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Old 08-27-2019, 08:49 PM   #1
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1983 31' Airstream310
Hillsburgh , Ontario
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waste water valves

I haven't posted about our trip out west, and I will eventually, but need some assistance.

My blackwater tank is now leaking past the shut off, (nice surprise); I looked at the Classic stickies to find information on what type of shut off they are, but couldn't find out any info.

Camco sells a three inch shut off valve at CT, link below. Will they work or not?

https://www.canadiantire.ca/en/pdp/r...-0408303p.html

Cheers
Sidekick Tony
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Old 08-27-2019, 10:27 PM   #2
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1988 25' Excella
1987 32' Excella
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The trailers from that era use Thetford valves. I do not know what the MH used. Available from Amazon and from Outdoors Mart. I ordered mine from Outdoors Mart since I knew they would have the right one.
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Old 08-28-2019, 12:42 AM   #3
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1982 28' Airstream 280
Port Angeles , Washington
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I think the originals were Thetfofd, mine were white body and larger in physical size than the Valterra or Camco, the drain hose connection was also larger. I changed mine to Valterra as they are about 1/3 the cost and much easier to find. The spring lock clips on the T handles are Thetford but the tread on the shaft is the same as the Valterra.

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Old 08-29-2019, 06:54 AM   #4
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Tony, I did this job last winter, I'll dig up what info I have (buried somewhere in my thread?

Not fun, but all things considered not a terribly difficult job
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Old 08-29-2019, 08:13 AM   #5
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1981 31' Excella II
New Market , Alabama
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Get one of these for emergencies. These are life savers. Do you have a center bath or rear bath. I ended up using the old Thetford valves since I have a center bath and things are shoe horned in there pretty tight.



https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1


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Old 08-29-2019, 09:30 AM   #6
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Page 32 of my thread begins documenting the fun I had with this

http://www.airforums.com/forums/f311...178802-32.html

Tl;dr, just order this
https://www.etrailer.com/RV-Sewer/Valterra/T84B.html

The old ones are held in with a hose clamp and vulkem, disassemble and crawl under with a heat gun to work them out, installation is the reverse of deintegration

The parts that slide into the tanks are 3" spigots, i ended up with hardware store fittings between the two valves but I think the linked fitting would have saved me time and money
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Old 08-29-2019, 10:20 AM   #7
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1981 31' Excella II
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Here is my adventure. The Thetford flanges were already there so it was easier to replace same with same especially since my tank pans were not coming out unless I broke every bolt holding them up.



http://www.airforums.com/forums/f444...th-109487.html


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Old 08-29-2019, 11:24 AM   #8
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Huh, a PO must have changed things a bit. I have LaSalle Bristol 3" waste valves. I've order 2 replacements.
I should be able to loosen stainless steel screw ring clamp on tank side; undo four bolts holding waste gate in, remove and insert new waste gate, and bolt everything back up.
This is where I should do a Mayco and say "easy peasy"; shouldn't take 10 minutes. But I know better than to say that.
Bought two new valves with seals and bolts for $61 and change, Canadian, delivered.
I"ll let you all know how it goes.

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