So I decided to sanitize the fresh water tank and plumbing today. I got a 6 gallon water can and thought I could fill the system through the gravity fill, but it won't take the water in. What am I doing wrong?
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Fitter235
Hi Mark & Cheryl
I am sure that we can help you figure this out. There are a lot of different water systems used across Grand Design products. Could you post a picture of your water panel?
Have you checked the manual that came with your trailer? This is just a guess . . . but, there is often an intake check valve that needs to be turned over before the system will draw in water or sanitizing fluid.
Rob
Cate & Rob
(with Border Collies Molly & Angel + Kitties Hazel & Elsie)
2015 Reflection 303RLS
2022 F350 Diesel CC SB SRW Lariat
Bayham, Ontario, Canada
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Originally posted by Cate&Rob View PostFitter235
Hi Mark & Cheryl
I am sure that we can help you figure this out. There are a lot of different water systems used across Grand Design products. Could you post a picture of your water panel?
Have you checked the manual that came with your trailer? This is just a guess . . . but, there is often an intake check valve that needs to be turned over before the system will draw in water or sanitizing fluid.
Rob
TonyTony G
2020 Chevy Silverado 3500 Highcountry
2016 Grand Designs Reflection 303RLS
KTM 250XC
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There is a hose off the pump called the winterization hose to pull in antifreeze that does what you are talking about. There is a gravity fill port on the side of the trailer and I should be able to fill the tank through that. I'll try and upload a picture.Mark and Cheryl
2008 Dodge Ram 3500
2021 Imagine 2670MK
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Originally posted by Fitter235 View PostThere is a hose off the pump called the winterization hose to pull in antifreeze that does what you are talking about. There is a gravity fill port on the side of the trailer and I should be able to fill the tank through that. I'll try and upload a picture.
Guest Jim, can you help here ?
RobCate & Rob
(with Border Collies Molly & Angel + Kitties Hazel & Elsie)
2015 Reflection 303RLS
2022 F350 Diesel CC SB SRW Lariat
Bayham, Ontario, Canada
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For the gravity fill at the side of my Imagine, there is what looks like a 1 1/4" hose that runs from the fill and directly to the tank. Three issues that I can think of would be a kinked inlet hose at the gravity fill, or a blocked overflow. If the nozzle on the can fits tightly in the gravity fill opening and the overflow is blocked water would stop flowing after a very short period of time. So air must flow out of the tank if water is to flow in. Mdot In = Mdot out.
The third.....is it possible there is a knock out at the inlet of the tank and this was never removed in manufacturing?
Even though some units have the gravity fill at the passthrough rather than the right side of the rig, I believe the gravity fill would still be independent from the city water valve.
For a test by the OP, can the tank be filled from a water hose at the gravity fill, and can water be seen coming from the overflow when the tank is full?
JimLast edited by Guest; 05-09-2020, 08:18 AM.
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Do you have a faucet open when trying to pull from your bucket? Also some folks say to flip the inlet screen in the city hose port to hold the check valve open. If you do this be sure to flip it back for normal use.
Hope this helps2018 Reflection 150 Series 220RK 5th whee, Star White 2022 F350 King Ranch CC Long bed (HAL) (CCC 4062lbs), B&W 25K OEM Companion,. SteadyFast system, Trailer reverse lights, rear receiver spare tire holder, storage tube, sumo springs, Victron MultiPlus 12/120/3000, Solar, Custom 6K axles upgrade, and other modifications.
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Well, after trying several things and not having any luck, I was throwing in the towel and was going schedule an appointment at the dealer to look at it. I decided to try one more thing and stuck my garden hose in the fill port. It took the water just fine. Then I tried pouring water in with my 6 gallon jug and it still would not work. I think there is a spring loaded check valve in the fill hose. The garden hose has enough pressure to overcome it, but just pouring in water won't work.Mark and Cheryl
2008 Dodge Ram 3500
2021 Imagine 2670MK
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Fitter235 -- a check valve on a gravity fill port? If so I'd think that trailer was built incorrectly. Why would GD put a check valve on a gravity fed water line? I could be wrong and the valve is bad (too strong). The WATER SUPPLY PLAN drawing I have access to (it's an older drawing last updated 3/2017) does not show a check valve on the gravity feed line.
Guest's suggestions in post 7 of a kinked hose or blocked vent sounds more likely. The pressure from the hose is overcoming the kink where the free-flowing water can't.
An easy test to check the tank's vent line--open the drain on the bottom of the water tank. (If you have a lot of water it will all be lost!) Now try and fill the tank using the gravity fill with your 6 gallon jug. If water flows freely through the gravity fill line, through the tank and out the bottom of the drain line, the problem is associated with the tank vent. If the tank still won't take water, the gravity fill line is pinched somewhere.
Of note, the OEM fill port part is here: https://www.granddesignrv.com/owner-...s/detail/30304 I do not see a vent on the part like the vent seen on the aftermarket version (Valterra on Amazon: https://www.amazon.com/Valterra-BLAC.../dp/B0735HHB84). The pic below shows the vent I'm referencing that I don't see on the OEM version (and why I think the vent on the tank in your Imagine could be the issue):
-Howard
P.S. Cate&Rob -- I'm definitely straying into a subject that for me is deep water (pun intended), so please double-check the drawing I referenced and validate (or debunk) the test/info above. Thanks!
Forum moderators are not GD employees--we are volunteers and owners presumably just like yourself. Unless specifically mentioned otherwise, we have nothing to gain should you choose to purchase a product or engage a service we discuss on this forum.
Howard & Francine
2017 Ford F-350 DRW, '19 315RLTSPlus
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This spring I sanitized my 2020 2600rb using a funnel and pouring the bleach mixture in the gravity feed port. I too doubt there is a check valve in there. Page 97 of the Imagine owners manual says "Pour the chlorine/water solution into the gravity water fill inlet." That port is meant to be a gravity feed port
Looking in mine with a flashlight I can see the white hose go straight back for a few inches then gradually slope downward. Look in your port you might be able to spot the kink if there is one near the port.
Also in the upper left corner of gravity feed port there is a small round "screen". I'm guessing that is an air vent for the fresh water tank.
Last edited by ckreef; 05-10-2020, 09:13 AM.Charles and Susan
2021 Ram 3500 6.4 Hemi, 4x4 CCSB
Andersen Hitch
2021 Reflection 337rls
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