Ok,
I've installed a new pump. Runs quieter but the vibration of the hard
pipe is what caused the noise. Now I have another issue, once the pump is
running and I use water it pulsate. In other words it runs, stops for a second
and the runs again and continues like that. On and off constantly
I wish could add a photo also, since the plumbing seen weird to me
because the intake hose goes into the pump but a second line with a valve. The out line on the pump the attaches to this same line with the valve and then to the coach. Not sure what the purpose of this valve is.
and when it should be on or off.