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Old 08-31-2015, 06:35 PM   #1
CRH
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1995 25' Excella
xxxxx , xxxxxx
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Replaced Thetford Waste Valves on 1995 Excella

I discovered both valves leaking. I cut an access panel and could see the black tank adapter was cracked and the gray was leaking from the seal between the valver and adapter. Vintage Trailer Supply had new valves and adapters to me in 2 days. I pulled everything apart and found the black adapter was broken in two at the flange. The piece stuck in the tank was a bear to get out. I went to Lowes and got a Y, a 90 degree valve, a coupling and a section of pipe. Getting everything back in was a wrestling match and had to be attempted more than once. I got it done, filled both tanks and no leaks. The project set me back 167 bucks.
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Old 07-05-2016, 01:49 PM   #2
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1991 25' Excella
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I too have a leaky gate valve on the waste tanks. I intend to service or replace the original valves on my 1991 Excella 25

My question, Did you cut an access hole? Or did you drop the pan?
If you cut a whole what are the dimensions of your cutout?

Re read your original post, I see you did cut a hole.
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Old 07-05-2016, 01:53 PM   #3
CRH
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1995 25' Excella
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I made a cover for the hole out of a scrap street sign. Now, inspection or service is easier.....Airstream shouldn have put in an access panel to begin with.
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Old 07-05-2016, 01:58 PM   #4
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1991 25' Excella
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Quote:
Originally Posted by CRH View Post
I made a cover for the hole out of a scrap street sign. Now, inspection or service is easier.....Airstream shouldn have put in an access panel to begin with.
I like the street sign fix..LOL

But how big of access hole did you cut?
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Old 07-05-2016, 02:02 PM   #5
CRH
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1995 25' Excella
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I don't know the measurements off the top of my head. I drilled a small hole and cut a little bit bigger hole with snips to see where the valves where. I used electric shears to cut the access hole. It wasn't square or rectangular. I only cut enough to get the valves out.

The street sign cost me 8 bucks at the recycler. A piece of aluminum half as thick was 40 bucks at Lowes.
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