Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 14-07-2020, 14:50   #1
cruiser

Join Date: Mar 2019
Boat: A185F, Mystic 30’ Cutter
Posts: 713
Why not bladders?

Hey guys,

Got a question, by mystic has a bladder for fresh water, and a bladder for black water, fiberglass tank of diesel.

The bladders seem quite tuff, think they are French make, forgot the name, if they have a issue I can just empty them and roll them up, remove and replace, they pretty much fit the shape of whatever surface.

Is there a draw back? Seems like these would be the default answer to tankage unless there is something Iím missing?
__________________

NorthernMac is offline   Reply With Quote
Old 14-07-2020, 15:06   #2
Registered User
 
Mike OReilly's Avatar

Join Date: Sep 2011
Location: Good question
Boat: Rafiki 37
Posts: 8,436
Re: Why not bladders?

I had a water bladder in my previous boat. Worked great, but wasn't very large (100 litres perhaps). I've also researched diesel bladders as a possible solution to my aging iron tanks. Seems pretty viable.

One of the main challenges with bladders is chafe. They have to be securely mounted, but in a way that avoids all chafe. I think baffling is also an issue for big bladders.
__________________

__________________
Why go fast, when you can go slow.
BLOG: www.helplink.com/CLAFC
Mike OReilly is online now   Reply With Quote
Old 14-07-2020, 15:15   #3
Registered User

Join Date: Nov 2019
Posts: 1,698
Re: Why not bladders?

A water bladder works fine

Take care of them and they give a good service life

Stay away from fuel bladders

I can tell a pretty ferocious sea story about a fuel
Bladder rupturing at sea in a gale

It was a very bad trip

Donít go there
slug is offline   Reply With Quote
Old 14-07-2020, 15:25   #4
Moderator
 
JPA Cate's Avatar

Join Date: Nov 2011
Location: aboard, cruising in Australia
Boat: Sayer 46' Solent rig sloop
Posts: 18,965
Re: Why not bladders?

We had Vetus hypalon water bladders, they were original in our first Insatiable. They failed at about 20 yrs. along their aft seams (they fit under the settees). Their replacements, which were PVC and tedlar, failed at 3 weeks, and 2 weeks, along welds. Out of patience, as well as fresh water, we replaced them with s/s tanks, fabricated for us in NZ. It was one of the times we were glad we'd had the boss of the place measure the boat for them. We actually got them back to the boat before we realized he'd made two port tanks. He took the extra port one of them back, and made the starboard one, with only a little embarrassment, a good man.

One way to think about them, is "what happens if they leak?" I'm sure I'd not want to face a full black water breach, or even grey water.

Weighing that disagreeable job (the cleanup) against the convenience of the bladders, plus your boat's bladders have so far been reliable...and it's right down to a personal decision.

There are many plastic tanks made, and if you do a CF Custom Google Search on "plastic tanks + Peggy Hall", I'm sure you could find the ones she has posted links to. She says there is a wide variety to choose from, and her posts are reliable.

Ann
__________________
Who scorns the calm has forgotten the storm.
JPA Cate is offline   Reply With Quote
Old 14-07-2020, 16:12   #5
Registered User
 
chrisr's Avatar

Join Date: Dec 2016
Location: Australia
Boat: Tasman 40' catamaran
Posts: 568
Re: Why not bladders?

we had a fw bladder in a previous boat...never any problems

some friends of ours have just had their s/s diesel tank fail (probably 20yo ?). major job to cut the tank into pieces from under the cockpit and remove.

rather than incur the very high cost of re-building the boat to fit a new s/s tank, they are replacing it was a bladder. putting in a sponge rubber liner first

seems like a good option

cheers,
__________________
"home is where the anchor drops"...at Iluka / Clarence River until August... maintaining social distancing !
chrisr is offline   Reply With Quote
Old 14-07-2020, 16:38   #6
Registered User
 
cortezsailor's Avatar

Join Date: Feb 2011
Location: Cortez Island BC
Boat: Corbin 39
Posts: 198
Re: Why not bladders?

ATL marine fuel bladders are about the best . You can google not cheap but no issues with strength and durability . I agree most are cheaply made but I am
Impressed with this bladder
cortezsailor is offline   Reply With Quote
Old 14-07-2020, 16:40   #7
Registered User

Join Date: Aug 2016
Location: Long Island, NY
Boat: Cal 33-2
Posts: 213
Re: Why not bladders?

My last 2 boats had bladder holding tanks. The one one the previous boat was troublesome, with the vent getting plugged and other issues. I replaced it with a rigid plastic tank. The bladder tank on my current boat has worked fine.
__________________
S/V First Tracks
1985 Cal 33-2
JimsCAL is offline   Reply With Quote
Old 14-07-2020, 16:51   #8
Registered User

Join Date: Aug 2016
Location: ABC's
Boat: Prout Snowgoose 35
Posts: 1,613
Re: Why not bladders?

The Aussies seem more au fait with bladders.

The whole what happens if they leak is not more of an issue than all the leaking stainless or aluminium tanks we read about here. Various militaries around the world use bladders too. Just secure them and protect them against chafe. Pretty the mantra of everything on any moving vehicle. That however is easier said than done in some cases.
mikedefieslife is offline   Reply With Quote
Old 14-07-2020, 18:07   #9
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,061
Re: Why not bladders?

