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From: Peggie Hall (no email)
Date: Tue Jul 25 2006 - 19:12:33 EDT
Larry N. Brown wrote:
> When I contacted Ronco and Raritan, I discovered their "custom" tanks were
> just made from stock molds.
ALL rotomolded tanks are made from "stock" molds, Larry...unless you
want to pay a mfr to make a mold for you. Ronco will do that, but it's
cost prohibitive unless you're a boat builder who needs at least 20 of
the same tank. However, unlike "off the shelf" tanks, fittings can be
"custom" installed in a rotomolded tank in any sizes, locations and
quantity specified by the customer. You might argue that "customized
fittings" doesn't qualify as "custom tanks"...unless you've had to
struggle with getting plumbing to fittings in "off the shelf tanks or
leaks in DIY installation of "fitting relocation kits.
And fwiw, Raritan's tanks are made my Ronco, and are right out of the
Ronco catalog.
> Got hold of Triple M Plastics in Maine, a small firm that builds tanks for
> fire trucks, pest control companies and so forth:
> http://www.triplemplastics.net/ They estimated they could weld up the tank
> to my exact spec. out of 3/8 polypropylene for $220.00. That would include
> any number of reinforced, threaded holes for fittings. I wanted no holes in
> the bottom of my holding tank so I had one 1 1/2" threaded fill hole on top
> and two 1 1/2" drop tubes at $30 apiece additional. Per Peggy Hall's advice
> there are 2 x 1" NPT holes in diagonally opposite corners for 1" PEX vent
> hoses. According to Peggy, 18" is about the max height for passive
> ventilation which is the height of my tank. At the suggestion of the shop
> owner, I added a 10" cleanout so if I-ugh- have to, I can reach the bottoms
> of the draw tubes for cleanout. That was $20 extra.
>
> So, for about what I'd have to pay for a Ronco or Raritan "custom" tank with
> holes in the top, sides and bottom...
NOT with holes in the top sides and bottom unless thats' where YOU
specify 'em.
Ronco didn't have a molded tank that fit your space...so ok, you went
with a welded plastic tank. Although rotomolded tanks are preferable
because there are no seams that might leak, welded plastics tanks are
the next best choice--provided you get it from the right source (Triple
M Plastics is an excellent source), not from any local bozo who owns a
heat welder...'cuz the welds--and therefore the skill of the welder--are
critical, 'cuz welded seams are the only place a tank can leak.
Peggie
> ----- Original Message -----
> From: "Peggie Hall" <>
> To: <>; <>
> Sent: Tuesday, July 25, 2006 10:49 AM
> Subject: Re: T&T: Holding tanks
>
>
>> wrote:
>>> ...There are over 1100 molds for rectangular
>>> polyethylene tanks....
>> Ronco Plastics http://www.ronco-plastics.com has more than 400 shapes
>> and sizes, including over 100 that are NONrectangular. Their tanks are
>> top quality, thick walled (at least 3/8", which is 50% thicker than "off
>> the shelf" tanks), reasonably priced...and they install
>> fittings--including pickup tubes--in the sizes and locations specified
>> by the customer when they make the tank.
>>
>> In the unlikely event Ronco (no relation to the VegoMatic Ronco, btw)
>> doesn't have a tank that'll fit, there are at least two companies that
>> make good quality welded plastic tanks:
>>
>> Triple M Plastics: http://www.triplemplastics.net/
>>
>> SeaFab (formerly CC Tech): http://www.seafabtanks.com/
>>
>> --
>> Peggie
>> ----------
>> Peggie Hall
>> Specializing in marine sanitation since 1987
>> Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and
>> Other Sources of Aggravation and Odor"
>> http://shop.sailboatowners.com/books/detail-books.htm?fno=0&sku=90&cat=1304
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>
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>
-- Peggie ---------- Peggie Hall Specializing in marine sanitation since 1987 Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and Other Sources of Aggravation and Odor" http://shop.sailboatowners.com/books/detail-books.htm?fno=0&sku=90&cat=1304 _______________________________________________ http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering To unsubscribe send email to with the word UNSUBSCRIBE and nothing else in the subject or body of the message. Trawlers & Trawlering and T&T are trademarks of Water World Productions. Unauthorized use is prohibited.
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