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General Discussion of preventative/corrective maintenance and other technical issues regarding your coach that are not covered in other Mechanic's Corner categories (ex. refrigerators, water heaters, and compressors).

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  #11  
Old 03-19-2018
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NoGas NoGas is offline
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Default Alternative with No-Stick Valves

Sorry Randy/Stephen - I grew tired of the always sticking Dupree valves. Had already replaced both paddles and they were still sticky. Plus, it seemed like I was always lubing them with HF silicone. So ordered dual valve Y by RV industry standard Valterra for $62. Problem/sticking paddles are now just a fading memory and the valves operate much easier. Inexpensive replacement parts and simple 4 nut valve access convinced me. Smaller valve pair gives more room so am considering addition of 3rd valve, which would allow combining the tanks when boondocking. New install allowed me to position clear downspout directly over enlarged deck plate opening to monitor dump “progress”. Valterra also makes electric valve model for more $$. Ordered a new 2-part 20’ slinky hose and purchased both from etrailer.com for less than Amazon.

https://www.etrailer.com/RV-Sewer/Valterra/T84.html
https://www.etrailer.com/RV-Sewer/Valterra/T58.html
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Last edited by NoGas; 03-19-2018 at 11:51 PM. Reason: Added links
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  #12  
Old 03-20-2018
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I put in Drain Master 12v valves so I could dump on either side. Also put a 3rd one in the middle so can dump just the grey water if I want to.
Nice to be able to push a button inside and see it dump.
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  #13  
Old 03-20-2018
rrueckwald rrueckwald is offline
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Quote:
Originally Posted by Bluebird Bob View Post
I put in Drain Master 12v valves so I could dump on either side. Also put a 3rd one in the middle so can dump just the grey water if I want to.
Nice to be able to push a button inside and see it dump.
Bob,

Are both of your Drainmasters upright? Do you have switches both upstairs and at the bay? Do you have to disassemble them periodically for cleaning and lubricating? I've been thinking of doing that.

Our grey tank requires one horizontal which Dranmaster doesn't like. Valterra's electric valve might work.
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  #14  
Old 03-20-2018
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Its not a problem on my part,i sold that product to Stephen years ago.
I have nothing to do with it now.
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  #15  
Old 03-20-2018
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I put new paddles in when I bought the 97 bird 7 years ago, I have never had any problems. The 93 bus I never touched the valve all the years that I owned it. I did have the air fittings and the air switch go bad. Maybe the hold up because I use them a lot since we fulltime.
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  #16  
Old 03-20-2018
Jim Brookshire Jim Brookshire is offline
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I have had or added a third valve to each of the coaches we have had over the last 17 years. Provides additional protection and allows better flushing of the black tank with gray water. Valterra valves have worked well. I’m with Thomas however, don’t think I have changed or lubricated more than a half dozen valves Dupree valves in all that time.
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  #17  
Old 03-20-2018
mrkane mrkane is offline
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As usual, a 30 minute plumbing job turned into hours plus a visit to the store.

The spring grabber didn't have enough grip.



Fortunately, a scene like that in the RV movie was avoided, even though the rubber seal had fallen out. Second bit of luck---it was the gray tank, which is close to the external hose port. Also, I had previous experience servicing the valves, and had two spare paddles on hand.

Using a drain snake from the hose connection couldn't move the rubber along the pipe---and it wasn't clear that pushing it into the holding tank was a good idea. However it did tip the disk so the edge was visible in the valve body opening. The coat-hanger wire was not stiff enough to either punch into the disk to work like a corkscrew, or hold a bend to hook it out.

Using the pistol-grip pliers shown above, in combination with the awning hook I moved the seal to the outlet side of the valve. Then it was possible to grab it with the double-jointed piers from the hose connection port.

BTW, on my coach there isn't sufficient clearance to remove the air cylinder with the paddle attached. Rather the control rod must be unscrewed from the paddle in order to tip the cylinder through the doorway in the coach body. The black tank valve on the other side of the coach has just enough clearance to pull the valve guts through the opening in one piece.

Thanks for the suggestions, and Randy, you missed a chance to tour scenic Elmo TX.

--M.R.Kane
1987 PT40 'Sleipnir'
currently near Elmo TX
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  #18  
Old 03-20-2018
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Quote:
Originally Posted by mrkane View Post

BTW, on my coach there isn't sufficient clearance to remove the air cylinder with the paddle attached. Rather the control rod must be unscrewed from the paddle in order to tip the cylinder through the doorway in the coach body.

--M.R.Kane
1987 PT40 'Sleipnir'
currently near Elmo TX



So how is the paddle changed on the grey tank?
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  #19  
Old 03-28-2018
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Bump.

I have only changed black, no issues with grey. I know I can't pull grey with paddle attached as well.
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  #20  
Old 03-28-2018
bubblerboy64 bubblerboy64 is offline
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Seems like you handled that well. Trick I believe is keeping on top of the cleaning and lubrication. I can't figure how that paddle came off the frame but it must have been stuck tight as a bugger. Like most projects getting to the area that needs attention and having the necessary tools. Good job. No blood or other bodily fluids in the area so it ended well.
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