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12-10-2020, 10:34 AM
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#1
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Junior Member
Join Date: Nov 2020
Location: Avon
Posts: 15
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Water drains on Alpine 3700FL
Besides the hot and cold low point drains there are two drains coming through the underbelly. I know one is to drain the fresh water tank, but can't figure out what the other is for. Does anyone know?
Thanks!
__________________
Andy Haiduck
2021 Alpine 3700FL
No tow vehicle
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12-10-2020, 11:27 AM
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#2
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,350
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Just guessing, but if you have a residential fridge, it might be the ice maker water line drain.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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12-10-2020, 12:01 PM
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#3
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Junior Member
Join Date: Nov 2020
Location: Avon
Posts: 15
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I had thought of that because I do have a residential, but don't understand why the lowpoint drain wouldn't take care of it.
__________________
Andy Haiduck
2021 Alpine 3700FL
No tow vehicle
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12-10-2020, 12:29 PM
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#4
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Site Team
Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,757
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Quote:
Originally Posted by haiduan
I had thought of that because I do have a residential, but don't understand why the lowpoint drain wouldn't take care of it.
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I'm guessing that drain is "T" d off between the icemaker and the solenoid in the water line. Otherwise it won't drain unless the solenoid is energized long enough for the water to drain off. But that's just a guess, perhaps someone else could confirm or cc correct.
__________________
Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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12-10-2020, 01:01 PM
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#5
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Senior Member
Join Date: Aug 2012
Location: Waco, Tx
Posts: 5,457
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Quote:
Originally Posted by haiduan
I had thought of that because I do have a residential, but don't understand why the lowpoint drain wouldn't take care of it.
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There is a cut off under the island for the water line to the icemaker in the fridge.. you need to shut it off and the drain that is off by itself (mine's in the middle of the entry door) will then drain that line..
Also, look at the water line in the slide that goes up to the fridge.. some have a petcock to drain the line and some don't.. mine doesn't but I unscrew the line at the 90` fitting to help the low point drain..
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2015 Ford F350 DRW 6.7 Diesel XL
2020 Avalanche 313 RS
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12-10-2020, 02:22 PM
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#6
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Senior Member
Join Date: Nov 2017
Location: Picacho, Az
Posts: 6,809
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My last 5th wheel it was the vent line from the fresh water tank.
For some reason on that brand they chose to vent it under the rv rather through the screened vent next to the fill port which when the tank was full would create a siphon & drain about 2/3 of the fresh water.
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Full-timed 10+ years
Sold '13 Redwood FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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12-10-2020, 08:27 PM
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#7
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Senior Member
Join Date: May 2015
Location: Rockett, TX
Posts: 481
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If you have a dishwasher it might be the drain for the water line to it.
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Jerry & Debbie
with Fur Babies Sasha & Sam
2018 Alpine 3401RS
2019 Ford F350 SRW
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12-11-2020, 02:34 AM
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#8
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Senior Member
Join Date: Oct 2020
Location: Port Charlotte
Posts: 240
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Quote:
Originally Posted by haiduan
Besides the hot and cold low point drains there are two drains coming through the underbelly. I know one is to drain the fresh water tank, but can't figure out what the other is for. Does anyone know?
Thanks!
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It is the FW vent/overflow drain. Kinda hard to drain a tank if air can't get inside. It doubles as a tank overflow. When water runs out stop filling. The tank is full.
__________________
2011 Keystone Sprinter 323BHS. Retired Master Electrician. All Motor Homes are RV's. All RV's are not Motor Homes.
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