I had heard of Ronco and Raritan "custom" tanks so I built a board out of CPES'd and painted 3/4" plywood to fit in the port side of my lazarette to contain my Lectrasan unit, the salt water injection tank(my Tecma toilets are fresh water), a dedicated gp 31 battery and the remaining space was to mount an approx. 35 gal holding tank. The board had 3/4" x 3" high glued and screwed on to keep things from sliding around. When I contacted Ronco and Raritan, I discovered their "custom" tanks were just made from stock molds. I'd have to adapt my design to their blanks but Id already constructed my board and I wanted my tank to FIT. 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 bottoms, I got exactly what I wanted for $300. UPS was around $80 Main to Louisiana. Regards. Larry Cigano, 47' Prairie Sundeck Lying Covington, LA ----- Original Message ----- From: "Peggie Hall" <peggie.hall@gmail.com> To: <rbrun360@aol.com>; <trawlers-and-trawlering@lists.samurai.com> Sent: Tuesday, July 25, 2006 10:49 AM Subject: Re: T&T: Holding tanks > rbrun360@aol.com 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 > _______________________________________________ > http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering > > To unsubscribe send email to > trawlers-and-trawlering-request@lists.samurai.com 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.

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" <peggie.hall@gmail.com> > To: <rbrun360@aol.com>; <trawlers-and-trawlering@lists.samurai.com> > Sent: Tuesday, July 25, 2006 10:49 AM > Subject: Re: T&T: Holding tanks > > >> rbrun360@aol.com 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 >> _______________________________________________ >> http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering >> >> To unsubscribe send email to >> trawlers-and-trawlering-request@lists.samurai.com 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. > _______________________________________________ > http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering > > To unsubscribe send email to > trawlers-and-trawlering-request@lists.samurai.com 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. > -- 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