pump sucking air

[buttman5151]

I have a 2017 sunset trail. i de-winterized it yesterday. The pump is sucking air. It is hooked to power, the fresh tank is full, and it sucks/holds pressure if i use the winterizing tube from a bucket of water. The city connection also works as it is supposed to. When I try to use the fresh water tank I get a little water and spurting air. Any help would be appreciated.

[Russb]

Originally Posted by buttman5151

I have a 2017 sunset trail. i de-winterized it yesterday. The pump is sucking air. It is hooked to power, the fresh tank is full, and it sucks/holds pressure if i use the winterizing tube from a bucket of water. The city connection also works as it is supposed to. When I try to use the fresh water tank I get a little water and spurting air. Any help would be appreciated.

Check the valve on the line that pumps the antifreeze into the system, if it is open the pump will suck air. The valve should be close to the pump.

[Delillo]

We had the same problem with our 2017. Our dealer replaced the factory pump with a Shur-Flo and its been great.

[WildWildWest]

Usually a simpler problem. The valves themselves don't seal well and the connections aren't often crimped tight enough. It has to draw greater distance so needs to be sealed. Likely not your pump but your cheap plastic valves and connections to pex pipe. Try tightening the connections if you have a crimp tool or do what I did and replace the cheap plastic valves with copper 1/4 turn ball valves with pex connections. Worked great since.

[mxmike211]

I'm having the same problem and will rebuild the input line like you did. I tested the pump on the output side and it worked.
Thx, Mike