I believe pressure stat not a problem.
Press stat was supplied by ECS, after replacement machine worked without any problems.
Pulsing problem started much later.
Non return valve fitted in correct way, as if you fit the order way pump would be working all the time (filling up)
They have sent me two valves one bigger and one smaller I can try to fit another one.
Just was getting problems to sort out reducer, adapters because they supplied just random non return valves.
I’m located in London SE2 0LQ.
Thank you
