[Robin Craig]

Just a couple of quick comments more.

I will never pour concrete now without taing the time to put radiant heating pipes in the floor and the insulation associated with it ever again. That is one you can not recover from. In floor heat is magic in my book.

The other comment is of a more fluid nature.

If you live with the confines of a large city and don't have a septic system this wont be of much interest to you.

Our workshop at work has it's own septic system and drainage, the pipework is a bit more complex and longer than we would like. We experience some problems a while ago and as a result determined that too much solid waste in the grey water was coming from the big wash up sink in the shop. There are a number of us who use it and we are all saints all the time.

So we put some efforts into finding a way to capture that material.

The answer is this clever device. Made by Liquid Assets in the US of A and called the Gleco Trap it replaces the traditional P trap under a sink with a removable reservoir and a drain valve.

The valve on the side allows you to drain the column of water above the reservoir before you remove the jug. We bought it mail order from in Canada and it was from memory about $120 inc postage of there abouts.

We have found that silicone grease is good at making it seal properly after a clean out which we do monthly. Our problems have stopped an no one has to own up.