I am trying to find the homepage for Diamond Well pumps. I have this one www.diamondbygsw.com but I get no ping reply so I image the site or company is gone. I'm trying to find info on the little black plastic screw used to build pressure during the first fill. I just can't remeber the precedure, something like srew it all the way in, wait till it hits around 40 pdi and then back it off until it reads 25psi. Anyone know for sure or can point me the right web site.