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Old 04-09-2016, 08:02 AM   #31
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5picker, I think RSchleder is talking about wrapping tape around filter cap and not vent cap.

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Old 04-09-2016, 08:17 AM   #32
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The FW filler cap is there primarily to keep foreign material ( dirt) out of the FW tank. If you seal the FW inlet and vent the system will not operate.


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Old 04-09-2016, 11:30 AM   #33
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Originally Posted by hdmtnrider View Post
5picker, I think RSchleder is talking about wrapping tape around filter cap and not vent cap.
Well... maybe he was... but he specifically said 'filler cap' and 'filler neck'.
That made me believe he was talking about the port on the side of his unit where you add fresh water to the tank.

None the less, the fresh water tank is a vented system and needs air to replace the water as it is drawn out of the tank. If you don't vent the tank, it won't draw water very long. The analogy to the kid sucking on a straw in a juice box was spot on.
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Old 04-09-2016, 01:39 PM   #34
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Try putting the anti freeze suction hose in some water and see if it will prime.
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Old 04-09-2016, 01:48 PM   #35
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Don't know if it's been said didn't read whole thread. We had same problem this year, did same as you. But some how the strainer before pump got a hairline crack and cause pump to suck air. Hope this helps, or if you already fixed. Congrats and happy camping

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Old 04-09-2016, 01:52 PM   #36
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Sounds like we all have our stories about this particular problem and how we fixed 'em It has happened to me twice on two different rigs and both were the same cause. The filter on the input side of the water pump was clogged. Simply unscrew the input line from the pump and you will see the filter. One clog of mine was from debris in the tank from the manufacture process, and the second was because I didn't clean the fresh water tank properly and over the winter it grew 'water boogers' that got sucked into the pump when I started it in the spring. I now have a new water tank cleaning process that the wife ensures I follow Good luck on your pump priming!
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Old 04-09-2016, 02:58 PM   #37
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I'm not suggesting the tank vent be taped. I also don't claim to be a water pump engineer.
Perhaps I'm totally wrong here, just trying to help based on my experiences with the DEMAND water pump on my Wildcat MAXX. I can't explain why my water pump ran and didn't pump water until after I eliminated the cross threaded filler cap a week ago. Just for info-- my filler tube does not have a vent ( at least that I can see) in it like I've seen on some units before, so I assume the tank has a vent somewhere other than the filler tube/neck. I've been assuming that with filler neck not sealed, the pump is sucking air! If not the case I can't figure out why my pump suddenly started to move water AFTER the cap was repositioned on the filler tube.
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Old 04-09-2016, 03:00 PM   #38
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Final update for this trip. I located and remove the filter shown above. There was some debris from manufacturing in the screen, but not enough to clog it. I had my wife turn the pump on while I held my finger over the inlet and there was no suction felt. I think the diaphragm has failed. I'll replace the pump and report back sometime before Memorial Day. (Next planned trip) For the rest of this trip, it's time to enjoy.
Thanks for all your help! It's truly appreciated.
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Old 04-09-2016, 04:03 PM   #39
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I had similar problem twice when our Solera 24R, 2013 was new. Try taking screen lifter out of city water hook-up and depress valve until water shoots out of hook-up. I don't why it worked but it worked for me.
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Old 04-09-2016, 04:11 PM   #40
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Filter not lifter.

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