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 Catalina/Capri 25/250 Sailor's Forums
 Catalina 25 Specific Forum
 Holding Tank Removal		  New Topic  Topic Locked
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txjustice101
Deckhand

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USA
2 Posts
Initially Posted - 07/16/2009 :  07:54:11  Show Profile  Visit txjustice101's Homepage
Howdy All,

I have searched the boards looking for information on holding tank removal, and while I found one that got close, I have yet to see an answer to my specific question. That is, what is the best way to remove the hard plastic holding tank on an '84 Cat 25? It seems fairly straightforward, except that it is "boxed-in" with a fibreglass partition. My first instinct is to cut the partition out, but thought I would first seek out the wisdom on this board to alternative approaches.

Thanks,
Scott
"Luck of the Irish" - Cat 25 TR FK #4321
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Prospector
Master Marine Consultant

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Canada
3159 Posts
Response Posted - 07/16/2009 :  08:08:08  Show Profile  Visit Prospector's Homepage
I remember reading someplace that Frank Butler designed the boats so that the tanks could all be installed/removed without damage to the hull liner.

I may also be wrong...
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Nautiduck
Master Marine Consultant

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USA
3704 Posts
Response Posted - 07/16/2009 :  12:45:37  Show Profile
If you took a heat gun to the tank could you get it to soften and then deform it to a collaped shape?
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DaveR
Master Marine Consultant

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USA
2015 Posts
Response Posted - 07/17/2009 :  05:54:31  Show Profile  Visit DaveR's Homepage
I think probably your first thought was right. I haven't dealt with this but ............ Is it just one side that's glassed in? And of course if you do cut it out remember fiberglass is some really nasty stuff, get a GOOD mask and a long sleeve shirt and long pants.
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redeye
Master Marine Consultant

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3476 Posts
Response Posted - 07/17/2009 :  06:38:09  Show Profile
The glass that covers the wood blocking is pretty thin IMHO. It is normally just one layer of mat and some resin over it. This joint to the inside hull is old and not that secure on my boat (1984) and a few of these have come out on their own. I've got one on one side of the bilge I need to replace and re glass.

Your boat may vary, depends on the diligence of the person laying up the blocking on that given day/year.
I've been looking at the same job. I've had problems with the tank filling from the deck when it rains. I added a back flow check valve in the vent line, but it just filled with water and now the tank is venting into the cabin. So I removed the check valve and I've got to reseal the vent line connection to the tank.

I'm going to look for another deck vent fitting that will not catch water off the deck.


Mine looks like I could pretty much knock out the blocking with a hammer and the matt cracks open the joint to the hull to come loose. After removing the in and out line fittings and the vent line you could move the tank aft. I don't remember nor did I measure to see if the tank could simply be pulled out of the seat openings.

Cutting the fiberglass joint to hull connections and sanding them is not all that difficult, you just need a mask, glasses, paper suit, and clean up is a lot of careful work. You want to get all the fiberglass debris cleaned up and out of the air. I'd think you would want to keep things small, small cutting blade on a drill.

Which replacement tank were you looking at?

Thank You.
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ed_spengeman
1st Mate

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USA
98 Posts
Response Posted - 07/17/2009 :  08:56:13  Show Profile
I have an 83 and took mine out, cleaned it and put it back. It's a strange shape and you need to unhook lines first. Not a big deal. Good luck.
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txjustice101
Deckhand

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USA
2 Posts
Response Posted - 07/17/2009 :  09:06:59  Show Profile  Visit txjustice101's Homepage
Thanks all for the replies. Very helpful. Re the replacement, I believe Catalina Direct has a model that should work, but any comments on that would be welcome as well.

Looks like it may be a good weekend here in North Texas to get on the water (low to mid 90's)- it's been averaging over 100 for the past 9 or so days. Hope everyone else has a great weekend as well!

Scott
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.