Installing a Utility Sink

Old 05-27-01, 11:19 PM
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I am installing a utility sink in our laundry room/garage. Because of the layout. I need to locate the sink 10 feet away from the pipes for the washer. My plan was to install some 1/2" copper pipe tees on the hot and cold lines and running the pipes to the sink with shut-off valves on the end of the pipes, connecting the sink with some flexible hoses (the same kind used on the washing machine), then running the 1-1/2 PVC drain from the sink to the 2" drain pipe for the washing machine using a wye fitting. I was planning to simply run the piping (copper and drain) along the wall supporting it with straps and 2 by 4's; my questions are:
Does the drain pipe require a slope? Is it 1/4" per foot?
How far apart should I support the PVC and copper pipes?
Is some kind of cushion material requred between the pipes and the straps?
Is a Wye fitting right or should I have used a Sanitary Tee?
Any other tips? I would appreciate it!
Old 05-27-01, 11:42 PM
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I'm not a pro plumber, but yes, you need to slope the drain at least 1/4" per linear foot.
You didn't mention a trap under the utility sink, but you need one of those, too, and I would add an autovent in the drain line after the trap.
You can't use washing machine hoses to connect to the sink and cut-off valves on the water supply. There are flexible hoses that come in different lengths made for the purpose, however, that will work.
The copper and PVC lines should be O.K. if you clamp them about every 4'. Just use clamps made for the purpose (they don't need any cushion material).
I think that the wye fitting will be o.k.
You can go to "Build/Remodel" and "Repair/Fix-It" above, and to and follow the links in the Plumbing sections for illustrated how-to info that should help you.
You should be able to find everything in the Plumbing section of a big box store.
Good Luck!
Old 05-29-01, 09:41 PM
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Installing a Utility Sink

Thanks for the info, and the reference to the BH&G site! I was planning on installing the sink with a P trap. Didn't think about venting though.
Does the auto vent need to be installed on a Tee so it is above the sink? Or will it automatically stop the waste water from flowing out of the top? Sure hope Lowes or Home Depot has it.
One thing I did not mention is that the 10 feet is actually two 5 feet runs with a 90 degree turn. Is there some rule for supporting or not supporting pipe at an elbow?
Old 05-29-01, 10:13 PM
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Yes use an autovent which looks like this put it up as high as you can get it above the bottom of the sink line, here is a couple of configurations to go by.

Support every 4' feet.
Old 05-29-01, 10:25 PM
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Plumber2000- Thanks for the picture of the auto vent, and the tip on how high to install it! I will probably go with set up 1 in your e-mail.

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