Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 26-12-2007, 05:38   #1
Registered User

Join Date: Jul 2005
Location: Wherever HP takes us
Boat: 1974 Challenger 40 Ketch, Holding Pattern
Posts: 107
Rain-Catcher Design

We've been looking into a new design for a rain ratcher/way to divert rain into our tanks. If you have suggestions/designs we'd love to know.

Brian & Heather

S/V Holding Pattern
Brian & Heather
Follow our adventure at
Holding Pattern is offline   Reply With Quote
Old 26-12-2007, 07:13   #2
Senior Cruiser
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Somewhere along the US West Coast
Boat: Modified Choate 40
Posts: 10,460
Images: 122
Get into the industrail safety supply mag's. They carry a drip catchers for plumbing or leaking roof's in different sizes with an opening in the middle to drain into bucket/barrels. That's what I use up on the foredeck supported by a fold up frame and hoisted by a spinnaker halyard. ..............._/)

Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful!
A nation of sheep breeds a government of wolves!

Take nothing but pictures, leave nothing but footprints!
delmarrey is online now   Reply With Quote
Old 26-12-2007, 07:22   #3
Moderator Emeritus
Pblais's Avatar

Join Date: Mar 2003
Location: Hayes, VA
Boat: Gozzard 36
Posts: 8,700
Images: 15
Send a message via Skype™ to Pblais
We've been looking into a new design for a rain ratcher/way to divert rain into our tanks.
A fold up plastic or nylon tarp is nice. You don't want something you can't clean. Collecting dirty water isn't any fun. Setting up a tarp with the lines attached can be quickly erected to collect rain and then stowed so it remains clean. Throw in a few folding tent poles to assist you and you can have a lightweight easily stowed system.
Paul Blais
s/v Bright Eyes Gozzard 36
37 15.7 N 76 28.9 W
Pblais is offline   Reply With Quote
Old 26-12-2007, 07:28   #4
Registered User

Join Date: Feb 2007
Location: Auckland NZ
Boat: Stevens 47
Posts: 240
Here's a good one with several different sizes.....

Roof Leak Repair Rain Diverter For Roof Rainwater From Dawg

Good Luck!
To incident I am prone...
Cast me out and watch me skip along.....
Rangiroo is offline   Reply With Quote
Old 26-12-2007, 12:49   #5
Registered User

Join Date: Oct 2007
Location: Southern California
Boat: Was - Passport 45 Ketch
Posts: 834
I noticed that you have a ketch. Building your own rain catcher is easy. We made ours out of Sunbrella. Custom fit it to snap onto the mizzen shrouds with sail hanks. We put a fitting in the center that we hooked a garden hose to. It would collect 50-100 gallons an hour in a good tropical rain.

We'd let it rain for a while to clean the rain catcher and collect that water in a container for washing. Then we would put the hose directly into the tanks.

Be careful with rain water. It will grow bacteria rather quickly if you don't treat it with a small amount of chorline bleach. We always kept our drinking water in separate portable tanks, that could be cleaned regularly. We used our tank water for washing and boiling for coffee and drinks.

We also put water hose fittings on both sides of our awning.

We had 3 - 100g water tanks and never had to buy water or worry about a water-maker in 14 years of cruising. Most of our water came from rain.

On our trip from South Africa to Annapolis MD (7200NM), we arrived with nearly full tanks after 59 days at sea.
Kanani is offline   Reply With Quote
Old 26-12-2007, 13:09   #6
Senior Cruiser
roverhi's Avatar

Cruisers Forum Supporter

Join Date: Aug 2005
Location: Kona, Hawaii
Boat: 1969 Pearson 35 #108
Posts: 5,446
Send a message via Yahoo to roverhi
We just put a 1" through hull fitting in our awning. Pulled it down so it was the low point after the rain had a few minutes to rinse off the salt. Ran the water via vinyl hose to the tanks. Never had to haul any water in a year in French Polynesia.

Peter O.
roverhi is offline   Reply With Quote
Old 26-12-2007, 14:19   #7
Registered User

Join Date: Sep 2007
Location: Colombo
Posts: 1,059
You don't say if you want a permanent setup nor how easy to make you want it. But if you want a permanent arrangement and prepared to do some boat work this is how ours are arranged.

A little inboard from the toerail at the lowest point in the side deck waterways on each side of the boat we have a deck drain around 1-1/2inch dia (might be a bit smaller, I am not on the boat, but thereabouts) to drain the deck waterways so's water does not collect against the toerail. In our case, because of the beam of the boat and the fall on the decks this lowest point is slightly lower than the waterway is at the less beamy stern so deck drains or a freeing hole through the toe tail (which is what is normally done) was necessary to stop water collecting and sitting against the toerail when in the marina. But the following will work even if you don't normally need deck drains.

Each drain hole is situated so that its inner highest side (from the athwartships slope on the deck) is lower than the perforations in the toe rail so water goes down it rather than overflow the toe rail. It is piped straight down to below the waterline through a seacock to avoid staining of the topsides but one could just take it out through the topsides under the sheerline as is done on some boats for deck drains.

A short distance below the deck is a Tee arranged so that straight through is vertical. There is a ball valve just under the Tee in the vertical drop to the seacock and another on the horizontal run. The horizontal run goes to a water tank - we have 2 tanks, one connected to the starboard drain and the other to the port drain.

These deck drains are used for normal filling of the tanks and for catching rainwater from the whole of the deck. So, to fill the tanks one just closes the valve under the Tee and opens the one on the horizontal run from the Tee which goes to that filler's tank. If using a hose one just pokes the hose in the deck drain or, if one sees that it is raining one just gives some time for the decks to wash clean of salt (only takes a minute or two in a downpour) and do the same thing with the valves (without having to go out into the rain and get wet ). After filling the valve under the Tee is opened again and the one in the horizontal run off the Tee to the tank closed.

Instead of two valves and a Tee one could use a Y valve but we figured that using a Tee with the horizontal run to the tanks gives a secure system. Even if any malicious person figured out that the deck drains were used for filling the tanks and poured something down them, it would just go straight out the bottom of the boat through the seacock (which being a deck drain is normally left open). With a Y valve, assuming fitted normal orientation, the contaminant could be caught and held.

As I say, not a temporary arrangement and takes some chopping holes in the boat (we had the builder do it while the boat was being built) but has worked extremely well for us and I would always do the same again. With the catchment off the deck it is surprising how quickly one can collect 100 gallons even in not so heavy rain. We sometimes have untreated rainwater left in our tanks (they are dark) for months at a time and have never had a problem with it becoming tainted from stagnation.

MidLandOne is offline   Reply With Quote

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Washing Rain Gear JusDreaming Health, Safety & Related Gear 8 22-06-2007 07:25
Table Design Charlie Construction, Maintenance & Refit 4 17-05-2007 17:07
New Engine design Alan Wheeler Engines and Propulsion Systems 12 10-12-2006 10:33
Design Awards GordMay Construction, Maintenance & Refit 0 27-10-2006 02:02
New engine design Kai Nui Engines and Propulsion Systems 151 20-05-2006 21:20

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:59.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.