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12-04-2020, 12:01 AM
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#1
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Senior Member
Join Date: Jun 2011
Location: On Another Adventure
Posts: 2,563
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Fresh water tank
WHY does my fresh water tank occasionally fill to overflowing when I’m hooked up to city water???
I recently had the check valve in the water pump replaced hoping that would fix the issue but I discovered that it’s occurred again tonight....
Doesn’t do it all the time - just occasionally....
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12-04-2020, 02:10 AM
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#2
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Senior Member
Join Date: Jan 2020
Posts: 4,866
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Well, that one single check valve in the pump is the only isolation between city water pressure and the fresh water tank. Might want to think about adding a second check valve external to the pump.
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12-04-2020, 02:17 AM
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#3
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Senior Member
Join Date: Jun 2011
Location: On Another Adventure
Posts: 2,563
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Good idea ...... before or after the water pump???? Just cut the pvc and install???
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12-05-2020, 05:27 PM
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#4
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Senior Member
Join Date: Jun 2011
Location: On Another Adventure
Posts: 2,563
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Think I’m just gonna replace the entire pump... tired of dealing with check valve issues, especially after having a new one installed back in June...,
Anyone ever used a Highflow brand pump??? 4.5 gpm at 60psi... Tractor Supply has it for $119.00.... I believe it’s main use is as a sprayer pump...
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12-07-2020, 09:29 AM
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#5
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Member
Join Date: Nov 2020
Location: White Hall, Arkansas
Posts: 73
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Is that pump you're replacing a Shurflo 5900-0201?
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12-07-2020, 09:51 AM
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#6
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Senior Member
Join Date: Apr 2020
Location: USA
Posts: 149
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I’m going through the same thing right now. I’m staring at all the new parts as we speak. On another post I was informed that the water miser if you have one may also be causing the problem and not the pump. I haven’t investigated that yet. My fresh water tank 52 gallons would fill to overflowing in less than 24 hours.
Instead of check valves I’m using a shut of valve and will only turn it on when not connected to city water. Good luck with your issue.
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12-07-2020, 10:47 AM
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#7
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Senior Member
Join Date: Jun 2011
Location: On Another Adventure
Posts: 2,563
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I’m putting in a new water pump!!!
My understanding is that the check valve in the water pump should not allow this to happen...
It’s really frustrating to go outside and see water coming out the overflow tube every day or so...
I’ve already had the check valve replaced to the tune of $172 so a brand new, larger (5.5 gpm vs 3.5 gpm) for $120 is a no brainer to me....
Should receive new one Thursday.... And it’s not another Shurflow!!!
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12-07-2020, 07:18 PM
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#8
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Senior Member
Join Date: Jun 2011
Location: On Another Adventure
Posts: 2,563
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The pump I’m replacing is a Shurflo 4008-101-E65 that produces 3.5 GPM... Had it installed June 2019 and had a new check valve installed June 2020...
I’m replacing it with a SEAFLO 55 Series 5.5 GPM Variable-Flow Automatic-Demand Water Pump.... cost - $120.00
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12-08-2020, 05:31 PM
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#9
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Senior Member
Join Date: Nov 2019
Location: God’s Country
Posts: 355
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Surge tank
Anyone ever have a surge tank so the pump doesn't run continuously ?
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12-08-2020, 05:36 PM
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#10
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Senior Member
Join Date: Jun 2011
Location: On Another Adventure
Posts: 2,563
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Mine only runs when a faucet is turned on.... shuts off when faucet is turned off...
I’d think one running constantly might indicate a leak maybe???
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12-10-2020, 05:25 PM
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#11
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Senior Member
Join Date: Jun 2011
Location: On Another Adventure
Posts: 2,563
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New pump all installed....
Seaflow 51 series - 5.5 GPM.... SUPER QUIET!!!! $109.00
Easy install....
Drained water out of my fresh water tank so I can tell if pump allows water to fill it....
Fingers crossed!!!!!
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12-10-2020, 09:41 PM
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#12
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Senior Member
Join Date: Jun 2011
Location: On Another Adventure
Posts: 2,563
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Oh - I didn’t drain ALL of the water out of my fresh water tank.... Just enough to show a gap at the top of the tank...
That way I can tell if the check valve is doing it’s job....
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12-11-2020, 08:30 AM
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#13
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Senior Member
Join Date: Jan 2013
Location: Venice, FL Area
Posts: 357
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If you still fill the tank after all this work take the water selector out to see if the o-rings are torn. That was my problem, replaced it no more problems.
__________________
18 Berkshire 34QS, 2023 Jeep Grand Cherokee.
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12-11-2020, 08:59 AM
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#14
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Senior Member
Join Date: Jul 2013
Location: BoCoMo
Posts: 2,784
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Do you have a water pressure regulator on the hose coming from the city water? Reduce the pressure from the city water.
__________________
Brother Les
2013 Forest River Salem Hemisphere SBT312QBUD
2001 CrewCab F-250 7.3 PowerStroke Diesel
SuperChip, BTS transmission, 6.0 Trans Cooler
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12-11-2020, 09:04 AM
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#15
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Senior Member
Join Date: Jul 2013
Location: BoCoMo
Posts: 2,784
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Quote:
Originally Posted by ernest917
I’m putting in a new water pump!!!
My understanding is that the check valve in the water pump should not allow this to happen...
It’s really frustrating to go outside and see water coming out the overflow tube every day or so...
I’ve already had the check valve replaced to the tune of $172 so a brand new, larger (5.5 gpm vs 3.5 gpm) for $120 is a no brainer to me....
Should receive new one Thursday.... And it’s not another Shurflow!!!
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If your city water pressure is high (large campground), the city water pressure can over come the Fresh Water tank pump check valve. Reduce the city water pressure with a pressure regulator on the hose. It sounds by some of your statements that you my have your Fresh water tank pump 'on', when hooked up to 'city water', the fresh water tank pump should be 'off'.
__________________
Brother Les
2013 Forest River Salem Hemisphere SBT312QBUD
2001 CrewCab F-250 7.3 PowerStroke Diesel
SuperChip, BTS transmission, 6.0 Trans Cooler
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12-11-2020, 12:35 PM
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#16
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Senior Member
Join Date: Jun 2011
Location: On Another Adventure
Posts: 2,563
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I’ve always used a regulator..... I carry 4-5 on board....
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12-11-2020, 12:35 PM
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#17
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Senior Member
Join Date: Jun 2011
Location: On Another Adventure
Posts: 2,563
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Pumps always off when hooked to city water....
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12-11-2020, 12:54 PM
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#18
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Senior Member
Join Date: Jun 2011
Location: On Another Adventure
Posts: 2,563
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It appears the new pump has resolved my issue - fresh water tank not filling now.... been almost 20 hrs with city water turned on....
Fingers crossed!!!
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