Neatest one I ever saw was on a DeFever at Annapolis. Square design in steel coming up through the hull, about 6" on a side. Had a flange on top, with about a 3/4" thick piece of Lexan bolted down to it. The various thru-hulls were attached to the sides. The top was above the waterline, so if something clogged a thru-hull (they were the clamshell strainer types) you could just unbolt the cover and reach in and clear it. I'd certainly design one of these into any new boat I'd build. I also saw one similar made of a piece of SS pipe, maybe 6" in diameter, but everything had to be welded into place and the curvature had to be dealt with. Seemed like a lot of pain just to accommodate a round seachest. -- __________________ Keith Every instructor assumes you have nothing to do but study for his course.