My 1 HP pump is blowing the connections off of my 3-way valve when trying to hook up the solar. Even when I have the solar blocked off, that is the connection that blows. I tried it half open and it still didn't hold. I am using flex hoses (I know not the best) and clamps on the connections. Do I need to reduce the water pressure somehow before it goes to the solar? My filter was about 18 psi before attempting the solar hook-up. I'll go out and take a picture, though I am ashamed of my meager plumbing attempts after seeing all the professionals here! We are about ready to say "forget it" with the solar - it's been plenty hot already and we might not need it until fall at this point.