"Doctor D." wrote in message
...
I am currently installing a vanity unit sink to replace a pedestal sink in
our en suite.

I have connected the waste to the existing 32mm stub using a pushfit to
solvent weld connector and a new bottle trap via a 90 degree pushfit bend.

The water runs from the sink very slowly indeed. I have held the garden
hose
running flat out over the waste pipe below the bottle trap and it copes
with
the flow, as did the previous sink. I am wondering if the new sink for
some
reason can't suck air back quickly enough to drain the sink at a
reasonable
speed. I have plugged the sink and brim filled it and the overflow
operates
very slowly. (it is possible to overfill the sink with both overflow and
plug hole open!)

I can hear glugging as the water drains, and the water can be heard
trickling down the vertical drop below the bottle trap moving very slowly.
I
have tried swapping the bottle trap for a P trap but this made no
difference.

Has anyone any ideas on this please. I was wondering if anyone markets a
vented trap to allow air to be sucked in - but I suspect this would let
water and smells out!

Thanks.



http://www.plumbers.org.uk/safe/safe_water.html


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