Hoffman Air Valve 401429 74, 1/2" x 3/4" Straight Steam Unit Heater Air Valve size_1/2"_6" Ordering the C-244 gives you

Ordering the C-244 gives you the same style hydrant as the C-144 but with a vandalproof extended lock shield with operating key

Special size:s are available by request

Designed as a support

Ordering the C-208 gives you the same style hydrant but with vandal proof extended lock shields with operating key on both hot and cold stems

vacuum lines for pools or spas

Hoffman Air Valve 401429 74, 1/2" x 3/4" Straight Steam Unit Heater Air Valve size_1/2"_6" Ordering the C-244 gives youSteam Unit Heater Air Valve Float type thermostatic vent Single non adjustable port 12" NPT female and 34" NPT male straight shank Install 6 10" (150 250mm) above horizontal returnand 18" (450mm) above the boiler water line Maximum operating pressure 35 psig (2. 4 bar)*(Drop away pressure maximum pressure against which the ventcan open). Maximum pressure 35 psig (2. 4 bar)