Valve that pumps to overboard could be closed ,is it a ball valve (handle on side may have slipped and is not turning the valve proper.If a gate valve internal disc could be disconnected fron spindle in closed position.
Also Y valve could be blocked when in overboard position.
10-20-2013 01:49 PM
Hi I have a problem with my jabsco marine toilet When I try to flush it ends up building up to much pressure and the bowl fills back up with water etc If I pump it into the holding tank it doesn't happen??