Recently I’ve had an issue with my water regulator. Probably time to replace just making sure I’m fixing the right issue. I have a manual valve hooked up to my main water housing connection in the cockpit. From there I have a quick disconnect to the dock hose. Recently Ive have noticed when I turn the valve on ( when I return back to the boat) to pressurize the water system, sometimes I hear a strong flow and sometimes I don’t. Sometimes I hear a hard flow and then a thunk, to which I have little to zero water pressure through the system. Sometimes it happens and sometimes it doesn’t. No issue with the dock water pressure. I’ve tested it. I’ve also had to install my own check valve in the system because the dock water was inadvertently filling up my off shore water tank. It was an easy fix instead of searching for the check valve within the system. Now I’m reading that the regulator acts as a check valve as well. Can anyone verify that? Any info would help. If it is time to replace the regulator, that’s an easy fix I just don’t know what type, if it matters and also the psi which it allows to go through the system.