Works as Advertised
Your review: The pressure vacuum unit works as advertised and is easily installed. Would highly recommend the unit is protected from freezing. It takes only a single instance of below freezing temperatures to cause a failure.
Pros: The unite was easily installed in under 15 minutes provided all connections are pre-measured for proper fitting.
Cons: Single instance of below freezing temperature can result in a failure. I suggest manufacturer offering a foam or similar molded housing for protection, that can be reused during inclement weather forecast. An added benefit is the unit can be shipped in this molded covering that serves as a winter protection device. Fixed costs would be negligible.