HELP - bath waste problem

[pt44]

I've convinced the client to let me run the bath waste around the wall, behind a boxed in skirting board. This will give me ample drop. I can then go down through the floor and connect to the existing pipe next to where it connects to the stack.

The current basin waste, I will improve and go over the existing notches. This won't give me much drop over the 1mt run, but should be at least 10mm, which is FAR, FAR better than it was.

After fully removing the floor today, I discovered the wonders of the previous "professional" plumbing job. The bath waste goes upwards to the other end of the room - only just up - but still up (not down!). Once it right angles and heads for the stack, they have connected to the old pipe with a compression fitting, which is where the whole pipe sags. This therefore sags and gives a nice uphill run (again) for the water to try and make its way to the stack (which incredibly they've actually managed to run downwards (must have been a different plumber).

All in all, the most hilarious installation I have come across. Oh, I forgot to mention that even the short run for the basin waste was angled downwards away from where it should have been flowing. God only knows how this installation managed to get rid of water. Sheer luck. The pipes were still full of residual water - as there was simply no way it could drain away.

Thanks for all the help chaps.

Paul

[justlead1]

Hi. You may well be right. How ever the design of singe stack soil and waste systems is based on waste pipes never running full, allowing air above the flowing water at all times. This design protects the trap on the sanitary fitting from siphoning and allowing foul air into the accommodation. Good luck

[Kings]

Originally Posted by justlead1

it's against the grain. But even Kings abdicate some times. Good Luck

Hope you're not talking about me!