Fusion 0 Posted January 24, 2011 Share Posted January 24, 2011 Then http://www.catpumps.com/select/pdfs/231.pdf Link to post Share on other sites
wheels 543 Posted January 24, 2011 Share Posted January 24, 2011 I have heard of Brass pumps being used and suggested for homemade watermakers, but Pete is obviously getting a lot of experience with watermakers, so if he says the Brass pumps don't last, then it is probably advisable to listen to his experience. The Topmaq one does have ceramic pistons and it does have SST valves. Just how the SST valves and brass body will work out in Salt water I am not sure. The seals around the ceramic pistons have no metal at all. The bypass/pressure adjusting valve is brass with a SST valve tip. I have found the pressure spring in that pressure valve to be a plain steel spring and once the valve leaks, thats the end of the spring. You don't need 13Hp to drive it. It requires that for delivering full pressure as a blaster. Link to post Share on other sites
Bad Kitty 252 Posted January 24, 2011 Share Posted January 24, 2011 On the cat we are using a 240 volt watermaker. We wanted a dive compressor on the boat, and a genset & ac driven compressor made the most sense for us. Once you have the genset a lot of other stuff just falls into place. Like a 240v watermaker, makes 170 litres an hour down here and about 200/hr in the islands. Original plan was a small 12v watermaker, but it is important to think about where you will make water. On an ocean crossing you can run it all the time because the water is clean, but if you are around land you may have to go out a bit & sail round & round in circles for 3 days , or go thru a lot of filters. So with a big watermaker, if we are in crappy water, we head out somewhere clean for a couple of hours & fill the tank. And I agree with PW about electronics, ours is manual but they are easy to use. Start the feed pump, start the HP pump then wind up the pressure thru the membrane. Test the salt content manually after a few minutes, & open the valve to the tank. Even I can do it! Link to post Share on other sites
Guest Posted January 24, 2011 Share Posted January 24, 2011 but Pete is obviously getting a lot of experience with watermakers, so if he says the Brass pumps don't last, then it is probably advisable to listen to his experience. The bypass/pressure adjusting valve is brass with a SST valve tip. I have found the pressure spring in that pressure valve to be a plain steel spring and once the valve leaks, thats the end of the spring. Yes I'm still "getting a lot of experience with watermakers" but I already have quite a lot as well. Have been specialising for the last 12 years. The pressure valve on the pump cannot be used & must be removed & plugged or adjusted so it can be used as a high pressure safety valve The pressure regulation actually occurs after the membrane and is best achieved with a manually adjustable orifice valve rather than a spring loaded regulator. Link to post Share on other sites
Guest Posted January 24, 2011 Share Posted January 24, 2011 Whats wrong with the sun? A SOLAR "still" can make loads of water over time (and "other liquids" too!! )... no moving parts or exspensive bits. Link to post Share on other sites
wheels 543 Posted January 24, 2011 Share Posted January 24, 2011 Whats wrong with the sun? A SOLAR "still" can make loads of water over time That's the problem, time. Plus it's size and that it makes water only on a sunny day and if you are in Hot weather. Link to post Share on other sites
marinheiro 352 Posted January 31, 2011 Share Posted January 31, 2011 Another good water maker supplier is Echotec http://www.echotecwatermakers.com/rever ... makers.htm Good solid basic equipment, the 12V units use a bit more power than Spectra's but can be bought for half the price. If my existing Power Survivor 80 is not able to keep up with the demands of the female crew, then I would go for one of their 12V units Link to post Share on other sites
southernman 73 Posted February 15, 2011 Share Posted February 15, 2011 Bit late on this guys and I know its advertising but if David want's some advertising I am keen to put an add up (David sent you an PM - can you advise $$?). If anyone wants a good watermaker we sell and are the NZ / South Pac agent for Schenker which is very simular to the Spectra. Good quality gear and we have sold a number now in the NZ market. Very low power consumption and small footprint. Check out the add on trade me for more info or if you want one at a special crew price then give me a bell 021 884 827 or visit www.waterpro.co.nz Link to post Share on other sites
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