Where does the water come from?  How do you know what pressure you need in a building? Are you over 80PSI?  Are mountain states the only ones who have big fluxuations in municipal water supply pressures?  What is a "noisy little guy?" In this episode, the guys are throwing paper airplanes and talking about pressure reducing valves.  Our PresCal is sold all over the world, so we have seen some crazy applications.  Dan, Greg, and Cody discuss what pressures you should shoot for when adjusting a PRV.  They also explain why two pressure reducing valves in series may be a great way to go.  If your PRV pressure is creeping up, there is one quick thing you can do to get it back in service, without running to the wholesaler.