I am about to plumb-in a new bathroom sink, and was wondering how I
should do the waste pipe. Should this have a u-bend in the same way as
the kitchen sink, or just a straight connection (well, with the odd bend
to allow it to connect to the waste stack - prob just 2 90 degree angles
As always, any advice happily received.
It'll need a trap of some sort, for the same reason as you have them
everywhere else, you don't want the smells from the sewers coming up
the plughole. The trap is normally fitted almost directly on to the
Does everyone call them sinks nowadays? To my mind a sink is in the
kitchen (or utility room, or outside) and the thing in the bathroom is
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John Stumbles wrote:
<br>> something like this ??<br>> <a
href="http://www.screwfix.com/app/sfd/cat/pro.jsp?ts )961&id709">http://www.screwfix.com/app/sfd/cat/pro.jsp?ts )961&id709</a>
<p>yup, but 32mm for basins (_not_ sinks </pedantic> :-)
Which Tyler: leader of the pedants' revolt.</blockquote>
<p><br>and 40mm for the kitchen sink ?? (need to do that now - after ripping
it out last night :) )
One of U - bend, bottle trap or hepworth valve is always required.
Otherwise you will get nasty niffs coming from the drains through your
If there is a danger that toilet flushing or bath draining will suck water
out of the basin's trap then fit anti-syphon version of the bottle trap or a
There is no such thing as a bathroom sink. Kitchens have
sinks, bathrooms have basins.
Yes, you shoud definitely fit some sort of trap. Various "U"
arrangements are available, compact (moulded in one with
an inlet/exit/inspection cap), but it sounds to me as if you
want a bottle trap, which can fit straight onto the basin
waste grille fitting, and does a 90 degree turn too. You
can even get a chrome one! These fittings are very neat
and unobtrusive. The bottom unscrews (like an upside-
down bottle lid) for inspection/cleaning.
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You must have some form of u-bend that retains water to stop smells from
the waste stack. But how did you think you were going to fit the pipe to
the waste without one? I don't think I've ever seen a straight threaded
coupling that would allow this.
*Hard work pays off in the future. Laziness pays off now *
Dave Plowman email@example.com London SW 12
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