Rainwater Catchment....... - SailNet Community
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post #1 of 13 Old 07-09-2013 Thread Starter
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Talking Rainwater Catchment.......

Ok Weird project department.....My new boat berth does not have a close hose bib so have acquired a salt/fresh pump set up. I can wash down with salt water and then.....how bout some ideas on onboard rain catchment to collect a bladder full of fresh when available.....ideas, sketches welcome!
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post #2 of 13 Old 07-09-2013
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Re: Rainwater Catchment.......

Rain catchments are always handy, but in your case I would get a really long hose rather than wash down with salt water.
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post #3 of 13 Old 07-09-2013 Thread Starter
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Re: Rainwater Catchment.......

Hi Mike
I would only use salt water wash down for general dirt.... not on blocks etc
But yeah the long hose does look likely
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post #4 of 13 Old 07-09-2013
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Re: Rainwater Catchment.......

An easy rain catcher is just a tarp strung up in the rig w/ a thru-hull in the lowest point and attach a hose. I would not recommend catching water for human consumption in metropolitan areas, because of the pollution, but as it seems you only want it for washing down, so this should do. But don't run it into your tank(s), use a jerry can.
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post #5 of 13 Old 07-09-2013
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Re: Rainwater Catchment.......

On Orion we have screened drains in the deck at it's lowest point, P&S, which lead below to a two-way valve. One way drains the deck water to the cockpit and out, the other way to a hose which can be put into any of the three water tanks.

After posting this I found a note from a boat "Atom" with this setup installed, complete with sketches. Nice job, Atom.

Last edited by keforion; 07-29-2013 at 02:13 PM. Reason: new info.
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post #6 of 13 Old 07-09-2013 Thread Starter
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Re: Rainwater Catchment.......

Thanks Capta simple is good. Think ill try a tarp and bladder set up first But I could see having a simple deck catchment could be great for washwater bladder. Clever when cruising.
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post #7 of 13 Old 07-09-2013
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Re: Rainwater Catchment.......

It took me 6 months to figure out that's what the thru hulls in my deck were for.
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post #8 of 13 Old 07-09-2013 Thread Starter
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Re: Rainwater Catchment.......

Shinook,
It would have stumped me too but thinking about it after my postin
It occured to me one drain at the end of each washboard (deck) could collect quote abit of rain...think it woll be fun to study thos awhile
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post #9 of 13 Old 07-09-2013
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Re: Rainwater Catchment.......

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Originally Posted by oysterman23 View Post
Shinook,
It would have stumped me too but thinking about it after my postin
It occured to me one drain at the end of each washboard (deck) could collect quote abit of rain...think it woll be fun to study thos awhile
It was one of many mysteries on my boat when we got it. They have been on the boat a long time, but I couldn't figure out why. What really threw me off is that the tube on one of them dumped onto the battery box, which obviously wasn't correct.

I was reading a book recently that talked about rainwater collection and had diagrams for a rather intricate collection system based on installing thru hulls on upper decks. That's when it hit me what they were for. The PO must have cut the pipes for the collection system, resulting in the water dumping directly on the battery box.

On our boat, they are very effective, I can gather a good bit of water if it rains, but placement is important. You also want a way to shut off collection. I haven't done it yet, but I'm going to install valves on both of the thru hulls so I can shut them off when we aren't trying to collect the water.
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post #10 of 13 Old 07-09-2013 Thread Starter
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Re: Rainwater Catchment.......

Yeah I agree cutoffs are essential...thanks for the ideas
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