Thank you for your reply. No it does not have an accumulator. It is a Flowjet 4406 series "Quad ll Diaphragm", the coach is a Tropical 2008 by National. Hope this info will help.
When I use the water pump in the MH when dry camping, it has started to surge, never used to do this.
Has anyone have an idea why this is happening & how can I solve the problem?
Thank you Don