toilet to urinal rough in

samlin7 · Aug 6, 2010

Hi Guys

I am looking to see if we can change the toilet we have now in a commercial church building into a urinal. The reason is because it is like a closet and men literally need to straddle the toilet to take a leak.

We are going to talk down some walls but there is still no way i can expand that room, we had volunteer achitects that recommended that we just make it an urinal.

How would I change the plumbing so that I make it into a urinal (is it 3" to a 2" pipe?) Anybody has experience with this? All I'm worried about is the drain pipe, supply line is easy for me to reroute.

Thanks

Jadnashua · Aug 6, 2010

Most modern urinals are wall-hung, so the drain line is probably the bigger issue. It will depend on how the pipe runs, and the wall construction (and maybe the floor as well). For a toilet, the code requirement is 15" either side of the center. Not sure about a urinal. You're grandfathered now, but if you change it, you have to meet current code. Probably best to look at the instructions on-line for one you may be interested in. While the requirements may be similar, they are not all identical.

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Shacko · Aug 6, 2010

If you have to comform to the ADA code this is what you need:

>>>Urinals.
Height. Urinals may be stall type extending to the floor or wall mounted. If wall
mounted, the rim of the urinal must be no more than 17 inches above the floor.
Clear Floor Space. A clear floor space 30 inches by 48 inches must be provided
for forward approach to the urinal and must be centered on the fixture. Privacy
shields which do not project beyond the front edge of the urinal may be provided
with 29 inches of clearance between them.<<<

Fubar411 · Aug 6, 2010

I recomment the floor to wall kind, so much more fun for the little ones.

Jadnashua · Aug 6, 2010

Both Kohler and American Standard make floor mounted urinals. Their drain is 8.5" from the wall. No idea what size. It appears that you'd need to install a trap underneath, as there's no room for one in the thing. They both list for over $1k, but are available for less. You may need a Flushometer valve, and you may not have a large enough water supply line to support it. A wall-hung would likely be less expensive, but a regular toilet would be even less.

Shacko · Aug 6, 2010

Fubar411 said:
I recomment the floor to wall kind, so much more fun for the little ones.

I don't know where you can still use one, those and exposed trap models were banned in all the areas I'm familiar with.

Dcelite · Aug 7, 2010

A wall hung urinal will take a 2" drain. If the existing toilet vent is directly behind the urinal you can cut in a 2" tapped san tee. After the wall is closed up, you install the urinal flange with a threaded nipple usually 1/4" off the finished wall. Put backing in the wall for the wall hung bracket.

samlin7 · Aug 8, 2010

I was looking into the urinal that goes to the floor, for the children, but in the end we decided to go with the wall mount.

I guess it doesn't look to hard to do, if there is a vent right there. If not, and If i need to tap off the toilet drain pipe, do i cut off the flange portion and use a no hub reducer?

Asktom · Aug 8, 2010

The 3/4" water supply for the flush valve may turn into a bigger issue than the drain.

rickmurray747 · Aug 9, 2010

I agree with Fubar. I worked on a Chicago plumbing project and had the same questions you did. You can't go wrong with a floor to wall urinal, especially for a church.

Thanks,
Rick McMurray
Quality Plumbing Contractors

JeffeVerde · Aug 10, 2010

shacko said:
I don't know where you can still use one, those and exposed trap models were banned in all the areas I'm familiar with.

What if you called it a "floor drain with wall-washing faucet"?

JeffeVerde · Aug 10, 2010

shacko said:
I don't know where you can still use one, those and exposed trap models were banned in all the areas I'm familiar with.

Have you got a code section on that, Shacko? American-Standard and Kohler still both sell floor units, and I'm sure I've seen new installs within the last couple years.

Personally, I really like the looks of the Kohler Steward S urinal - I'd even go so far as to call it sexy

. I'm trying to figure how I can rearrange things to put one in my bathroom. Maybe I can hang it in the shower lol

toilet to urinal rough in

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