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Old 04-07-2008, 08:50   #31
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This goes back to the old question "What weighs more, a pound of lead or a pound of feathers?"

Just another thought on head pressure and watermakers. Such small pressure as 14lbs exerted on a SW membrane ("shouldn't") but would be more likely to produce osmosis, not reverse osmois. It's why it's important to be careful on a WM installation when running a product water supply line to a tank where the feed is installed at the tank. It would not be the first time a boat owner, after making water, has left the product supply valve open on a improperly installed line and had treated water from the tank ruin the membrane.
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