Prevent external pipe from freezing?

Sorry,forgot to say in previous post.I would try to keep the pipe above ground when you can see it,you don't know whats going on underground,
Make sure you waterproof it and make sure the wind can't blow on it i.e. box it in.

Glen
October 2009

I once had to run 2 heating pipes outside for about a metre along a wall before it went back into the building.We wrapped it with fibreglass wrapping and then boxed it in with wood and finally water proofed the whole lot with roofing felt.That was 15 years ago ,I have worked at the same premises many times since then never been any problems.

Glen
October 2009