wanting to set up a couple of small bilge pumps with associated pipe, ball valve, skin fittings and pipe tangs. I have sorted out the sizing of this via previous post on this. As the skin fittings will be about 2 feet above the waterline I am only looking at cheap fittings. Some I have been looking at are Tonval but there is a note to say that they should not be used in conjunction with ball valves or strainers. Is this just a particularly responsible retailer reminding buyers about the potential for losing your boat if the skin fitting fails or is there some other issue relating to fiting ball valves to these skin fittings?
thanks as always.