Bladders have several issues, they are sometimes used as fuel tanks in aircraft, but the preferred method is to seal the hundreds of rivet holes and use them as opposed to bladders.
Bladders can get wrinkles, these wrinkles are where you will find the water trapped that grows bugs and splashed over the wrinkles in rough weather to kill your engine, bladders also chafe and can wear though, and bladders have seams that can leak and come unglued or unwelded. Plus bladders deteriorate and need replacing.

SS rusts and often fails at the welds, aluminum corrodes, period, fiberglass can depending on the Resin not handle alcohol fuels etc.

The gold standard in my opinion is plastic, as long as it never gets exposed to UV, it has an almost infinite life. Whether fresh water, black water or fuel.
a64pilot is offline   Reply With Quote
Old 14-07-2020, 18:34   #10
Registered User

Join Date: Nov 2019
Posts: 1,698
Re: Why not bladders?

Quote:
Originally Posted by a64pilot View Post
Bladders have several issues, they are sometimes used as fuel tanks in aircraft, but the preferred method is to seal the hundreds of rivet holes and use them as opposed to bladders.
Bladders can get wrinkles, these wrinkles are where you will find the water trapped that grows bugs and splashed over the wrinkles in rough weather to kill your engine, bladders also chafe and can wear though, and bladders have seams that can leak and come unglued or unwelded. Plus bladders deteriorate and need replacing.

SS rusts and often fails at the welds, aluminum corrodes, period, fiberglass can depending on the Resin not handle alcohol fuels etc.

The gold standard in my opinion is plastic, as long as it never gets exposed to UV, it has an almost infinite life. Whether fresh water, black water or fuel.
For custom shapes aluminum works well

For production plastic tanks look to oceanlink or mueller , hundreds of oddball shapes
https://www.oceanlinkinc.com/marine-tanks/
slug is offline   Reply With Quote
Old 16-07-2020, 00:47   #11
Registered User

Join Date: Mar 2012
Location: Australia
Boat: 50' aluminium power cat
Posts: 118
Re: Why not bladders?

For an example, MV Dirona wrote about using on-deck bladders as long-range backup for their Atlantic crossing. Not something for everyday as it seems you're asking, but they can be stored below for when needed.
mcarthur is offline   Reply With Quote
Old 16-07-2020, 19:00   #12
Registered User

Join Date: Oct 2014
Location: Russell Island, Queensland, Australia
Boat: Adams 28, 8.7m
Posts: 60
Re: Why not bladders?

My vessel has had ss diesel and water tanks for 34yrs. I decided my diesel capacity
with 2 tanks, was more than adequate, so removed one, cut one side off, steam cleaned, re -welded, and refitted it as a water tank. An easy diy, job because they are ss. I would have lived with the too much diesel situation if they had been fabricated in anything else.
Patrigo is offline   Reply With Quote
Old 16-07-2020, 19:22   #13
Registered User

Join Date: Mar 2016
Boat: McCurdy & Rhodes Custom 46
Posts: 639
Re: Why not bladders?

Two boats ago I had a problem with bilge water. Couldnít find the leak. Water was not clear but not salty. Was a leaking black water bladder.
Boat had polyethylene water tanks and a monel gasoline tank.
My boat now has fiberglass water tanks and monel diesel tanks.
Polyethelylene for black water.
In your shoes if I could buy and fit a poly tank for black water I would.
dfelsent is offline   Reply With Quote
Old 16-07-2020, 19:50   #14
Registered User

Join Date: May 2019
Location: Kentucky, for now
Posts: 90
Re: Why not bladders?

Quote:
Originally Posted by dfelsent View Post
Two boats ago I had a problem with bilge water. Couldnít find the leak. Water was not clear but not salty. Was a leaking black water bladder.
Boat had polyethylene water tanks and a monel gasoline tank.
My boat now has fiberglass water tanks and monel diesel tanks.
Polyethelylene for black water.
In your shoes if I could buy and fit a poly tank for black water I would.

I really REALLY don't want to know how you figured out it was not salty . . .
BlueH2Obound is offline   Reply With Quote
Old 16-07-2020, 20:28   #15
Registered User

Join Date: Apr 2008
Location: NY
Boat: Baba 40
Posts: 817
Re: Why not bladders?

I like the idea of fuel bladders serving as an extra capacity on a long trip. I'd think better than the ubiquitous rows of 5gal fuel tanks tied to the liferail.
__________________

anotherT34C is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY flexible water bladders CGirvan Plumbing Systems and Fixtures 18 07-06-2015 00:01
Uses for Wine Cask Bladders Lagoon4us Off Topic Forum 3 11-11-2011 17:08
Water Bladders rubyjean Provisioning: Food & Drink 15 10-07-2011 20:35
Fuel & Water Bladders Dave in Eugene General Sailing Forum 5 28-12-2007 23:29
blackwater bladders craig Construction, Maintenance & Refit 0 10-03-2004 18:03

Advertise Here


All times are GMT -7. The time now is 23:11.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.