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 Post subject: Is my i11s air leak
PostPosted: Thu Aug 24, 2017 7:19 am 
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Posts: 26
I inflated my i11s and left it for few hours and when I came home I found out the middle floor is soft. I left the all three valve covers open when I left home. My question is when I left the valve cover open, will the air will go out from the valve?but the left and right side is still fully inflated even both valves covers were open.
Then I fully Inflated the middle floor again and left it for another one and half hour with the valve cover closed and seems ok then I deflated and put it back to the bag.
Any inputs and thanks


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 Post subject: Re: Is my i11s air leak
PostPosted: Thu Aug 24, 2017 8:09 am 
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I've had both side chambers leak while keeping my i11s lightly inflated, stored flat on a table. This only occured when the valve caps are unscrewed. I too wonder if the valve cap keeps air in? No issues on the water for 9+ hours, but obviously my caps are closed on the water.


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 Post subject: Re: Is my i11s air leak
PostPosted: Thu Aug 24, 2017 11:11 am 
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Joined: Sat Aug 16, 2014 4:00 pm
Posts: 452
How about tightening the valve with the valve wrench included in your patch kit? I believe my i12s came with that... otherwise you could put soapy water on it to see if you need one. On videos for rubber dinghy leaks, they said the valves are the top source of air leaks, and to tighten or replace.

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My Hobie i12s... sailboat in a suitcase!


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 Post subject: Re: Is my i11s air leak
PostPosted: Fri Aug 25, 2017 4:00 pm 
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reason162 wrote:
I've had both side chambers leak while keeping my i11s lightly inflated, stored flat on a table. This only occured when the valve caps are unscrewed. I too wonder if the valve cap keeps air in? No issues on the water for 9+ hours, but obviously my caps are closed on the water.



That's means close the valve caps should prevent air leak?


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 Post subject: Re: Is my i11s air leak
PostPosted: Sat Aug 26, 2017 5:17 pm 
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crappie wrote:
That's means close the valve caps should prevent air leak?


So far that's been the case; if it's leaking with the caps closed I cannot detect it with standard soap test...

What I want to know is if the silicon/rubber seal on the valve caps is actually holding air pressure in, or if the caps in the closed position keeps the spring pin in a certain position so as to not leak air. I hope that makes sense.


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 Post subject: Re: Is my i11s air leak
PostPosted: Thu Sep 21, 2017 9:40 pm 
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reason162 wrote:
I've had both side chambers leak while keeping my i11s lightly inflated, stored flat on a table. This only occured when the valve caps are unscrewed. I too wonder if the valve cap keeps air in? No issues on the water for 9+ hours, but obviously my caps are closed on the water.

Thank you for that surprising insight. I just noticed my Aquaglide repair kit contains 2 beefy substitute caps with plush gaskets and not even thumb flanges but large screwdriver slots (still bayonet locked). It has a hole to prevent pushing in the spring pin which could only increase a leak. With my exasperating history with Aquaglide, I can guess this is not so much from foresight but bitter experience of customers with leaks with both levels of their valve.

If you think about it, the main spring valve is inherently vulnerable to particles holding a slight gap in the seal. The twist cap can give a more positive backup. But for stored yaks, maybe a slight leak is good for the hull seams. Now for a digression that probably doesn't apply to the i11s skeg mount, unless Hobie copied the very unfortunate world standard for phillips board fin screws.

Dear Aquaglide, please switch to No Tool Stainless Fin Screws: Image

Why? Because they are stainless steel rather than your insta-rust phillips screws. Because they don't require a screwdriver to be kept near the puncture-vulnerable inflatable. Because they have a soft O ring so you can apply gentle pressure, line up the head, and not have such slot-bruising time unscrewing both of them.

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 Post subject: Re: Is my i11s air leak
PostPosted: Fri Sep 22, 2017 9:18 pm 
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daft wrote:
beefy substitute caps with plush gaskets and not even thumb flanges but large screwdriver slots

OK, plainly those are childproof / renter-proof caps; PVC glue fumes must be affecting me. My Aquaglide seams didn't withstand their recommended 10psi, and the company says complain to the seller 11 time zones away.

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My Hobie i12s... sailboat in a suitcase!


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 Post subject: Re: Is my i11s air leak
PostPosted: Wed Sep 27, 2017 8:37 pm 
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To test my clumsy seam repair, I tested the hull holding 10 psi for about an hour. With the cap on it lost virtually no pressure according to the Sevylor pump gauge, which is precise (if not accurate) to about 0.05 psi. Yippie! With the cap off there seemed to be a tiny trace of pressure lost.

I attribute this loss to the inner spring valve simply "clapping" together, sometimes hanging up on minute particles. The outer cap would grind any such particle in the twistlock action, to at least be oriented to the flattest position.

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My Hobie i12s... sailboat in a suitcase!


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 Post subject: Re: Is my i11s air leak
PostPosted: Mon Dec 04, 2017 9:01 am 
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Joined: Fri Dec 01, 2017 8:05 am
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The valve cap is not provided to keep air in... it is there to keep debris out so the valve seal is not compromised. If you have a chamber that is not holding pressure - cap or no cap - over a short time frame, a repair of some sort will be necessary.

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