Caleffi Boiler Trim Kit w/ AutoFill & Backflow & 1" Threaded Air Separator & 4.4 Gal. Expansion Tank

Description The NA553 Series Boiler Trim Kit has 10 configurations that combine 8 common boiler installation components into one simple package. Kit Includes: 551006A Air Separator (1" NPT) 573002A: AutoFill/Backflow preventer combination (1/2" NPT) 561402A: Check Valve Tank (4.4 Gallons) (2) 3" Brass Nipples Tee