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					Originally Posted by Tarolisol
					
				 
				Isnt gravity feed just a holding tank with RO water above sump level then a float valve in the sump, when the water gets low in the sump the valve opens to the holding tub and tops it off? 
			
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 yup, I have a 110gal resavoir above the tank highet to a float valve.  I like this as it will work with no power (less to go wrong)  I just fill up the resavoir every month  I have gone 2 months befor having to fill it.  
 
Steve  
		
	
		
		
		
		
			
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