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12-08-2019, 09:16 PM
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#1
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Senior Member
Join Date: Jun 2015
Posts: 1,077
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Fresh Water Siphoning Problem
If anyone is interested in making a modification to stop this from happening, and you're going to be at the Tampa Super show, PM me. -Paul
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2017 Ventana 4369
towing a 2013 Honda CRV
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12-08-2019, 09:33 PM
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#2
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"Formerly Diplomat Don"
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 24,125
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I need my coach waxed....are you doing other projects.
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Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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12-08-2019, 09:40 PM
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#3
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Senior Member
Join Date: Aug 2016
Location: Holbrook Long Island New York
Posts: 1,369
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Quote:
Originally Posted by PandS
If anyone is interested in making a modification to stop this from happening, and you're going to be at the Tampa Super show, PM me. -Paul
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I will be there on the 15th and 16th and agree it is an issue Perhaps Ron might be able to explain why and best way to modify or even get as a special or done at FPU
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Smile, Father Loves YOU
Daniel
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12-09-2019, 06:56 AM
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#4
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Senior Member
Join Date: Jun 2015
Posts: 1,077
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Did the mod yesterday and now have enough extra hose to do another.
Getting the pegboard off and back on was a pain in the butt. I don't know why they had to build it so tight to the opening. There should be 1/4'" of clearance per side - My Coach had none. -Paul
__________________
2017 Ventana 4369
towing a 2013 Honda CRV
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12-09-2019, 07:23 AM
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#5
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Senior Member
Join Date: Nov 2012
Location: WATERBURY, CT.
Posts: 1,219
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Quote:
Originally Posted by PandS
Did the mod yesterday and now have enough extra hose to do another.
Getting the pegboard off and back on was a pain in the butt. I don't know why they had to build it so tight to the opening. There should be 1/4'" of clearance per side - My Coach had none. -Paul
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Are you talking about the fresh water tank dumping water when decending a hill or sharp corner, I noticed mine does that?
If so what is the mod, Care to Share
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My name is Ted, My coach 2019 NEWMAR Ventana 4369 (Vickie) Cummins L9 451 Horsepower.
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12-09-2019, 09:10 AM
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#6
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Senior Member
Join Date: Jun 2015
Posts: 1,077
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Quote:
Originally Posted by Vickie 4369
Are you talking about the fresh water tank dumping water when decending a hill or sharp corner, I noticed mine does that?
If so what is the mod, Care to Share
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Here's a link to past discussion of the problem and solution.
http://www.irv2.com/forums/f103/wate...ng-370162.html
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2017 Ventana 4369
towing a 2013 Honda CRV
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12-09-2019, 09:32 AM
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#7
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Senior Member
Newmar Owners Club Freightliner Owners Club iRV2 No Limits Club
Join Date: Nov 2016
Location: Tucson, Arizona
Posts: 1,580
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This was my solution. I also added a gravity fill while the area was opened up.
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Our Blog - Wandering Toes
Our Coach - 2005 Newmar Northern Star | 350 Cat C7 3126 | Freightliner XC Chassis
2018 Jeep Renegade Trailhawk
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12-09-2019, 09:56 AM
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#8
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Member
Join Date: Aug 2015
Location: Seal Beach, California
Posts: 65
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What I did was to go to a local marine store. They will have an anti-siphon loop, as they are used all the time in sail boats to prevent sea water from siphoning into the galley sinks when they are below the water level.
Install the anti siphon loop in the vent line that Newmar installs on the tank, and problem solved.
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Bob and Jackie
2012 Mountain Aire 4344
2021 Chevy Colorado "Bison"
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12-09-2019, 10:01 AM
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#9
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Senior Member
Join Date: Nov 2015
Posts: 26,848
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Drill a 1/16" hole in top of overflow........anti-siphon effect.
No extra hoses/plumbing required
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I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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12-09-2019, 07:02 PM
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#10
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Senior Member
Join Date: Nov 2012
Location: WATERBURY, CT.
Posts: 1,219
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Quote:
Originally Posted by Beach Aire
What I did was to go to a local marine store. They will have an anti-siphon loop, as they are used all the time in sail boats to prevent sea water from siphoning into the galley sinks when they are below the water level.
Install the anti siphon loop in the vent line that Newmar installs on the tank, and problem solved.
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What is the Hose inside diameter, or what size loop fits.
__________________
My name is Ted, My coach 2019 NEWMAR Ventana 4369 (Vickie) Cummins L9 451 Horsepower.
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12-09-2019, 07:28 PM
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#11
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Senior Member
Newmar Owners Club Freightliner Owners Club iRV2 No Limits Club
Join Date: Nov 2016
Location: Tucson, Arizona
Posts: 1,580
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Quote:
Originally Posted by Old-Biscuit
Drill a 1/16" hole in top of overflow........anti-siphon effect.
No extra hoses/plumbing required
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I tried that first. Still had a siphoning problem. I ended up raising the loop and then drilling the 1/16" hole and that finally stopped it.
__________________
Our Blog - Wandering Toes
Our Coach - 2005 Newmar Northern Star | 350 Cat C7 3126 | Freightliner XC Chassis
2018 Jeep Renegade Trailhawk
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12-28-2019, 03:15 PM
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#12
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Senior Member
Join Date: Nov 2012
Location: WATERBURY, CT.
Posts: 1,219
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No one knows the diameter of the pipe?
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My name is Ted, My coach 2019 NEWMAR Ventana 4369 (Vickie) Cummins L9 451 Horsepower.
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12-28-2019, 04:16 PM
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#13
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Senior Member
Join Date: Jun 2015
Posts: 1,077
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Quote:
Originally Posted by Vickie 4369
No one knows the diameter of the pipe?
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Here's what we used:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
We used about 5 1/2 feet.
__________________
2017 Ventana 4369
towing a 2013 Honda CRV
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12-28-2019, 04:23 PM
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#14
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Senior Member
Join Date: Nov 2014
Posts: 2,515
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If the loop is high enough the water will never get to the top to create a siphon. Water must be falling to create a siphon. Raised the hose up at least 18 in or more and no hole have had no loss of water.
If the cause is not a siphon the higher loop will stop the overflow spillage/sloping of the water. If the water slops over the 18” loop slow down......
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2019 Dutchstar 4369 Spartan. Full wall failure survivor.
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