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 slow draining urinal
Author: Mjr10824

I'm working on a urinal at a bar that drains very slowly. Sizzle cleaned out the trap very nicely, but without any improvements I pulled the urinal and ran my 1/4 cable electic hand snake about 20' with little to no resistance. I hooked the urinal back up, throtled the water down a bit and tested. It improved enough where operation is acceptable, but I feel It will only be a matter of time before I'm called back. Does anyone have any advice or options as to what can be done? Peering into the pipe after I pulled the urinal I could see it is coated with urinary sediment, which is where I feel the problem lays. Is it possible or is there a product that can clean this salty material out? Thanks a lot. Construction plumber here with minimal service experience.

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 Re: slow draining urinal
Author: tnoisaw (MT)

I always used a screw driver to chip the gunk out. Gross job but usually does it. The carrier sometimes gets gunked up too so may take the same steps.

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 Re: slow draining urinal
Author: pro2002 (KS)

I would use a bigger cable, such as 5/8 and a new bit as this should be a 2" line. soak the urinal in muratic acid.After you cable the line pour more muratic acid or sizzle down the drain.Let it soak and then flush with water. Be carefull if this is a copper line,

Pro 2006

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 Re: slow draining urinal
Author: hj (AZ)

With the urinal off the wall, a closet auger is usually small enough and long enough to clear the vertical pipe.

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 Re: slow draining urinal
Author: e-plumber (NY)

I would skip the chemicals and snake the drain line, I'd go with a 3/8" cable with a nice size head to cut through and break up that disgusting, stinking urinal drain line gunk that we all love to hate. Flush it with hot water while the urinal is off of the wall.


"The society which scorns excellence in Plumbing as a humble activity and tolerates shoddiness in philosophy because it is an
exalted activity will have neither good Plumbing nor good philosophy: neither its pipes nor its theories will hold water." -
John William Gardner 10/8/1912 - 2/16/2002

Repair your leaking Plumbing fixtures ASAP [www.theplumber.com]
This slow drip will waste 7+ gallons of water per day.

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 Slow draining urinal
Author: Wheelchair (IL)

Urine salts is the culprit. People don't flush urinals after use and after a couple of minutes the salt in the urine begins to seperate and settle in the trap, then hardens. Over a period of time the buildup causes a slow drain. Overflow and throttle
can complicate the problem too.

The buildup has to be removed from inside the urinal. The trap must be clean and restored to its original opening. Iron pipe line must be cleared, flushed and cleaned.

Now you know the reason bars throw ice into the urinal. The ice melts with each use and dilutes the urine before it enters the main.

Throttle does not help the situation. It may make matters worse. Hercules- Calsi-solve is the choice of chemicals for the professionals.

Consider on adding an auto flush to ensure that the urinal is completely rinsed after each use. It will control both odor and trap restriction.

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