Yes Alan, bought boat 2 years ago, don't know history of pump, was cheap and easy to change PRV first, then when this didn't work i thought that it could only be the pump, and as for fitting a new remote electric PRV it was quicker and easier to fit new pump, if not cheeper. Any way thanks for your advice,as far as I'm concerned we ask for advice and follow the best solution to remedy the problem, i always appreciate all answers to my questions, I'm sorry if I've offended Whatever but we all take advice and make decision to act on it or not.