Kia Ora, In answer to Christine Allison and Ulli Hoeger , I forward this (old) contriution from Peter Treby, I wanted to install one for some time but never got round to it and saved the info. It sounds still valid I do not like the idea of a lead cell ,sulphuric acid,open battery and salt water, when the two mix the gasses could be quite potent.And it only needs one accident. The batteries mentioned are totally enclosed. With modern sealants ,corrosion of wiring etc. with carefull installation should be minimal. And if Peter is still around he might like to tell us how it has worked out in his boat.??. Regards Eddie. ----- Original Message ----- From: "Peter Treby" <ptreby_at_ozemail.com.au> "Paddlewise" <paddlewise_at_lists.intelenet.net> Sent: Wednesday, June 01, 1994 10:07 AM Subject: Re: [Paddlewise] Electrodynamic hydropurgation devices Kia Ora, In answer to Christine Allison and Ulli Hoeger , > The battery I have was purchased at an electrical / electronic chain store, > Dick Smith Electronics, a similar outfit to Tandy Electronics. I suppose > these exist in the US. The battery is a "Newmax" FNC 1270 , 12V 7AH sealed > rechargeable battery made by Dong Ho Electric Co Ltd in Korea, so should be > available worldwide. It measures 6"x3.5"x2.5". This type of battery is sold > to run domestic security alarm systems. It is too big and heavy. The same > type of battery is available in 2AH and 4 AH sizes. The 4AH is about 2/3rds > the size of mine, and would be adequate. Probably the smallest one would be, > too. In the first six months of use, I didn't have to recharge mine. I don't > know how long it takes to discharge in actual use, but I suppose it would be > prudent to recharge it before any big trip. > I made up a marine ply box which is mounted behind the rear bulkhead, and > the wires passed through at a high level just under the deck, into the > cockpit. The hole is covered in sealant, and so far no leakage. A small > waterproof toggle switch, purchased at the same electronic store is mounted > on the deck just behind the cockpit, covered by a saddle to help accidental > operation. Actually, accidental operation isn't too much of a problem, as > the whirring of the pump is obvious. > The instructions with the pump indicate wiring in a fuse, but I have not > included this so as to avoid one more set of fail prone connections. Time > will tell if that is a good idea. > > Gabriel L Romeu wrote: > > > You have all convinced me that an electric Rule 500 pump is the way to > > go to fit in the kayak I am currently building. I went to the website > > and found 5 options for this pump, the only viable options being 1.the > > pump itself 2. a new model with a lower profile 3. an mercury float > > switch or a 4. non mechanical computer switch. My preference is to keep > > it simple, so the internal switched ones are attractive, but I am sure > > there are some issues. Any thoughts? > > > > Where should I be looking for a battery and what is the minimal size? > > -- > > : : > Website: http://www.paddlewise.net/ > *************************************************************************** > *************************************************************************** PaddleWise Paddling Mailing List - All postings copyright the author and not to be reproduced outside PaddleWise without author's permission Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
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