approved custom shower drains. ACO Kerdi
ACO makes a custom linear drain with a bondable surface flange that you can tie into with Kerdi or Kerdi DS. The linear drain can come with 1, 2 or 3 - 2" outlets if the need arises in the future.
You can see all the custom options you have. The flange on this ACO drain is designed so that products like Kerdi or Kerdi DS can be bonded to it with Schluter's Kerdi Fix. More detail here on ACO's web page.
Also if you entertain the idea of a hybrid system a Noble Flex Flashing from Noble Company can tie into any clamping drain and offer up a nice wide bondable surface to seam the Kerdi to. We recently used some Noble Deck and seamed some Kerdi DS to it for a custom trench install we did in Coquitlam.
Many ways to build these showers.
Schluter also makes a conversion drain I believe in the 3" size to convert many clamping drains into a Kerdi style drain.
So many options. JW