On Tue, 16 Sep 2014 17:02:22 +0100, "Bob Hobden"
wrote:

"White Spirit" wrote

soup wrote:

My son has asked me to put a tap in to drain his trough (it is filled
with stones, plants sit on top of the stones and water).
Are there any 'kits' around to do this, has anyone done this using off
the shelf plumbing parts are there any 'gotchas' I have to look out for?

Where I intend to mount the tap (hadn't realised just how grotty the
Greenhouse had become).
http://postimg.org/image/s0p76dz4x/

The problem as I see it is that the wooden box is lined with polythene to
keep the water in. You need a tap that will connect to the membrane and seal
it whilst having a long enough thread to pass through the wood. Whilst I
don't know the thickness of the wood it looks like a normal outside tap
would not have a long enough length of thread with the necessary large
washers to stop leakage.

As he asked for std plumbing fittings he needs to ask at a plumbers
supplies for a bulkhead fitting like pictured here.
http://www.thepipefittings.com/bulkhead-fittings.html
in a size suitable for the thickness of the trough side and with a
thread for the tap he wishes to use
Other sources are online and ebay,and water garden centers who deal
with fish ponds for carp etc.
Personally I would get the Bulkhead fitting on ebay and use a water
butt tap sourced from wherever convenient.

G.Harman