I have two 2" PVC pipes that run up to the solar on my roof. The pipes are flush with the wall of my house. There is no space between the pipes and my house. I want to install two ball valves in the pipes, but I cant figure out how to do it without removing the pipes. The only unions I can find are a much bigger diameter than the existing pipes and would require me to move the pipes away from the house to accommodate the wider unions. . Does anyone know of any 2" slip joints that might work or maybe some other trick to squeeze in the ball valves without moving the pipes away from the wall? Thanks!