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					Originally Posted by  asmodeus
					 
				 
				all my years i have never had any leaks and i pile it on that is the key and i dont use primer or rough it up  and put it on ad turn it 3 times complete and tah daaaaaa its GTG 
			
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 +1 on give it a turn that is the key right there. When you turn the fitting together it distributes the glue evenly and pushes out air bubbles. I do use primer as it does give a better bond, but it is not needed as our systems are generaly have low presure levels. Under 75psi it is not needed I believe; I should look it up again but a good idear to use it for the $4.95 it costs.... I get mine for about $2. 
Bill