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Old 29-02-2020, 16:11   #1
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Rainwater Collection?

My trawler has 200sqft of roof. I want to collect water off it automatically. Simply construct a rim around the edge of the hardtop except at 2 low points where the water will drain off into some sort of gutter downspout into pipe/hose, and then thru a filter and right down into my cockpit deckfill.

Looking for recommendations as to what material/product i should use to construct the rim on the roof? (Whatever is the most economical option that will last.) I'm guessing 1inch high will be enough, or should i go 2in?
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Old 29-02-2020, 16:30   #2
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Re: Rainwater Collection?

Might work

Hard to think of an esthetic easy to apply gutter solution

In the old days ... before mobile phones and water makers ... we always captured water with our sun awnings

Rainwater was directed into a jerry jug then jug added to tank

The jug was needed to act as a dust dirt i insect trap to keep the tanks clean

I some regions like the Caribbean much useful water would be collected
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Old 29-02-2020, 16:34   #3
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Re: Rainwater Collection?

A lot of boats have the fill strategically placed at the bid beam need a gap in the toe rail. Let it rain for a while to clear the deck of bird poop, the. Open the cover and block the drain with a towel.... it doesnít work on my boat, I have to use my laundry tote...
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Old 29-02-2020, 16:47   #4
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Re: Rainwater Collection?

You could potentially use a PVC pipe and cut it in half, then screw it to your cabin sides. The outside of it can be painted to match whatever color scheme you want, they make spray paint that adheres to plastic now. If you want white, use lacquer thinner to remove the factory printing.
You can glue on end caps before you cut it in half (use a table saw) and maybe a "Tee" fitting too which will act as a downspout. Attaching it will depend on you roof edging.
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Old 29-02-2020, 16:52   #5
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Re: Rainwater Collection?

For clarification: I don't think i even need "gutters", i just need to install a rim on my hardtops. I'm talking about roofs, not decks, so it doesn't need to be aesthetically pleasing because nobody will ever see it.
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Old 29-02-2020, 17:01   #6
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Re: Rainwater Collection?

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Originally Posted by slug View Post
I some regions like the Caribbean much useful water would be collected
I've been debating watermaker vs collection. With all my roof area, 1inch of rain will yield at least 100gallons. Based on avg monthly rainfall in Miami, my 300gal of tanks will be overflowing at least half the year. And even in the driest winter months, the avg rainfall is about 2inches, so i think its worth a try before a watermaker, because auto-collection would require almost zero attention once built.
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Old 29-02-2020, 17:16   #7
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Re: Rainwater Collection?

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Originally Posted by SKMT View Post
My trawler has 200sqft of roof. I want to collect water off it automatically. Simply construct a rim around the edge of the hardtop except at 2 low points where the water will drain off into some sort of gutter downspout into pipe/hose, and then thru a filter and right down into my cockpit deckfill.

Looking for recommendations as to what material/product i should use to construct the rim on the roof? (Whatever is the most economical option that will last.) I'm guessing 1 inch high will be enough, or should i go 2in?
I have a water collection system on my hard dodger roof (although it is considerable smaller than your 200 sq ft roof). There is a lip around the edge of the dodger roof made of wood (like a moulding), which is epoxied in place. It was sealed with epoxy and then primed and painted. It is probably 1 inch high, which is plenty to contain water. The water is collected by 2 hoses that meet at a t-fitting and become one hose, which can be used to fill the tank or jugs. I think something like this would work for you. Simple and effective.
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Old 29-02-2020, 17:18   #8
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Re: Rainwater Collection?

How about something like this?

https://www.wilks.co.uk/marine/boat-...-profiles.html
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Old 29-02-2020, 17:23   #9
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Re: Rainwater Collection?

Plenty of options for adhesive backed gasket material.



here's an example.



https://www.mcmaster.com/93085k66
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Old 29-02-2020, 17:23   #10
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Re: Rainwater Collection?

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Yeah something like that, but i was hoping for a it to be something typically for household use so that i could buy it cheap at Home Depot. Will need about 60ft.
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Old 29-02-2020, 17:25   #11
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Re: Rainwater Collection?

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Plenty of options for adhesive backed gasket material.



here's an example.



https://www.mcmaster.com/93085k66
Yeah something like that. Thanks
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Old 29-02-2020, 17:25   #12
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Re: Rainwater Collection?

Home depot probably has something similar. I'd look at amazon.
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Old 29-02-2020, 17:25   #13
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Re: Rainwater Collection?

Vinyl quarter round from Home Store?
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Old 29-02-2020, 17:30   #14
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Re: Rainwater Collection?

No. The EPDM from my post.
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Old 29-02-2020, 17:34   #15
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Re: Rainwater Collection?

Ok, so my next question is what kind of in-line filter will work just with the gravity pressure, while draining fast enough that i'm not backing up water over the rim in a down pour? This water is mostly for showering and sh*ting in. If i'm cooking with it, its for boiling something. So it doesnt have to be immaculately pure, just wanna keep my tanks (and fresh water pump) free of debris.
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