I'm planning on installing a washer/dryer in a small room in my house. It's
all set up in terms of h/c water spigots, dryer vent, and appropriate
electrical supply. I need help on washer waste water disposal. There is a
clack PVC waste water pipe available, located about 4" off the floor, currently
plugged with a threaded nut. I think it is either 2" or 2 1/2" in diameter. I
don't think there is a P-trap yet on the line. Is there some standard way to
install an appropriate drain? I assume I should bring the pipe up off the
floor with some vertical 2" PVC black pipe, install a P-trap, and then just
leave a vertical section of pipe open, into which I place the washer discharge
nozzle. It will sit against the sheetrock, appear unfinished and sloppy, but
will be hidden by the washer. Short of ripping up the sheetrock and putting the
pipes between the studs (an option I'd rather not consider, to say nothing of
the 1/2" plywood shear wall under the sheetrock), how would a professional
<< how would a professional install this? >>
From an utterly logical standpoint, ask one. From what you have described the
performance of your drain could be dubious at best for the washer discharge.
You likely need a lower level p- or s-trap and above all connection to a proper
vent. Getting this done by a competent plumber can save you a bunch of problems
later and won't be as much of a budget buster as you think. HTH
In our case, there's a trap where that pipe goes into the
main septic pipe: does yours have one where it meets the
main pipe, city or septic, whichever it is? If so, no trap
I just added a vertical piece of pipe, about three feet,
maybe a little longer.
Then stop by the local hardware store and get an air
relief valve for a washer waste pipe; they're cheap, and can
be taken apart to clean if needed. Never had to in over ten
years, so dunno if ours would still come apart, but ... <g>
You MUST have that relief valve, OR a vent pipe that goes
up thru the ceiling and out above the roof - is it already
there maybe? If you don't have either of those, you WILL
end up siphoning water out of your washing machine, and
after the first empty, you'll be washing without water at
times. Frustrating to find out after the fact. If you
don't already have that stand pipe, then the relief valve is
the thing to use - it just lets air into the drain pipe so
it won't try to siphon your washer. It should be within 3
feet of the washer.
Someone will probably tell you they can leak, which I
suppose is possible, but never had it happen here. It's
just a one-way valve that lets air in but is checked so
nothing can come out in case any pressure builds up in it.
So, no air from inside the pipe ever gets into the room.
And, the valves are less than $10 last I noticed.
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