Just wondering if anyone has had a similar problem. The pressure valve on the water inlet was stuffed, no water pressure at all. After replacing the valve all was good for about 6 months. Now I have another problem, every now and then there is no water at all. It appears there is a back pressure and the only way to fix it is disconnect the hose and reconnect it again. Then its all good for a while.
On our Heritage there is a one way valve where the mains hose fits onto the van which stops the water coming out when you free camp with the pump turned on. This was sticking which stopped mains pressure. I thought it was the pressure regulator a first then found this little inline valve causing the problem. Replaced the valve and all is ok. ( apart from having purchased a new reg valve)