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07-11-2020, 11:10 PM
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#1
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2 Rivet Member
2016 30' Classic
Resurrection Bay
, Alaska
Join Date: Feb 2018
Posts: 22
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Weird fresh water tank increases
Hi Riveted Ones!
Please help me understand this weirdness: “ZEPPY” a 2016 Airstream Classic 30 RBQ is hooked-up to resort fresh water and “yes” appropriately screwed into the city water inlet. My fresh water tank which should be empty keeps creeping up about 5% every couple of weeks. Any idea what’s up with this? It’s now at 40% and no water has been added to fresh water tank. Yes, black and gray tanks religiously emptied, if not at full hookup RV park. Any/all advice welcome!
__________________
“Ingenuity reflects brilliance-cultivated, mediocrity reveals self-inflicted sabotage.” DocHalo
DocHalo / KL4QE
Resurrection Bay, Alaska
2016 Airstream Classic RBQ "ZEPPY"
2016 Nissan Titan XD 4x4 Crew Cab (Diesel)
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07-11-2020, 11:21 PM
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#2
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Rivet Master
1995 25' Excella
xxxxx
, xxxxxx
Join Date: Apr 2015
Posts: 2,349
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City water is back flowing through the pump due to a faulty check valve.
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07-12-2020, 12:46 AM
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#3
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Rivet Master
2014 20' Flying Cloud
Sag Harbor
, New York
Join Date: Jun 2015
Posts: 17,523
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Probably correct IMO.
"Bad pump check valve water tank filling" -- https://www.google.com/search?q=bad+...=airforums.com
By the way, you should never leave the city water "on" when you leave the trailer unattended IMO. Please don't ask why . . .
Good luck,
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07-12-2020, 05:03 AM
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#4
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Luminous
1983 27' Excella
Vesuvius
, Virginia
Join Date: Jun 2012
Posts: 228
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Have you tried unhooking city water and then seeing if you get water flow from the tank? If you do it’s the check valve, not the water level indicator.
__________________
Steve
83 Excella 27
07 Tundra Limited
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07-12-2020, 07:06 AM
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#5
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Rivet Master
1972 23' Safari
Middletown
, Rhode Island
Join Date: Sep 2016
Posts: 546
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Check valve in water pump probaly has some sediment in it or needs cleaning or replacing, mine is doing the same thing. Turn off city water flow, run your waterpump and open up faucets until water is empty in fresh water holding tank. Usually this cleans out sediment and fixes the problem, I've done this twice and it solved my problem. If it persists try taking the water pump apart to clean or replace check valve. (Make sure you have adequate amount of water in the holding tank to clean out pump, do not operate dry)
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07-12-2020, 08:25 AM
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#6
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Rivet Master
1986 31' Sovereign
Miami
, Florida
Join Date: Feb 2004
Posts: 3,137
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You can also simply fill your tank, turn off the city water and use your pump. I do it whenever I am on 2 way as it helps with water discipline (my pump is 2.2 gph, city water can be well above that). Even if you only do it occasionally, it is good to exercise anything mechanical (the pump) and by running treated water through the tank and it’s plumbing you prevent anything taking up residence.
I also travel with a full fresh water tank. I like all that weight down low, helps with the center of gravity. It also is nice to have if your next stop has poor or no water.
__________________
Sorta new (usually dirty) Nissan Titan XD (hardly paid for)
Middle-aged Safari SE
Young, lovely bride
Dismissive cat
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07-12-2020, 11:55 AM
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#7
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3 Rivet Member
2016 27' Flying Cloud
McDonough
, Georgia
Join Date: Apr 2016
Posts: 128
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Quote:
Originally Posted by OTRA15
Probably correct IMO.
By the way, you should never leave the city water "on" when you leave the trailer unattended IMO. Please don't ask why . . .
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X2 ^ - nothing like coming back to trailer (our former SOB) to find a pretty waterfall coming out of it........ Fortunately, not gone long, no damage....
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07-12-2020, 02:00 PM
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#8
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3 Rivet Member
2016 27' International
North Augusta
, South Carolina
Join Date: Jul 2019
Posts: 122
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Mine would occasionally go from 0 to 30 randomly even though I hadn’t put any water in it. I opened my fresh water tank valve to ensure there wasn’t anything in it. After I confirmed it was empty my best guess was condensation inside the tank from the little bit of water that couldn’t drain.
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07-21-2020, 09:33 AM
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#9
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Rivet Master
1972 23' Safari
Middletown
, Rhode Island
Join Date: Sep 2016
Posts: 546
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So my fresh water tank still fills up occasionally and starts overflowing when I'm on city water so instead of trying to fix my waterpump and having this happen again I plan on installing a one way valve/backflow preventor on my output side of my pump. That should solve anymore fresh water tank overflow. I got the one way valve from vintage trailer suppies.
https://vintagetrailersupply.com/bac...entor-vts-725/
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07-26-2020, 10:05 AM
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#10
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Rivet Master
2014 20' Flying Cloud
Sag Harbor
, New York
Join Date: Jun 2015
Posts: 17,523
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Have you tried clearing the debris in the check valve by turning the pump on and off in rapid succession, while you have the city water on also?
A very simple fix for most folks IMO.
Also, if you are not using an RV hose filter in your hose, for both city and tank water, you are running the risk of sand and grit getting your faucet/shower aerators, as well as the water heater's PRV [pressure relief valve], all of which can create other problems.
Google search results in Post #3 lead to informative other threads/posts.
Cheers,
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08-02-2020, 09:00 PM
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#11
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Rivet Master
1972 23' Safari
Middletown
, Rhode Island
Join Date: Sep 2016
Posts: 546
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Quote:
Originally Posted by OTRA15
Have you tried clearing the debris in the check valve by turning the pump on and off in rapid succession, while you have the city water on also?
A very simple fix for most folks IMO.
Also, if you are not using an RV hose filter in your hose, for both city and tank water, you are running the risk of sand and grit getting your faucet/shower aerators, as well as the water heater's PRV [pressure relief valve], all of which can create other problems.
Google search results in Post #3 lead to informative other threads/posts.
Cheers,
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Yup I use a filter for city water hook up and I have ran my pump on and off and it did clear out the debris/problem but It only lasted for a short while. So instead of worrying about anymore overflow into my fresh water tank while on city water I installed the one way valve and also a cut off ball valve.
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