Hello to all!
My wife and I just purchased a new dishwasher. After I installed it and ran
it for the first time, there was a fairly significant water leak where the
drain hose connects to the dishwasher drain port. I used the old black
rubber hose that was in place for the old dishwasher. Maybe that was
mistake number one. The new dishwasher came with its own white,
plastic, corrugated drain pipe--which I am planning on installing this
time in an attempt to correct the water leak. Should I put some sort of
pipe sealant around this connection, or just try it again without any
pipe sealant? Are there any stipulations on how the drain pipe should be
positioned? I realize that there shouldn't be any kinks in the drain pipe.
Also, have any of you guys ever experienced any minor leaks where the
90 degree elbow fitting screws into the bottom of the dishwasher? If so,
did you ultimately have to use pipe sealant to stop the leak 100%? I
tightened the fitting really well, and had wrapped the fitting's threads
times with 1/2" wide teflon tape before screwing it into the bottom of the
Thanks in advance for any tips on eliminating these two leaks! Man I hate
chasing down water leaks of any type!!! :-)
I did that job myself, and it was just a metal clamp that kept the drain
hose connected to the garbage disposal. I guess if you don't have a
disposal, that makes a difference.
Don't think I've ever used "pipe sealant" that your talking about, but if
that is some kind of glue, you might end up having to cut it off to replace.
That doesn't sound attractive.
Sorry I wasn't more help.
Thanks to all of you guys for the helpful information. After doing some
research yesterday, I indeed found out what Joe is alluding to above. Teflon
tape is DEFINITELY a lubricant and not a sealant. And of course my leak
experience had already demonstrated that, again, just like Joe said. I
probably should have contacted a plumber up front before installing it with
the teflon tape. Ahhhh..... The price of an education. ;-)
Once again guys, thanks for taking the time to respond with very helpful
Just installed a new dishwasher this weekend whose connection threads
were quite rough. The first time I hooked it up, it leaked profusely
despite being quite snug -- pulled the 90 out and looked in the hole and
it had simply bottomed out against a burr, it wasn't really properly
tight. After chasing the threads with a tap it went together easily and
didn't leak a drop.
firstname.lastname@example.org is Joshua Putnam
If I may add my $.02: I always use the plastic drain
hoses that ship with the machines. I was hesitant to
do this when they first started using the stuff, but it's
proven very reliable, and pretty much kink-proof,
which can't be said for rubber hoses.
You want to be sure to form a high loop in the drain
hose before drooping back down to the drain's branch
tee or disposal fitting. I usually just cable-tie the hose
to one of the sink clamps, as high as possible up under
the countertop. Our local code doesn't require an air
No sealant's required on the drain connection, but without
a high loop (or air gap if your code requires one), you risk
sink greywater getting into the DW - and that's not pretty!
On the inlet threads, I always uses teflon tape, then brush
on some pipe thread sealer over it. Never had one leak in
the many years I've done them that way.
Hope that's of some help.
Dave's Repair Service
New Albany, PA
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I had a hell of a time stopping the leak. I suspect that the threads in
the valve or the elbow were screwed up but they looked OK. I used the
Teflon tap; Teflon filled pipe dope. Still leaked a drop or two.
I finally had enough and used some silicone RTV (clear) on the joint and let
it "cure" overnight. No leak!
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