Originally posted by Gerald
On our last three camping trips my water pump has been getting more and more sluggish....
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My experience was the same (using on-board pump). Little water, lots of air ... I went under the sink near the pump several times and like magic ... it started working. It seems I was bumping around but really didn't fix the problem. But I FINALLY found my problem. It was a loose cap on the screen retainer of the filter feeding into the water pump. It was NOT the input connection. I removed the input line connection using the "swivel Barb fitting" and then unscrewed the strainer assembly from the pump. With strainer/filter in-hand, I unscrewed the basket cap, cleaned some minor dirt/plastic pieces from basket, re-inserted the basket, and TIGHTENED the cap (only 2-3 threads) VERY WELL, then reversed process to reinstall. Haven't had a problem since.
Note that the image below is not quite the same as my filter. My basket retainer has a CLEAR plastic cap which retains basket. It only has 2-3 threads so it's important to check it. I was planning on putting pipe tape on fitting into pump (next time) so the basket cap would be in UP position and easier to check - on my to-do list