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Topic ClosedBlack tank flushing?
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johnbryanpeters View Drop Down
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Posts: 8 		Direct Link To This Post Topic: Black tank flushing?
    Posted: 06 Oct 2016 at 12:57pm
Wow. The B&B instructions state that leakage is "normal"; http://www.bandbmolders.com/files/The_Flusher2_Install_.pdf
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JandL View Drop Down
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Posts: 364 		Direct Link To This Post Posted: 06 Oct 2016 at 11:52am
I got this PDF from “tiffinRVnetwork” and it is a very good explanation of how the vacuum breaker/check valve works in the black water flush system.

Black_tank_flush.pdf
JandL
2013 Honda Ridgeline
2012 177
2 Paynes in a Pod
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JandL View Drop Down
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Posts: 364 		Direct Link To This Post Posted: 05 Oct 2016 at 9:57pm
johnbryanpeters referenced in his post

Suggestions for replacement are Watts LF288A or Cash Acme V-101

Keep in mind that these are Vacuum Breakers only they do have a built in check valve. A check would have to added to make them the same as the B&B model 571 vacuum breaker/check valve.
JandL
2013 Honda Ridgeline
2012 177
2 Paynes in a Pod
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johnbryanpeters View Drop Down
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Posts: 8 		Direct Link To This Post Posted: 05 Oct 2016 at 6:23pm
Originally posted by Happy Tripping

Originally posted by johnbryanpeters

 
Suggestions for replacement are Watts LF288A or Cash Acme V-101 

I have ordered the V-101, and plan to relocate it when I install it.

Pardon the question from a non-plumber - How do you intend to join the new metal valve to the current non-metal tubing?
Go to my local hardware store and buy the appropriate fittings. The valve is 1/2" NPT, the tubing's PEX compatible (1/2" NSF61-9 cold/hot 150 PSI). I'll probably buy brass adapters because they're stronger.
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Happy Tripping View Drop Down
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Posts: 473 		Direct Link To This Post Posted: 05 Oct 2016 at 6:14pm
Originally posted by johnbryanpeters

 
Suggestions for replacement are Watts LF288A or Cash Acme V-101 

I have ordered the V-101, and plan to relocate it when I install it.

Pardon the question from a non-plumber - How do you intend to join the new metal valve to the current non-metal tubing?
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JandL View Drop Down
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Posts: 364 		Direct Link To This Post Posted: 05 Oct 2016 at 5:19pm
My vacuum breaker/check valve was leaking on my 177. It turned out to be a loose fitting so I just tightened it by hand and the leak stopped. I just pulled the wall back enough to get to the valve. The corner molding and 1/8" paneling are held in place with staples. It is very easy to remove the paneling. The other thing I found was the sprayer mounted in the back water tank was clogged up and so there was a lot of back pressure which contributed to the leak. The back water flush valve is held in place with 3 screws. I took it out and unscrewed the fitting from the hose and that's when I saw all the buildup inside it. Took a small brush to clean out the gunk. The small holes that water squirts out of had burrs and had never been cleaned up. I used a sharp exacto knife and a welding torch tip cleaner to remove the burrs. Everything is working as it should
JandL
2013 Honda Ridgeline
2012 177
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johnbryanpeters View Drop Down
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Posts: 8 		Direct Link To This Post Posted: 05 Oct 2016 at 1:54pm
Diagnosis of flush issue: 

Had to cut into bedroom wall under 125 VAC electrical outlet (!) to access valve. It was a B&B model 571 vacuum breaker, made of plastic, which had failed. Research on web tells me that these fail frequently.

Suggestions for replacement are Watts LF288A or Cash Acme V-101, reference http://www.jaycoowners.com/forums/f7/b-and-b-model-571-vacuum-breaker-flood-26776.html. 

I have ordered the V-101, and plan to relocate it when I install it.
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johnbryanpeters View Drop Down
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Posts: 8 		Direct Link To This Post Posted: 04 Oct 2016 at 11:58am
Just tried to flush the tank on my 2013 (2014?) RP-171; it had seemed to work before, this time pressure built up and the valve sprayed water. It seems I will have to cut a hole in the wall either in the sleeping area or behind the toilet to get at the valve. Grrr...

Notes:

1) The valve is both a check valve and a vacuum break. Its primary purpose is to prevent sewage from making its way back into the hose you're using to flush the tank.

2) As I spend more time using and maintaining this trailer, the evidence of sloppy workmanship is astounding.
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MysticLily180 View Drop Down
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Posts: 21 		Direct Link To This Post Posted: 08 Jun 2016 at 1:27am
thanks, Techntrek!
Mystic Lily
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techntrek View Drop Down
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Posts: 9059 		Direct Link To This Post Posted: 07 Jun 2016 at 8:25pm
Whichever is faster and/or easier.  

No such thing as a dumb question here!
Doug ~ '10 171 (2009-2015) ~ 2008 Salem ~ Pod instruction manual
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