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Old 06-29-2016, 10:02 AM   #1
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1992 29' Excella
seattle , Washington
Join Date: May 2016
Posts: 20
What kind of freshwater tank to buy?

My 1978 sovereign was purchased without a freshwater tank. I would like to install one, but every time I search, I get "can of worms" results...too many options, water pump? etc.

I would like to get the largest capacity possible and be able to build a couch around it once it is installed.

Can someone please advise...

- what components would I need?
- do i need a water pump?
- estimate on professional installation in Seattle?

Thanks!
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Old 06-29-2016, 12:42 PM   #2
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2010 30' Classic
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South of the river , Minnesota
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You should be putting together a fairly typical install. No different than any other RV, present day to 40 years old.

Essentially you'll put in a plastic tank that fits the space, support and secure it, put in a fill and vent line that terminates through the wall, and then put in a demand pump connected to an outlet on the bottom of the tank. A gravity drain is also a good idea.

Any RV water pump will work. There are opinions on relative quality, and you can pay more and get a variable speed pump that will work a little better when you have two fixtures in use at once, say, someone showering while another person is washing dishes.

Like many RV jobs it's fiddly and time consuming but not difficult.
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Old 08-04-2016, 09:10 AM   #3
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1992 29' Excella
seattle , Washington
Join Date: May 2016
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help figure out dimensions

I bought the service manual in my perpetual search for a new fresh water tank.

There are no dimensions of the tank given in the manual; however, there are adjacent styrofoam pieces that I might be able to infer the size.

SO I'm thinking I will need 55"L x 27"w x 7" tall?

(see attached photo)
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Old 08-04-2016, 09:40 AM   #4
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2013 27' FB International
El Dorado Hills , California
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I had to replace the fresh water tank in my trailer because a weld broke. Got one at the Airstream dealer for about $200. From memory the tank was a big rectangle of similar dimensions to the ones you noted. A nice water pump is about $60. Typically 3 to 5 GPM is just fine. As the other poster noted, you just have to fiddle it in.
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Old 08-04-2016, 10:24 AM   #5
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1967 17' Caravel
Cadillac , Michigan
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Quote:
Originally Posted by stephseattle View Post
I bought the service manual in my perpetual search for a new fresh water tank.

There are no dimensions of the tank given in the manual; however, there are adjacent styrofoam pieces that I might be able to infer the size.

SO I'm thinking I will need 55"L x 27"w x 7" tall?

(see attached photo)
Vintage Trailer Supply has the tank for my Caravel which fits under the sofa. It should work for yours too. You could try them.
They are very helpful if you call too.
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Old 08-04-2016, 10:41 AM   #6
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1979 23' Safari
1954 29' Liner
Orange , California
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Steph,

In the 1970's trailers the water tank is under the floor between the axles. On my 1979 Safari it is 50 gallons and the pump is in the bathroom closet next to the water heater. I purchased a replacement from Inland RV.

Bill

Quote:
Originally Posted by stephseattle View Post
My 1978 sovereign was purchased without a freshwater tank. I would like to install one, but every time I search, I get "can of worms" results...too many options, water pump? etc.

I would like to get the largest capacity possible and be able to build a couch around it once it is installed.

Can someone please advise...

- what components would I need?
- do i need a water pump?
- estimate on professional installation in Seattle?

Thanks!
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1973 Dodge W200 PowerWagon, 1977 Lincoln Continental, 2014 Dodge Durango
1979 23' Safari, and 1954 29' Double Door Liner Orange, CA

http://billbethsblog.blogspot.com/
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