I would hesitate to use fire below decks.
See my post above on stopping and sealing the crack.
Easy, permanent (I hope) solution.
Ed Collis
formerly ORION VII
NS30U
Toronto
I’ve never had that issue, my inspection ports have large “O” rings that keep them nice and tight.
When filling, it is not recommended to just stuff the hose down the filler as pressure can build up and cause damage. Also the overflow vent should be kept clear so the tank can breathe..
Cheers
Brian McCuaig. NS30u
Whitby, Ontario
“Having a Nonsuch is reason for being more cheerful than most."
The leak is at the bottom of the tank. The tank is now in my garage not in my boat. My plan is to try and plastic weld myself; if I’m lucky it might work and then I’ll know how to plastic weld. If not successful my fall back is to buy a new water tank. Or I might ask the boatyard for a repair e$timate.
If you plan to repair, make sure you drill that hole first as previously mentioned by a couple of people.
Joe Valinoti
S/V iL Gatto NS30U #221
Sea Harbour YC
Oriental, NC USA
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[/details]I am going to postulate that the crack was caused by over tightening the outlet fitting. Pipe fittings have a tapered thread. the more you turn the fitting, the bigger its diameter gets. This puts the tank fitting in tension.
The photo shows the crack extending at least as far as the rusty dimple. You need to drill Joe’s relief hole at least that far along.
To have a successful weld, I think you need to grind the crack the full depth of the tank wall. This includes around the corner and into the threaded outlet fitting. You need to weld full depth. You will need to get a proper size pipe tap to clean up the outlet threads when you are done.
There are shops that specialize in plastic welding. You might want to seek one.
The filler rod needs to be a near match to the material the tank was made of in order to make a permanent repair.
Ed,
Sorry, forgot to mention taking the tank off the boat to try welding it. Trying to weld it in the boat would be bad idea.
Bob,
Here is a link to Practical Sailor’s advice on welding plastic tanks.
https://www.practical-sailor.com/blog/repairing-plastic-water-tanks
Mark Powers
La Reina 26C
Vancouver, B.C.
Here is a link to a drawing of the N22 water tank. It says outboard model, but matches the dimensions of the tank in my inboard model.
http://www.venturesail.com/HinterhoellerDrawings/Nonsuch22/Nonsuch22Tanks19851018.pdf
Ron Weber
N22 #47
Guys -
So that we are really clear, we are discussing an N22, correct ?? One of the posts suggested that the capacity of an N22 tank (water or holding - they are identical) is 23 gallons. Nope. As the posted drawing shows, the capacity for both of these tanks is 14 Imperial or 16 U.S. gallons.
Hey … that’s the same as this Nauta eas-peasy nice and tasteless tank that I have been raggin’ on endlessly about. Well, how 'bout that, eh !!!
Imagine being able to drink all of that fresh tasteless water from a non-rigid tank that will outlast us all.
Ernie A. in Toronto
Ernie,
It was me that said the capacity was 23 gallons. I took the information from the 22 Brochure on the INA site. It list water at 23, diesel at 15 and holding at 23. All I can think is that you got smaller tanks so you could carry all the extra stuff. On board.
I find the best thing to do with tasteless water is to add a good single malt.
Mark Powers
La Reina 26C
Vancouver, B.C.
The leak/crack is between the inspection port fittings and the body of the tank. Fat O rings 2 O rings or no O rings, the tank still leaks when full. Solution is - right after filling we just empty a couple liters so the filler tube is empty and no more leak.
I’m sure new INA replacement tanks are great.
Tom
26C #28
Penetang
Here is some info on gluing poly…
https://www.christinedemerchant.com/coroplast-glue-test.html
Ever think of using that sealant stuff the guy sells on television?
Joe
NS26C# 156
Good suggestion, Joe. I just wonder if it would adhere to the poly??
Joe Valinoti
S/V iL Gatto NS30U #221
Sea Harbour YC
Oriental, NC USA
Apologies for the thread hijack, but a few notes back a few folks referenced INA replacement tanks. I’d like to find more information on these. I’m in need of a new port tank for a 1981 30C. Any help is appreciated!
Chad Demarest
–bluebird–
30C #105
Sagamore Beach, MA
Chad,
Log into the INA website and under the heading “Store” you will find a link to the Tank Replacement Program. All of the information is there.
Mark Powers
La Reina 26C
Vancouver, B.C.
Go to the INA website and all will be revealed.
Joe Valinoti
S/V iL Gatto NS30U #221
Sea Harbour YC
Oriental, NC USA
I appreciate all the good advice. I got an 80W plastic welding kit and went at it. Drilled a hole to stop the crack, widened the crack to get plenty of material inside, and put on layers of plastic material. Worked pretty well. Screwed the drain plug in hand tight so not
To over tighten and worsen the crack. . Didn’t know those plugs get wider - thanks for the heads up. Butch gave me some silicone sealer for the plug. It’s in my garage with no leaks for 4 days now. Thanks for all the good advice!
Good for you Bob,
Glad you do not have to buy a new tank. These boats are old but well preserved. Hate to buy a “new something” when the “old something” can be fixed. Of course I am cheap and don’t like to part with my funds.
That’s one of the big benefits of this forum. There is a wealth of knowledge out there willingly given to the rest of us. You read about it, took on the challenge and fixed it. You are now a source of knowledge for the rest of us. Good Show!
Thanks for sharing.
Cheers,
Butch
Butch Garren
Nonsuch 30, #196
Whiskers II,
Solomons, MD
Our 30C port tank had a leak. Pulled the tank out, found a lump of hull sticking up. Someone got lazy at Hinterhoeller. 35 years later, I ground down the lump (a handful of epoxy and glass). I got a cheap butane powered plastic welding kit from Princess Auto (the local discount tools and car and boat and house stuff store). Cut the edges of the cracks to get some depth and they filled quite nicely, just take your time and plenty of heat. Few years on and not a drop and of course no taste. If only the new anchor winch went in so smoothly…
Alan & Tracy, Corvus NS30C, Toronto BPYC