New freshwater tank for Trillium 4500 - Fiberglass RV
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Old 02-04-2021, 08:30 PM   #1
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Name: Susan
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Manitoba
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New freshwater tank for Trillium 4500

Help, please! I'd like to replace the 41 year old freshwater tank on my 1979 Trillium. Ideally looking for a BPA-free, approx 12 gallon tank, with these dimensions: 27.5" x 18" x 5.5". The new tank could be up to six inches longer, and up to 1.5" wider - but *no* deeper. I've looked far and wide - anybody have a source for replacements?
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Old 02-04-2021, 09:19 PM   #2
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Name: Rod
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I've found a good selection of tankage at National Tank Outlet, ntotank.com. And also on Amazon! Both have fresh water, grey water, and even black water tanks in many different sizes. I'm replacing the 12 gal. fresh water (with a leak somewhere) in our Scamp with a 20 gal tank that's just a little bit longer, a couple inches wider and the same height and should fit in the same area. Good hunting.
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Old 02-05-2021, 08:37 AM   #3
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Quote:
Originally Posted by SusanP View Post
dimensions: 27.5" x 18" x 5.5".

Which is the Width, Length and Height?
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Old 02-05-2021, 09:11 AM   #4
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The Trillium 4500 original tank is 27.5" long by 18" wide, and has a depth of 5.5". I can add up to six inches in length (to about 33.5"), about 1-2" to wideth (to about 19-20" wide), but the depth of 5.5" is fixed and firm, given the floor. I'm in Canada (the middle!), but am happy to pay for shipping anywhere in North America. Really hoping for some solid leads from current owners - I went down the Amazon rabbit hole without any success!
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Old 02-05-2021, 09:20 AM   #5
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"33.5 long by 19-20" wide by 5.5" deep MAX"


You can go here: https://www.ntotank.com/rv-fresh-water-tanks
and click on "Height" to sort by height.


This is as close as I've seen to your dimensions. A 10-gallon tank:
32" Length x 19 1/2" Width x 4 3/4" Height
https://www.ntotank.com/10gallon-ron...-tank-x8898393
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Old 02-11-2021, 06:05 PM   #6
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Thanks!

Thanks - fingers crossed that they will ship to Canada. The problem seems to be that our Trillium tanks are so blasted flat (under 6") - making them a peculiar niche market item.
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Old 02-12-2021, 12:31 PM   #7
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Shirlon Plastics in Cambridge ON.
they used to make a huge variety of tanks, They might still have an online catalogue, I got a black and a grey off the shelf, with outlets put where I needed them
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Old 03-27-2021, 08:52 PM   #8
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Final outcome

Hello all - I ended up getting the good folks and D&M Plastic, in Alberta, to custom-make a freshwater tank (about 43 litres), which they shipped to me in Winnipeg. Altogether, it ended up costing about $450 - which seemed a fair price in order to be able to have an independent water supply.
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Old 03-31-2021, 01:01 PM   #9
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Susan, how much of the $450 was shipping?

Did you get them to install a marine deck fitting to make cleaning possible?
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Old 03-31-2021, 01:11 PM   #10
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Hi Dave - My total bill from the good folks at D&M Plastics (Alberta) was $478.32, inclusive of all taxes. Shipping costs (pre tax) by Canada Post were $47.14 (to travel two provinces over.) I don't know what 'marine fittings' are - so expect the answer to your second question must be 'no'! I do anticipate annual cleaning of the water tank and lines using some non-toxic cleaners.
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Old 03-31-2021, 03:28 PM   #11
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Name: Dave W
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Susan, The fitting I was referring to would be better described as an inspection hatch:
https://www.amazon.ca/Hoffen-Hatch-W.../dp/B07PQ7C1R7
Click image for larger version

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Several people have installed them on the top of their water tanks. They make scrubbing the inside of the tank possible. The position at the top of the tank would mean that the deck plate is not in contact with the water very much, so leaks are not likely. However, it should be noted that the deck plate is not rated for use with drinking water, though ABS plastic is commonly used in potable water service.
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