Hi, I have a mysterious problem I have been banging my head against for the last year. I hope somebody might be able to make a suggestion as to what the problem is.
In my upstairs bathroom I have a toilet, a shower, a bath and a sink. Looking from the outside I can see that the toilet has its own waste pipe, and that there is only one other waste pipe. Presumably therefore the bath, shower and sink wastes are connected before going through the wall. The small waste pipe feeds into the toilet waste pipe some ten inches down the wall on the outside.
The bath and the shower drain very well with no problems. The sink on the other hand drains painfully slowly.
To investigate the sink drainage I have:
+ Repeatedly plunged the sink. This can make the water in the sink while plunging drain out quickly, but the problem returns with the next sink full.
+ Poured down all manner of caustic chemicals. This makes no difference.
+ Dismantled the U-bend – which was completely free from sludge, and allowed me to look through the plug hole clearly at the floor below.
+ With the U-bend removed I have run a hose down the waste pipe on full for several minutes and the water has disappeared quickly with no backlog at all (so I can only assume the pipe is clear).
Strangely the problem seems worse if you have just flushed the toilet, but I cannot see how this could be.
The sink would seem to defy gravity. Any ideas? Thanks!
Ken.
In my upstairs bathroom I have a toilet, a shower, a bath and a sink. Looking from the outside I can see that the toilet has its own waste pipe, and that there is only one other waste pipe. Presumably therefore the bath, shower and sink wastes are connected before going through the wall. The small waste pipe feeds into the toilet waste pipe some ten inches down the wall on the outside.
The bath and the shower drain very well with no problems. The sink on the other hand drains painfully slowly.
To investigate the sink drainage I have:
+ Repeatedly plunged the sink. This can make the water in the sink while plunging drain out quickly, but the problem returns with the next sink full.
+ Poured down all manner of caustic chemicals. This makes no difference.
+ Dismantled the U-bend – which was completely free from sludge, and allowed me to look through the plug hole clearly at the floor below.
+ With the U-bend removed I have run a hose down the waste pipe on full for several minutes and the water has disappeared quickly with no backlog at all (so I can only assume the pipe is clear).
Strangely the problem seems worse if you have just flushed the toilet, but I cannot see how this could be.
The sink would seem to defy gravity. Any ideas? Thanks!
Ken.