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?



I have a LOT of water to clear. Glove should give some idea of scale,
stones scraped out of the way to try to illustrate just how much water
is in this thing.
http://postimg.org/image/q8g7gfu7l/



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



Consider using a short length of threaded tube such as an in line malleable
iron pipe connector. With a threaded flat flange and plenty of plumbers goo
on either side. You can then screw any standard tap to the outside thread.

Mike