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Re: overflowing drain pipe
It is ok to use a stand pipe that is 1 1/2 inch. the problem is that you need a new plumber!!! really you need someone that has a drain cleaning machine and can cut through all the years of lint and debris that has built up inside the pipe. they will use the same type of head that is used to cut out tree roots from drains. make sure they know what they are doing before you agree to pay them, most good companies will charge about 50-75 bucks to clean the drain out. also try the unit before the plumber leaves to make sure the drain is clean and doesnt back up.
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30 degrees or 30 inches. The drain stand pipe is separate from the washer and usual plumbed in behind the washer. You bring the the drain hose up to the top of the standpipe and then push the end (forming an upside down U at this point) into the top of the open 2-3" diameter PVC pipe and secure it so that it won't back out (but do not seal the opening). Nylon ties or hose clamps will work. The height requirement is so that the bottom of the hose in the standpipe is above the water level in the washer - this avoids the drain siphoning the water out of the washer. Check how far into the standpipe the drain hose has been pushed. If it is below the level of the water in the washer, back it out. Check the height of the standpipe. Many washer manuals recommend a 34" standpipe (max height of 48") based on the drain hose length on the down side of the U. Also make sure no one sealed the top of the standpipe against air entering the pipe. (Often this is done because of a back up in the drain, pull the drain hose out and get the pipe cleaned out and then put the hose in to the proper distance. Then leave the top of the standpipe open.)
Usually there is a clog or restriction in the stand pipe(drain pipe) causing water to not drain away.....Suggest drain-O products. If you have a very long drain or the stand pipe is not above the water level in the tub you will want some type of air gap to prevent siphoning.(siphon break kit)
The water is syphoning out the drain hose.
Many times when the stand pipe is backing up someone will seal the washer drain hose to the pipe to avoid overflow of the stand pipe.
This causes the water to syphon from the washer.
Or the opening for the stand pipe is just big enough to put the drain hose in and is to tight causing the syphon.
Putting the drain hose to far down the pipe can cause a syphon also.
You have a clog in one of your lines that connects to the standpipe whether it be in that pipe or another one that is close to it. You may want to check the air gap either on the side of the house or rooftop and snake that out. The standpipe itself is generally 2" in width and 48" in length. to have a plumber out you are looking at about $200.00. Did you try to google "why would my standpipe overflow?" Just a thought. I am sorry I was not any help, good luck!
Yes, it should. The only way water can enter a washer when off, is through a stuck inlet valve, or by siphoning water from a drain hose installed too deeply in the stand pipe. If your machine had enough water coming in to overflow, that definitely sounds like a bad inlet valve.
check to see how much drain line is in the stand pipe in the wall. there should only be about a foot of drain hose in the pipe any more that that will cause a syphon efect that will suck out any water that goes in. also, the stand piper in the wall bhind washer must be as tall as the washer itself.
Is your drain pump constantly running? If it isn't, check the standpipe (drain pipe) and make sure you don't have your drain hose shoved down in the pipe too far or the top sealed off. The stand pipe needs an air gap to properly drain, or it can siphon water from the wash tub. Symptom: Washer continually tries to fill or slow fills, but water won't stay in wash tub. Double check your drain line to be sure. It could be a simple fix.