I used Conbraco's from Hamilton Marine, which are like the Apollo's from West Marine. I also put one on the anchor locker thru-hull, and while I was at it, put a siphon-break elbow on the intake side of the head (between the pump and the bowl, but hidden up in the locker with the outlet elbow). Of course, had to epoxy down some backing blocks to raise the seacock and distribute loads. I used the existing bronze thru-hulls; just spun off the barbed fittings, installed the blocks, spun on the seacock, installed the barb, put a screw to hold the seacock from turning, and replaced the hoses.
