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Question DetailsAsked on 1/3/2016

everytime i use water from kitchen the drain in garage over flows

theres hot water tank, bladder tank plus over flow for air con.that appear to have pvc pipes goin into drain that is over flowing

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1 Answer


Here is a prior answer to essentially the same issue -

Unless the hot water heater is actively draining into the drain because of a stuck overtemp/overpressure relief valve (so water gushing down the pipe on the outside of the tank to the drain) or a major hole in hnot water tank gushing water, that list of items would have no effect on the drain.

Your issue is undoubtedly a partially plugged sewer line, at a point downflow from the garage drain so when kitchen water is used it hit the clog and back up to the lowest elevation open drain - the garage floor drain in your case - so almost certianly in the in-ground portion of the sewer line. That is commonly the blockage point - where the sewer line changes from vertical in the house to near-horizontal under the house.

My recommendation - have it cleared out by a Sewer and Drain Cleaning contractor, and my recommendation if it has not been routed clean in the past 10 years, have it (unless clay tile or heavily corroded cast iron pipe) routed out full-diameter all the way to the street while he is there - probably about twice the cost but likely to eliminate the need for callbacks after a snaking. Water jeting with a sewer jetting tool is OK, but in my opinion - ONLY if it has a camera and light, so you can see as it is pulled whether or not the entire pipe has been cleaned properly or not - otherwise you are likely to have a lot of skips and misses.

The problem with snaking is it can worm a hole through a blockage to temporarily alleviate it, but does not eliminate the grease and soap scum and fiber buildup that reduces the inside diameter of the pipe and leads to clogging and backups, so snaking commonly results in another blockage another place in the pipe in short order (sometimes within hours) if the existing gunk is not cleared out every 10-15 years in a typical house - less often in houses using a lot of hot water (lots of hot showers or clothes washer use), more often in ones that use the garbage disposal to dispose of garbage (not what it is for) or put a lot of grease into the system.

Answered 3 years ago by LCD

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