im planning on getting a danner mag 3, however i've read reviews about cracking the pump when screwing 1/2" barbs on them. what kind of barbs do i need for a 1/2" ID system? and would i need to seal it with silicone or something to prevent it from leaking? would i just need this male adapter http://www.cooltechnica.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=MPAE&Category_Code=H ?