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Old 09-18-2018, 09:06 PM   #1
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Air in the fresh water lines

This one has me stumped. 2005 National Dolphin LX. The bathroom faucet, when turned on,(closest to the water pump) spits and sputters both hot and cold water. I think there is air in the kitchen lines too but not as noticeable, maybe due to the distance from the pump. I have no leaks and the pump holds pressure for hours without cycling. I'm sure it's picking up air before the pump inlet but I have no idea where. Anyone have a similar issue? Any ideas?
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Old 09-18-2018, 09:48 PM   #2
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There is an inlet side screen on the pump , and the housing for the screen may be cracked , and is the pump is mounted higher that the fresh tank , it won't leak water ; only suck air.

The inlet hose and the screen housing should only be hand tight , so no need to go in with tools to check.
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Old 09-18-2018, 11:56 PM   #3
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Have you checked the position of the handles in the water bay? There is one handle that is for filling your water system with anti-freeze that goes to the inlet to the pump. If the handles aren't turned completely it will allow air into the system.The correct position of the handles is noted by an *.
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Old 09-23-2018, 01:38 PM   #4
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Air in the fresh water line

Thanks for the help. Belgiam was spot on. When I filled the tank, I would leave the handle in the fill position since I wasn't on city water but the * was on the city water position. When I changed it over to the city water position, the problem was fixed. I probably could have figured it out if I would have read the directions but hey, I'm a guy! Thanks again.
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