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ADD FORWARD 38-US GAL. WATER TANK TO LATER COACH.
Author: andy1canada (Show all albums)

IMHO: for it's attributes there are also a few shortcomings with these coaches; including, a rather modest potable water carrying capacity.

One way to remedy this on the later coaches - IF YOU ARE WILLING TO OR ALREADY HAVE DITCHED YOUR AUTO-A/C FROM YOUR COACH - is to rip out the fans & condenser's etc from the lower forward compartment to make room for another tank. Water is super-heavy, too, and the extra weight forward can even improve handling some. I'm posting this to show that it can be done - but I urge any who'd venture to go here to give it careful consideration before proceeding. The photo album will take it from here. Terry #846

NOTE: My tank has failed after little service. I wish anyone better luck than I had should they/you venture to do this work on your own. Perhaps a longer apprenticeship in plastic-welding may have proved fruitful. Terry #846


PLAN 'B'... the 'practical' compromise.

Okay, update on my failed forward tank-build. I found an outfit in Alberta, Canada, that does roto-molded tanks and they have a 32 US/gal (26.6 Imp) tank that will fit easily into the forward tank compartment, or, in the later coaches, into the A/C machinery compartment once you tear it all out.

This tank comes with (in my case) 4 - spin welded fittings ready to hook up.

It's only about 6 gals less than the OEM 38 gal jobby that came with these coaches.

The slightly smaller size also translates into more room for thicker insulation around the tank, which is useful for us 'Northern-dudes'.

I'll have it here next week and will update the thread.

Here's the kicker: They are shipping it to my door as described - 500 miles as the crow flies - for: $349.54 (CDN) all in!

Wish I'd gone this route from the get-go. Live... learn.

See: the RFW1003 - https://www.dmplastics.ca/products/rv-tanks.aspx

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Designed some baffles...


Watched all the Youtube videos, read all the online advice & tutorials, set up a decent flat work surface and had at'er.


Got me a hot-air welder, a 4x8' sheet of 1/4" HDPE, a bunch of 3/16" x 3ft. wht. HDPE welding rods,bucked out all the pieces on my table saw and with the scraps I welded up this contraption to see if my very first corner-weld would hold water. Well, it did... for 3 days till I dumped it out, then satisfied my plastic welding apprenticeship was successful. What a pile of shit that notion turned out to be.


I decided to learn to do plastic hot-air welding to build my own tank. If anyone decides to follow along and make their own tank - THEY DO SO ENTIRELY AT THEIR OWN RISK. This post in no way is intended as an instruction publication on how it should be done. It's merely my account of how I did it and the issues I encountered.


Here's one of the early forwards tanks I got from buddy, Jay, in Wa. along with the housing a few yrs back. Fittings on this one leaked badly and regardless of my best efforts to weld them up to stop the leaks I was unsuccessful and had to toss it. I would learn later that 50-ish year old HDPE simply isn't worth the time or trouble to repair and expect any useful service out of it. I'm posting some dimensions here as well for future reference.


On the early coaches you got a 38 US gal forward tank beneath and forward of the front spring. This is the fiberglass housing that encased the tank and insulation around it. If you can get one of these somewhere it'll make your job easier... sort of. I ended up making my own tank and elected to make it 1/2" or so taller which necessitated getting rid of the upper lid which then didn't fit.
 
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