Toryboy1
New member
I have fitted a Johnson submersable pump to my boat. It should produce a reasonable flow at 6 ft head which I need because of the depth of my bilge. The discharge pipe rises vertically from the pump for a couple of feet then at a slope to the apex of its run just before it descends a foot or so to the through-hull fitting just above the waterline. As far as I can tell, there are no low spots, though it is difficult to see the pipe for all of its length. The problem is that there is clearly some problem with the set-up as the pump seems to work but is not forcing the bilge water up the pipe to the discharge.As far as I can tell, the pump is not blocked, tested by blowing down it, though this is hard. There is some considerable resitance. Would a low sport in the pipe run prevent the pump from discharging? Any other ideas?