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Go Back   SailNet Community > On Board > Gear & Maintenance > Water tank replacement options
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Thread: Water tank replacement options Reply to Thread
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Topic Review (Newest First)
10-08-2007 11:11 PM
Valiente That's probably coming tomorrow. They did an interesting article on "best diesel tank material", but that's not the current question.
10-08-2007 10:15 PM
Freesail99 Practical sailor did a report on bladder tanks in this months issue.
10-08-2007 10:04 PM
RandyonR3
Bladders

I know they get a bad rap but I've got a series of 50 gal Plastimo tanks in my boat. The origional tanks were bladders, on my FIRST 42. the boat was designed for all-out racing so the bladders made perfect sence, but this racer has turned cruiser and the tanks were replaced. I found the easiest and least expensive was the Plastimo Bladders. They are probably the easiest to install as you just roll them out and fill them up, and they settle into the boats contour.
I havent really worried about how clean they are as I'm one of the most picky people when it comes to water in my tanks.. Nothing goes into the tanks that hasnt been run through a series of filters including a carbon 5 micron.
I have to as my watermaker (spectra) has a clean water electronic flush where every 90 hours, it flushes the system with tank water. If I had any type of crud in the tanks, including bleach, or clorine, I'd destroy my system.
You might want to check them out..the price is right.......
10-08-2007 01:25 PM
sailingdog I'd second what US27inKS said. HD is much less expensive.
10-08-2007 12:54 AM
US27inKS I've used some of those plastic fittings. Make sure your lines are cut square, and push the lines all the way into the fitting. Otherwise they are fabulous. You can assemble the plumbing on your boat in minutes. There is actually a marine plumbing supplier offering these, but I can't remember who. Stick with the Watts brand. Better to pay the HD price than the WM price.
10-08-2007 12:32 AM
Valiente Thanks for all the suggestions, people: bladders were suggested to me by a boat repair guy, and they were but a passing fancy.

Plastic tanks of the HDPE variety might be nice and I concur that four 50 gallon tanks make considerably more sense. There's no reason I can't have inspection ports and the stand-offs, bracing and strapping are simpler with a smaller tank as long as I eliminate any chance of chafing or friction.

I would do a fibreglass keel tank, but these are not keel tanks, but "either side of the engine bay" tanks.

I'll throw out another question: What do people think of the new(ish) snap-together plumbing fittings for marine use, given the low pressures involved and the tendency of hoses to discolour and get grotty?

Here's an example of what I mean: it strikes me that from deck fill to tap, the less metal I have the better, which is the opposite of how I feel about through-hulls and fuel manifolds.

http://www.globalspec.com/FeaturedPr...Valves/46269/0
10-07-2007 03:31 PM
Rockter I would avoid bladders unless you really must. I found it difficult to keep the water fresh.
10-07-2007 03:28 PM
USCGRET1990
Quote:
Originally Posted by sailingdog View Post

Another option is to have fiberglass tanks made. They can be made custom to fit your boat, and may be a better choice in terms of strength, weight and longevity.
I agree with this as well...in that it is a design issue, you might want to bounce it off these folks, as some of them are builder/designers and quite knowledgeable:

http://www.boatdesign.net/forums/sea...archid=1086045
10-07-2007 03:18 PM
sailingdog Rigid plastic tanks are probably the best way to go. I would recommend four tanks, since it would provide better protection against contamination, and allow you spread the load out more for ballast purposes.

Another option is to have fiberglass tanks made. They can be made custom to fit your boat, and may be a better choice in terms of strength, weight and longevity.
10-07-2007 03:15 AM
Sailormann Plastic - or if you're feeling rich - Monel. Plastic will absorb a bit of taste but it dissipates quickly. Monel lasts pretty well forever. Stainless will eventually corrode. Bladders are standard equipment on MacGregors.
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