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Old 08-06-2006, 09:13 PM   #1
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1977 31' Excella 500
Colorado Springs , Colorado
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'77 Excella - Looking for Drain Valve

Just bought a 77 Excella 500 that I am starting to go through.
I want to clean out the fresh water tank but, I can't find the drain valve.

Help please..
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Old 08-06-2006, 09:23 PM   #2
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1977 31' Sovereign
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My 77 31 foot soveriegn does not have one. I simply have to run the pump till it is empty. Then I refill and repeat the process with a little baking soda or chlorox, depending how long it has been.
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Old 08-06-2006, 10:10 PM   #3
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Ditto on no drain valve. You have to pump it out. Seems kind of stupid for a trailer costing over $19,000 back in '77.
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Old 12-21-2007, 07:23 PM   #4
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1977 31' Excella 500
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I have a 77 Excella 500 both drain valves are in the door above the back bumper one is on the left it is the gray water and the other is on the right it is the sewage. The drain hose hooks up on the roadside at the rear bumper and the two drain valves have like a T handle you pull up on to open them they may also have a wire over the handle that is there to keep the valves closed while you are taveling , you may have to move these out of the way . Hope this helps.

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Old 12-21-2007, 08:10 PM   #5
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I installed one on my 1982 Excella there is a plug next to the line going to the pump I removed it and installed a nipple and hand valve.
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Old 12-21-2007, 10:27 PM   #6
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Mines's a center bath and the drain valve is in the pump cabinet.
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Old 12-22-2007, 05:54 AM   #7
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1977 31' Sovereign
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The original poster was asking about a drain valve for the fresh water tank. There is none for the 1977 31ft. model. There are drain valves for the water system in the back compartment on the road side for the hot and cold water lines. They do not drain the regulator (which is also located on the road side) in that compartment. There is a drain plug on the bottom of the regulator for this function. If you do not remove the water from the regulator, it freezes and cracks the bowl, and you have to replace the regulator the following spring. There is a drain on the water heater which I recommend you drain. You can also install a bypass valve on the water heater so you can fill the rest of the hot water system with antifreeze without filling the tank. There is no drain for the Par pump or the drinking water filter if you still have one. My suggestion is to take the filter element out of the filter and disconnect the pump intake and attach a tube which you can install on the pump and insert into the gallon bottle of anti-freeze and pump the system full of it by opening one faucet after the other. It takes about 2 gallons of anitfreeze to fill the system. You then need to add enough antifreeze to the remaining water in the fresh water tank (because the pump does not get out the last bit of water) to get it to not freeze in the weather to be expected. In Northern Illinois with its 0F temps. I usually use another gallon. The following spring we use a lot of water to flush out the tank as well as the chlorox and baking soda treatments to make the water acceptable.
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Old 12-22-2007, 11:45 AM   #8
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I can not believe there is no drain for the freshwater tank.
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Old 12-22-2007, 09:00 PM   #9
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Quote:
Originally Posted by Silverwanabe
I can not believe there is no drain for the freshwater tank.
Believe it, it's true. I had a '77 Excella 500 31' and I went through this about 7 years ago. Almost 4 years ago I found an '86 Sovereign 25' and it had a drain in between the wheels on the curb side.
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Old 12-22-2007, 11:56 PM   #10
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Thanks Dwight Di I wasn't aware about the regulator , and I still haven't found my filter,I think it might be under the sink ,but so far I haven't got the tambour open it's stuck.

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Old 12-23-2007, 10:14 AM   #11
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Robin,
The filter is under your sink mounted against the aluminum wall. Hope this helps.
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Old 12-23-2007, 01:33 PM   #12
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Quote:
Originally Posted by DesertRat
Just bought a 77 Excella 500 that I am starting to go through.
I want to clean out the fresh water tank but, I can't find the drain valve.

Help please..
According to the service manuals, there are drain valves.

Where they are located depends on a center bath or a rear bath.

Which one do you have?

Andy
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Old 12-23-2007, 05:01 PM   #13
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Dwight
Thanks
I also was not aware of a drain-plug in the regulator . Ill pull mine an see what I get . Id bet I already have a cracked reg.
Roger
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Old 12-24-2007, 05:53 PM   #14
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Thanks Craig and Andy.

Robin Stone
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