Blocked Urinal Waste Pipe

[Tony73]

Hello

I recently did a job in a 2 bowl auto flushing urinal system in a small commercial unit. The waste pipe was blocked solid with urine crystal/congealed stuff. I had to cut the pipe to get access and the replaced the waste pipe and S bends. All worked well with the urinals coping with the flush and everything draining away fine.


today I got a call that the urinals were overflowing when the cistern flushed down. The pipe is blocked again after 2 weeks. There is a WC that feeds into the same waste stack as the Urinals.


Can anyone suggest why this might be blocked again so quickly and what my best course of action is before I go back to sort out.

Any help greatfully recieved as I'm a Urinal novice just trying to help a mate out.

 

[jase158]

Had a call few weeks ago, customer wanted Sani flow fixed, I described I could take a look but sounded as though motor had gone.

They asked how much new one would be, when I told him he said he would call back, never heard nothing again.

Soooo dissapointed (not)

 

[Dannypipe]

I don't offer repairs to sani flows generally but.....the last one I fixed had a blown PCB. I changed it (no poo, clean job) and it worked fine. PCB was about £40 I think. I looked at it as I had fitted it a few years earlier.

I always try to fit isolation valves to the macerator output. So you don't get a nasty backwash. Sometimes you can fit a full bore 22mm ballfix, sometimes you will need to fit a waste iso' valve. Anyone who's plumbed in a swimming pool with be familiar with those.

Means you can isolate the macerator, and simply fit another one without getting covered in yeeeerch!

 

[tamz]

I used to do work in a small hotel where someone, in their wisdom, had fitted saniflows to 8 of the 10 rooms.
I got fed up stripping them and in the end told them to get someone else.

 

[Dannypipe]

Fitting them must be a last resort, and the costomer should be advised that one day it will fail....

 

[fuzzy]

Hello

I recently did a job in a 2 bowl auto flushing urinal system in a small commercial unit. The waste pipe was blocked solid with urine crystal/congealed stuff. I had to cut the pipe to get access and the replaced the waste pipe and S bends. All worked well with the urinals coping with the flush and everything draining away fine.


today I got a call that the urinals were overflowing when the cistern flushed down. The pipe is blocked again after 2 weeks. There is a WC that feeds into the same waste stack as the Urinals.


Can anyone suggest why this might be blocked again so quickly and what my best course of action is before I go back to sort out.

Any help greatfully recieved as I'm a Urinal novice just trying to help a mate out.

what is the fall on the waste? sounds like its leaving the producets behind