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Old 03-05-2021, 02:49 PM   #1
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Location: Portage, MI
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Black tank rinse

When we drain our black tank, it only empties to 1/4 according to the gauge. Then we attach a hose to the black tank rinse fitting, and after a rinse the gauge drops to 'E'. So far so good.
But for the past year (we're FT), there doesn't seem to be any rinsing - I don't hear or feel water running through the hose. I posted a question about this last fall, and got a couple suggestions to remove the rinse, clean it out (or drill slightly larger holes) and re-assemble.
Problem is: how do I do that? I've searched iRV2 but it seems each manufacturer places it differently.

So, Newmar friends, how do I remove that rinse fitting (tube?) to clean it?
37' 2004 Newmar Mountain Aire gas, 2007 CR-V toad
Full Time since August 2016
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Old 03-05-2021, 02:56 PM   #2
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You have to access the sides of the black tank where the flush water enters. This may require some crawling around in the lockers and removing some access panels. When you finally access the flush connections, run some water through it to clear the line. Then make sure that the flush water connection has a screen in the connection.

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Old 03-05-2021, 03:07 PM   #3
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Before I dis-assembled anything I would try to clear the tube between the female hose connector and the black tank.

Remove the hose washer and screen and snake the tube with a plastic wire tie or similar item.
'04 Newmar MADP, 1100w of solar, towing a jeep wrangler
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Old 03-06-2021, 11:47 AM   #4
"Formerly Diplomat Don"
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"arboldt".....On my 2005 Monaco Diplomat, I ran into the same issue. Toilet paper would collect in the sprayer nozzle tip when the tank would be nearly full. Once the tank was emptied, the toilet paper would dry hard like paper mache, clogging the head.

You'll need to pull the panel in the bay, on the passenger side of the coach, opposite the tanks. Then look for a garden type/size hose feeding a plastic nozzle, about an inch or so in diameter. On my Diplomat, it was a pain to remove the nozzle and soon clogged again. I finally, disconnected the hose, leaving the nozzle in place and used an 1/8" drill and just drilled several holes in it, through the hose connection opening. I didn't really care if it no longer had a directed spray, I just wanted it to push water into the tank for rinsing.
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black tank, tank

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