I am in the process of fitting the fuel lines within my Skybolt and would welcome any advice on the type and location of the fuel drain/ sample valve. I've looked in the Aircraft Spruce catalogue and there is a big choice of screw-in valves. Is the valve screwedinto a piece of threaded tube, and the other end of the tube connectedvia a flexible pipe up to the fuel tank? I'm interested to know what you've done, how it works, and whether you would recommend anything else from your experience. Many thanks. Gary Edited by: Gary