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09-13-2020, 08:39 AM
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#1
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Senior Member
Join Date: Jul 2020
Posts: 205
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Berkshire 2014 390FL Fresh Water filling
How do I determine when the fresh water is full without running inside and watching the guage?
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09-13-2020, 08:50 AM
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#2
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Senior Member
Join Date: Mar 2016
Location: Pleasant Prairie WI
Posts: 1,479
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To keep it simple,
Know your gallons per minute fill rate. Will be most accurate at home.
Empty your fw tank.
Start your stop watch and fill your fw tank.
When you hit the gauge levels, record the elapsed time.
Now you will know how long it takes to reach a gauge level.
__________________
2006 Sunseeker 2860DS Ford V10 5 speed with Tow/Haul
Winegard T4 In Motion Satellite Dish
Furion Rear Camera, RecPro 70" Recliners
Mohawk Luxury Vinyl Plank Flooring
2013 AWD Acadia Denali, Blue Ox Equipped
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09-13-2020, 09:03 AM
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#3
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Senior Member
Join Date: May 2017
Posts: 5,712
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Quote:
Originally Posted by parise
To keep it simple,
Know your gallons per minute fill rate. Will be most accurate at home.
Empty your fw tank.
Start your stop watch and fill your fw tank.
When you hit the gauge levels, record the elapsed time.
Now you will know how long it takes to reach a gauge level.
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As long as every single place you fill at......is exactly the same GPM as the one you used for the test.
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09-13-2020, 09:13 AM
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#4
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Senior Member
Join Date: Mar 2016
Location: Pleasant Prairie WI
Posts: 1,479
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Yup, I said that. Will be most accurate at home.
__________________
2006 Sunseeker 2860DS Ford V10 5 speed with Tow/Haul
Winegard T4 In Motion Satellite Dish
Furion Rear Camera, RecPro 70" Recliners
Mohawk Luxury Vinyl Plank Flooring
2013 AWD Acadia Denali, Blue Ox Equipped
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09-13-2020, 09:29 AM
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#5
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Senior Member
Join Date: May 2017
Posts: 5,712
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Quote:
Originally Posted by wdweldon
How do I determine when the fresh water is full without running inside and watching the guage?
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What I've done with every single popup, TT, that we've ever owned, is to run the water till it came out of the "Overflow Tube" underneath and then I turned off the water.
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09-13-2020, 09:44 AM
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#6
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Senior Member
Join Date: Nov 2016
Location: Montana
Posts: 605
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I bought a small in-line water meter at Ace I just screw in and keep track of. On my coach the overflow tube is routed poorly so I prefer to keep track of the gallons (although an estimate rather than exact) that way. On past rvs we’ve had I just watched the overflow tube.
__________________
2016 Berkshire XL 40A towing 2020 Jeep Wrangler unlimited.
Prior to this Jayco fifth wheel: 24' Eagle, 30'Designer, and 40' Jayco pinnacle.
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09-13-2020, 09:48 AM
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#7
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Senior Member
Join Date: Jul 2020
Posts: 205
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Exactly where is the overflow hose? Do you suggest I overfilling once to find the hose?
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09-13-2020, 10:01 AM
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#8
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Senior Member
Join Date: Nov 2016
Location: Montana
Posts: 605
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Yours may be placed differently, but on my coach I can see the hose when I open the compartment holding the fw (and the water pump). Every overflow tube I’ve seen comes out below where the fresh water tank is.
__________________
2016 Berkshire XL 40A towing 2020 Jeep Wrangler unlimited.
Prior to this Jayco fifth wheel: 24' Eagle, 30'Designer, and 40' Jayco pinnacle.
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09-13-2020, 10:10 AM
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#9
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Senior Member
Join Date: May 2017
Posts: 5,712
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Quote:
Originally Posted by wdweldon
Exactly where is the overflow hose? Do you suggest I overfilling once to find the hose?
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I overfilled every time I filled the tank. Always knew the tank was full then.
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09-13-2020, 02:24 PM
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#10
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Senior Member
Join Date: Sep 2012
Location: Charleston County SC
Posts: 767
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Quote:
Originally Posted by wdweldon
Exactly where is the overflow hose? Do you suggest I overfilling once to find the hose?
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Be careful with Berkshires of that years. The overflow does not always allow water out and if you look at the fresh water tank some greatly expand upward with a big bulge
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09-19-2020, 08:30 PM
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#11
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Junior Member
Join Date: Sep 2018
Posts: 22
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What he said, but...
On my 2013 390FL, if I overfill, the tank does expand...then the overfill tube works but turns into a siphon partially emptying the tank. So I just watch the tank level behind the gray/black water drain and make sure I never overfill. Pain watching it, but I have the time...I'm retired!
__________________
Phil & Kathi
USAF/USAF Civil Service Retired; 2013 Forest River Berkshire 390FL, 2011 Equinox, TireTracker
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10-17-2020, 12:47 PM
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#12
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Senior Member
Join Date: Oct 2012
Location: Southwestern Mi
Posts: 1,242
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I've got the same coach. I just open the door on the passenger side covering the water tank and pump. Prop it open and watch the progress. I did forget at one time when I was filling and it did fill up and look like it was going to burst. I won't do that again.
Rich
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10-27-2020, 01:59 PM
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#13
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Senior Member
Join Date: Mar 2015
Location: Calgary
Posts: 994
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My fresh water tank bulges when I fill it, but I don't worry about it.
Basically, the tank is a wide rectangular box. The water pressure in the tank will naturally push the wide roof up. This wouldn't happen if the tank had a spherical shape, but that wouldn't be very efficient.
The tank looks like it is a pretty strong roto-molded plastic, so I don't think it will burst from the pressure of gravity in the tank. We aren't pressurizing the tank above normal atmospheric pressure as long as the overflow tube lets water out.
–Gordon
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