Water flow issues

[All Summer Long II]

I have a 2001 Maxum 3500 SCR. Recently, when hook up to dock water, I seem to have a flow problem. When the faucets are initially turned on, there is no/little flow. After a minute water starts to flow.

I checked dock pressure and the regulator, both are fine. Is there a water filter somewhere that maybe clogged or something?

When using the water on the boat, with the pump, water flows fine.

Thanks

Dan

[mmwjr]

Welcome aboard

It probably the check valve not closing. It is either in or right after the freshwater pump. The city water ties into the water system after the pump.

[All Summer Long II]

Check valve..... need to search that out. Any way to troubleshoot it once I find it?

[mmwjr]

See if the freshwater tank starts filling when on the city water. If so the check valve is letting it back flow throught the pump.