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Heating Service Center

Link your heating system to the ½” FNPT connection A . Connect directly a heating expansion tank (HGT-15, HGT-30, HGT-60M and HGT-60), with the Service valve (HGSV12) on the ½” FNPT connection B. Then, on connections C (18” FNPT), connect an automatic air vent (R8818) or a pressure gage (#GAGE0-100BOTTOM or #GAGE0-30BOTTOM). On connection D  (½” MNPT) you can either connect your GMP or simply the cold water supply.


Documents &


Features Heating Service Center

Model FNPT (A) FNPT (B) FNPT (C) FNPT (D) Lenght Height Width
#HGSC 1/2" 1/2" 1/8" 1/2" 10 3/4" 4 1/2" 1/2" 2 3/8"


Hydronic Radiant Floor Heating & Snow Melting