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Old 10-19-2021, 08:19 PM   #1
Junior Member
Join Date: Jul 2018
Location: Valley Center, CA
Posts: 10
Need some info please

Good Afternoon fellow Newmar Owners.

We recently picked up our new 2022 Ventana and are on our first trial run.

Can anyone kindly explain what value needs to be left "OPNE" while using the washing machine or dishwasher???

Thanks for any and all help with this issue.

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Old 10-19-2021, 08:32 PM   #2
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Just George's Avatar
Newmar Owners Club
Freightliner Owners Club
Join Date: Aug 2017
Posts: 125
Leave the GRAY valve open
2022 Dutch Star 4369
2015 Newmar Ventana 4369 w Hydralift
2013 Explorer
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Old 10-19-2021, 08:33 PM   #3
"Formerly Diplomat Don"
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Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 18,947
Both your dishwasher and washing machine drain their water into your grey tank, which is the valve connected to the smaller pipe in your bay. One valve opens your black tank (toilet) which is a 3" valve connected to a 3" pipe. The valve on the other side is a 2" valve connected to your grey water tank and 2" pipes. On mine, the valve to the left of the drain hole is the grey water, as you look in the bay.

I know a lot of people only hook up their sewer drains when they're ready to dump their tanks. With a coach that has a dishwasher, washing machine and hydronic heating, which can allow for long showers, I always connect my hoses and open the grey water tank. This way there if you forget and do laundry and dishes, you don't overfill the tank.
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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Old 10-20-2021, 01:47 PM   #4
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Join Date: Jan 2021
Posts: 445
I leave my gray valve shut because I want that water to rinse the hose out after dumping my black tank..

The dishwasher doesn't use that much water, and on my coach, 3 loads (normal wash day for the two of us) in the washer is about 1/4 of my gray tank.

We just check the gray tank level before starting the wash. If it's above 60%, I'll go ahead and flush both tanks, or if the black is almost empty, I'll bleed a little off the gray tank.
Steve & Carrie
2019 London Aire 4576, Spartan K3, 605 Cummins
2019 F250 King Ranch 4x4
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Old 10-20-2021, 02:04 PM   #5
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Location: Fort Lauderdale, Fl
Posts: 216
I guess part of the decision is based on how you are using your coach. If you are moving around and only staying in places for a few days at a time I would leave the gray closed. Knowing that I will dump tanks before departure and only do one load of laundry in between.

If I was spending a month or more in one location I would probably leave it open and only close it the day before I plan to empty the black tank to store up a little extra rinse water.
2022 Dutch Star 4369 FL - Hoping Nov Dec Delivery!?
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