I'm getting ready to tear out my old garage slab and have it replaced. I would eventually like to move my washer and dryer to the garage due to limited space in the house. My question is can I install pvc pipe for a sleeve when I pour the footings to allow for future plumbing and drain needs? If so what size of pipe should I use and is pvc ok to use in the concrete? Thanks for any help!
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Plumbing question for new concrete
- Thread starter KustomZ
- Start date
If local codes allow, schedule 40 PVC would work fine IMO. I'd put in a 3 or 4 inch sleeve for the drain and 2 inch for the water line. If you will have enough space and want to go to the extra effort, adding a john to your shop can be handy too.
sharage71
Well-known member
I made two sleeve of 4 inch Sch 40. I had about 10 inches sticking out through the crete and 90'd underneath the form and trenched out about 3', capped it, then backfilled it for future use. I didn't plan on plumbing this year. You can always fill the void with expandable foam when you plumb.
only line be in the concrete are the drain, a 2 inch for sink, 3 inch for toliet and you can block out the toilet. If you want a shower, a two inch. p trap on shower, sweeping 90 on toliet. sweeping 90 on sink. we are talking like three hours to plumb it the right way and be done with it. water supply comes in the wall
ixlr8
Well-known member
I would love to have a drain in my garage I am building... but I was told that Maine state law prohibits them. Better check on what your state/town/county allows.
Ezzie
Well-known member
pour the concrete about 1/4 inch over top of drain and once you get the final inspection, knock the concrete out, you have drain
That's exactly how I did it!! Roughed in the toilet, shower and sink connections the same way. Didn't want to deal with the hassle of getting permits for a bathroom and kitchenette in the shop. I'll open them up when the time comes to finish off rooms.
I'm not putting in a floor drain. The only plumbing I will have is a drain and water supply for a washing machine and possibly a sink. The garage is close enough to the house that I'm not going to put in a toilet. Water supply and drain will have to come in from outside and looks like the best way is through the footing, but that will come at a later time. Sounds like a sleeve will work just fine. Thanks!
tcianci
Well-known member
While a sleeve will work for the supply and drain, what is the reason you cant just rough in the drain and pour around it. I just built a pool house for a customer and it has a half bath. The drain for the toilet was roughed where it needed to be and fitted with a standard plastic sleeve designed for toilets in concrete floors. The drain for the sink was roughed so that it came up in the exterior wall. You will more than likely want to rough your drains and waterlines so that they come up into the wall, then you can stub out for the sink and the washing machine drains and continue the vent for those drains up the wall and out the roof.