SailNet Community - View Single Post - The cheapest RO membrane on market
View Single Post
post #7 of Old 04-27-2019
colemj
Senior Member
 
colemj's Avatar
 
Join Date: Jul 2003
Location: On the boat cruising
Posts: 3,153
Thanks: 4
Thanked 126 Times in 120 Posts
Rep Power: 17
 
Re: The cheapest RO membrane on market

There is no way a pressure washer pump will drive a 4" membrane, so you can forget about those. In addition to the membrane, pressure vessel, and pressure washer pump, you will need high pressure hoses and appropriate fittings, a good quality needle valve, a pressure gauge, a prefilter housing and filter, and an assortment of valves, tubing, and fittings. Almost all of the cost will be in the pump, membrane, pressure vessel, and needle valve.

I don't know what you think you will pay in the end for all of the above, but it likely won't be much less than just ordering one of these: https://seawaterpro.com/shop?olsPage...watermaker-kit

The type of system you are pursuing runs off AC power, so I assume you have the electricity to run this - either a generator, or a large battery bank and inverter. Also, anecdotal reports from people using pressure washer pumps for watermakers show them needing replacement pumps every year or so. The pumps are cheap - $100 - but if you plan on using this watermaker for several years, the cost does add up eventually.

Mark

Dolphin 460 Catamaran "Reach"

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
- Current boat

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
- Previous boat
colemj is offline  
 
 
For the best viewing experience please update your browser to Google Chrome