I have an external, Whale water pump on my Triton. Just arrived at our campsite connected everything up, and I seem to have a water problem. The pump seems to be continuously running and pressurising and blowing water out around the water plug/socket. I have changed the diaphragm and non return valve but still happening. It is a new pump, do I need to do anything to set the system up to stop this happening? At the moment the water system is unusable. Thanks in advance for any advice