Steps to empty/flush the tanks - Dutchmen Owners

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Old 06-26-2018, 08:09 AM   #1
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Steps to empty/flush the tanks

Help on draining/flushing the tanks (toilets specifically)....I had an older motorhome before so I am familiar with RV's, but this is not the same as it is so technical. Not sure if I am using the system correctly to dump/flush the tanks. Can someone tell me the proper steps to drain the tanks, also it does have 2 bathrooms.

I have had to put a hose through the back bathroom window to flush out the bathroom toilet cause when I open the valve nothing comes out and its the only way I know for sure that it is getting truly flushed/cleaned out.

This is on a 2018 Voltage v-series 3805 toy-hauler.
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Old 06-26-2018, 11:07 AM   #2
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Can't speak to your model specifically but if you have two bathrooms, you have 4 holding tanks; two black and two grey. On my unit the front tanks for bath etc. were in the wet cabinet (both black and grey). For the back bath, etc., the second grey handle is above the tires on driver's side and the second black handle was back near the back drain. Drain either black tank first, then do the other black tank (assuming you have a "Y" valve and have both tanks hooked up, otherwise do one set (black and grey) at a time. Repeat with grey tanks. Then use the sani-flush and rinse out both black tanks one at a time. No way should you need a hose thru a window.
Rusty
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Old 06-26-2018, 12:26 PM   #3
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There's no rinse on the back black tank on my 3950 (but I don't use it so it doesn't matter). When we used it years ago, the only rinse we did was to hold the toilet valve open.
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Old 06-26-2018, 02:17 PM   #4
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Thank you, I'll let my husband know! As you know it's the part about camping you DON'T want to mess around with ;-)
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Old 06-26-2018, 02:18 PM   #5
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Thank you!
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Old 06-27-2018, 10:53 AM   #6
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Quote:
Originally Posted by joebedford View Post
There's no rinse on the back black tank on my 3950 (but I don't use it so it doesn't matter). When we used it years ago, the only rinse we did was to hold the toilet valve open.
Interesting - as my 3950 has a San-I-Flush for the rear black tank - connection is on the side below and slightly forward of the bathroom window. The connection and anti-siphon is under the sink.

Funny how the same models vary one unit to the next...
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Old 06-27-2018, 09:04 PM   #7
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Originally Posted by donzinger View Post
Interesting - as my 3950 has a San-I-Flush for the rear black tank
You got me wondering if I was having another senior moment - nope, not this time. My 2011 was the first year - it doesn't have a lot of "improvements" that came in later years.
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Old 06-27-2018, 09:05 PM   #8
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Makes sense! The model change, not the senior moment. LOL

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Old 06-28-2018, 12:35 PM   #9
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I picked up a Flush King about 2 years ago and it works AMAZINGLY well for cleaning out the tanks. You attach it to the discharge pipe (where you put the hose on to dump) then put on a hose to shoot water back up the system. Anyway, 2 or 3 times filling and flushing at the dump station and it's crazy the stuff it breaks loose.
https://www.campingworld.com/flush-king
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Old 06-28-2018, 12:38 PM   #10
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My 2013 V3600 has a combo tank to handle the sink and toilet of the rear half bath. It also has a saniflush, but I find better results with a hose in the toilet. We have 2 sewer connections. I flush the rear first and then hook up the front. Front black, gray, and then kitchen.
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