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Thread: Winterizing my Reflection 337RLS
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10-16-2021, 09:20 PM #1
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Winterizing my Reflection 337RLS
I have a 2020 Reflection 337RLS and when winterizing it for the first time I could not get the antifreeze to pick up from the water pump. After some time I called my brother in law since he had a Momentum and he told me without hesitation that they will not pick up the antifreeze, I would have to pour it in using a hose and funnel. It worked but my question is: Is this a common problem with the Grand Design RV's or just certain ones? If it is a known issue what is the fix other than replacing a perfectly good water pump? It makes it impossible to winterize my trailer without a second person. Thanks for any suggestions or comments!
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10-16-2021, 09:33 PM #2
If using the Nautilis system, some people have had good luck by removing the inlet screen check valve from the city water inlet connection, some have flipped it around with good success as well.
Sent from my SM-G950U using Tapatalk2023 Momentum 398M-R
2023 Ford F-450
SOLD - 2021 Reflection 311BHS
SOLD - 2017 Momentum 399TH
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10-17-2021, 06:55 AM #3
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Steve & Tami Cass - Escapee's, FMCA Members, Texas Fulltimers Since July 2020
2019 Solitude 3350RL S-Class, 2018 Ram 3500 DRW, Laramie Longhorn, B&W Companion, Texas Class A Non-CDL Drivers License
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10-17-2021, 07:07 AM #4
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I winterized my 303 yesterday. I had to put the jug of antifreeze on a ladder so it was higher than the Nautilus system.
Mike & Linda
303RLS
2013 F250 Turbo Diesel Crew Cab
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10-17-2021, 10:22 AM #5
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10-17-2021, 11:20 AM #6
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Had the no prime problem last week. Pump sucked 1/2 bottle of antifreeze and then nothing. Thanks to the advice on earlier posts on this subject on this forum I reversed the screen on the City Water input and immediately all was good. And yes, I did restore the screen to normal afterward.
2021 Reflection 31MB
2022 Cougar Half Ton 29RLI
2023 RAM Laramie 2500 Crew Cab CTD 4X4
Demco Slider Hitch, MorRyde Pin Box
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10-17-2021, 11:24 AM #7
Just finished mine. Just air though. Went well.
2019 GMC 3500 SRW Sierra Denali Duramax
2020 Reflection 315RLTS
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10-20-2021, 09:01 PM #8
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Geoff and Cheri
2011 F250 CC 6.7L
Firestone Ride Rite Airbags
Pull Rite 16k SuperGlide
2018 Reflection 303RLS, Build date 9/2017
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10-21-2021, 04:37 AM #9
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@Top Cat
I've done mine 4 times now and haven't had a single issue. Are you following the steps in the owners manual with all of the valves in the correct positions for each step? I made up a short hose from clear 1/2" tubing and a brass male hose end. Make sure the hose is cut at an angle so it doesn't suck up against the bottom of the jug. After blowing out the system with air then I sit my jug of antifreeze right up next to the Nautilus system and go from there.... never takes more then 2 gallons unless I make a mistake and forget to close a faucet.
Don't forget the toilet water feed, the washer hook ups, and especially the outside shower. Even if you never connect the coil hose and don't use the outside shower there's a strong possibility of water being in that fixture... so make sure it also gets a stream of antifreeze through both the hot & cold valves.
And if you're like me and use a small pail under each faucet to collect the antifreeze and keep it from splattering everywhere then make sure to add a little to each trap in the system.Last edited by IBEW Sparky; 10-21-2021 at 04:52 AM.
Bill & Colleen ~ Schwenksville, Pa
2019 Reflection 337RLS
2006 GMC Sierra 3500 8.1L V-8
Firestone Ride-Rite Air Bags
Front Stabilizer Bar
Rear Anti Sway Bar
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10-21-2021, 09:00 AM #10
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First time winterizing my 2021 RLS-337. I cut a short hose so I could draw from a bucket with 2 gallons of antifreeze in it sitting on a ladder to have it downstream feed. At first I had a problem with no liquid being passed. I found that I did not have the white Nautilus valve set correctly. Fixed that and the pump started drawing the antifreeze immediately. I probably did not even need the ladder and next time will just place the bucket in the pass thru. Made sure hot and cold were flowing across faucets/showers. Wiped up the antifreeze in the sinks/shower and was done in minutes. Maybe next year I'll drain the antifreeze into a bowl (thanks Bill) so I don't have to wipe up.
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