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Author:
ddbbp (KS)
I needed to disconnect a dishwasher.
It has braided steel supply lines and a 90 hose type connection which connects to the blue plastic dishwasher inlet on one end and the compression supply line on the other.
The previous person used Teflon tape on the supply line (the supply line has plastic compression) and they did not use anything on the hose type connection which had a rubber washer inside of it.
When I re-made the connection I removed the Teflon tape on the supply line and did not use anything on that thinking its unneeded since its compression.
On the plastic inlet to brass hose type connection with rubber washer I just put a little bit of rectoseal tplus 2 on the threads. Hand tight and then snugged it up a bit with my channel locks.
Is no Teflon on one side and a bit of dope on the other OK?
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Author:
hj (AZ)
If it is the typical DW connection supply line, NOTHING is needed on either end, although if done correctly, it does not cause a problem if they are used.
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Author:
ddbbp (KS)
Its the 3/4" gardenhose side that connect directly to the dishwasher I am wondering about.... was it bad to use a little dope there since the seal is made by the rubber washer?
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Author:
North Carolina Plumber (NC)
As long as the pipe dope is safe for plastics it will be fine. It's only benefit was to lubricate the threads. It serves no purpose as for as making a watertight connection.
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Author:
hj (AZ)
ONly if that dope causes the rubber to rot and deteriorate.
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Author:
ddbbp (KS)
Thanks. I used Retroseal T plus 2 and I believe that stuff states its ok for plastic.
That ultimately was my concern, I suppose that means all plastic and not just schedule 40.
What type of plastic do you reckon that 3/4" blue inlet on the DW is?
Edited 2 times.
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Author:
North Carolina Plumber (NC)
HDPE ?
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Author:
KCRoto (MO)
I don't recommend using dope on any connection leading into a shower head, filter, or solenoid valve. If you want to lubricate the threads/washer then use silicone plumber's grease. If the dope gets inside the line, it can travel to another location where it can affect other components such as causing a valve to not seal, or clog inlet screens.
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Author:
ddbbp (KS)
Do you think I made a serious mistake then since you say its going to foul up the solenoid valve?
If anyone is familiar with the product I used too, I sure would appreciate some feedback.
thank you.
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Author:
KCRoto (MO)
With careful and judicious application, there shouldn't be any issues; if it was put on in excess and sloppily, then the chance for problems goes up much higher. If you just used it on the male threads, and kept it from the inside and off the surface where the rubber meets the plastic, it should be just fine. I have used the same product for years and my only real beef with it is that the applicator brush isn't really made for a product which is that thick. I think if it had stiffer and thicker bristles, it wouldn't make so many clumps and globs, but that is just my opinion. I think the T+2 stuff works well.
Edited 1 times.
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Author:
ddbbp (KS)
Thanks.
FWIW I didn't slobber it on as if I was making up a large metal joint.... just a bit on the threads.
I do see on the can it says its safe for plastic. I have used it plenty with pvc too. But I am unclear what the nipple on the dishwasher is made of.... poly something or another, or abs etc...
Typical foul up for me with plumbing, I think I am doing something beneficial but then realize I take two steps back with my actions.
At this point, would you go to the trouble of crawling around on the floor under a DW to take this joint apart, wipe off the dope and remake it?
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Author:
steve (CA)
I would just leave it alone.
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Author:
KCRoto (MO)
I would leave it alone now as well. What's done is done, and there may not be an issue regardless.
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Author:
bernabeu (SC)
Don't worry, be happy.
Have a quick look-see in 6 months out of paranoia.
==============================================
"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638
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