Gorton #4 1/8" air vent used on radiators in a room where the thermostat is located and on radiators that affect the thermostat.

Gorton #5 1/8" air vent used on radiators in a warm room closest to the boiler.

Gorton #6 1/8" air vent used on radiators in a cold room farther from the boiler like a second floor.

Gorton #C 1/8" air vent used on radiators in a cold room farthest from the boiler like a third floor.

Gorton #D 1/8" air vent used on radiators that require large amounts of air must be vented.

Gorton #1, 3/4" air eliminator used on short mains or mains on the warm side of a building.

Gorton #2, 1/2" air eliminator used on long mains or mains on the cold side of a building.

Gorton # 1965 1/8" angle pattern steam air valve to 10 psi.

Maxivent is an 1/8" cast brass air vent for removing air in hot water systems, tanks, radiators and baseboards. 150 psi maximum.

Maxivent is an 1/4" cast brass air vent for removing air in hot water systems, tanks, radiators and baseboards. 150 psi maximum.

Hygrovent is an 1/8" automatic air vent for removing air in hot water or steam systems, radiators, baseboards and convectors. 125 psi water & 10 psi steam maximum, with positive shut-off ball check.

Honeywell-Sparco 3/8" NPT SuperVent top air vent for heating and cooling systems. The SuperVent air vent has high venting capacity, incorporates a check valve, and is for use with SuperVent PV Series products.

Armstrong 2" 6AV cast iron air vent with a 22 psi maximum operating pressure.

Armstrong 2" 6AV cast iron air vent with a 250 psi maximum operating pressure.

Armstrong 1/2" 1AV cast iron air vent with a 300 psi maximum operating pressure.

Armstrong 3/4" 1AV cast iron air vent with a 300 psi maximum operating pressure.

Armstrong 3/4" 2AV cast iron air vent with a 97 psi maximum operating pressure.

Armstrong 3/4" 2AV cast iron air vent with a 250 psi maximum operating pressure.

Armstrong 2" 6AV cast iron air vent with a 250 psi maximum operating pressure.

B&G 4V is a 1/8"IPM coin operated manual air for venting radiators in hot water heating systems. 150 psi maximum and 250 degree F.

Number 7 1/8"IPM automatic hot water air vent with maximum pressure of 75 PSI and 240 degrees F. Designed for hot water radiators, baseboards, convectors and small unit heaters.

B&G 17-JR is a 1/8"IPM automatic hot water air valve with 30lb maximum psi and maximum temperature of 225 degree F. Discontinued. Shown here for historical reference only.

B&G 17-SR is a 1/8"IPM automatic hot water air valve with manual shut-off. 30lb maximum psi and maximum temperature of 225 degree F.

B&G number #26 is a 3/4"IPM vacuum breaker for both hot water and steam heating systems. Maximum 150 psi and 300 degree F.

Number 67 1/8"IPM automatic hot water air vent with maximum pressure of 50 PSI and 240 degrees F. Designed for hot water radiators, baseboards, convectors and small unit heaters.

B&G number 87 is a combination 3/4"IPM x 1/2"IPF automatic air vent for hydronic heating systems. Maximum 150 psi and 240 degree F.

B&G number 107A is a 3/4" female pipe x 3/8" male pipeHi-Capacity cast iron air vent for purging large amounts of air from all liquid systems. Maximum 150 psi and 250 degree F.

B&G number 400 (97) is a 1/8"IPM automatic air vent for hydronic heating systems. Maximum 150 psi and 240 degree F.

Hoffman 1A steam radiator vent, float type, 1/8"NPT angle 10lb maximum, with adjustable 6 port settings.

Hoffman 1B steam radiator vent, float type, 1/8"NPT straight 1-1/2lb maximum, with adjustable 6 port settings.

Hoffman 3 steam air line valve, thermostatic (no float), 1/8"NPT inlet x 1/4"NPT outlet 25lb maximum, for air line or Paul systems.

Hoffman 4 steam quick valve, thermostatic (no float), 1/2"NPT female x 3/4"NPT male 25lb maximum, for Process equipment, operates on temperature change only, does not close against water, must be installed 6-10" above return and 18" above boiler water line.

Hoffman 4A air valve non-vacuum, float type, 1/2"NPT female x 3/4"NPT male 2lb maximum, for residential or small one or two pipe systems, must be installed 6-10" above return and 18" above boiler water line.

Hoffman 40 steam radiator vent, float type, 1/8"NPT angle 10lb maximum, single non-adjustable port for one pipe systems that do not require proportional venting.

Hoffman 41 convector steam vent, non-vacuum, float type, 1/8"NPT straight shank, 10lb maximum, single non-adjustable port.

Hoffman 43 convector steam vent, non-vacuum, float type, 1/4"NPT straight shank, 10lb maximum, single non-adjustable port.

Hoffman 45 convector steam vent, non-vacuum, float type, 1/2"NPT female x 3/4"NPT male straight shank, 10lb maximum, single non-adjustable port.

Hoffman 62 vacuum breaker, 3/4"NPT male straight shank, 150lb maximum, adjustable from 1/4" to 20" vacuum, for closed vessels and piping systems to control inducted vacuum.

Hoffman 70 steam radiator vent, float type, 1/8"NPT angle 15lb maximum, single non-adjustable port for one pipe systems that do not require proportional venting.

Hoffman 71A convector steam vent, non-vacuum, float type, 1/8"NPT straight shank, 15lb maximum, single non-adjustable port.

Hoffman 71B convector steam vent, non-vacuum, float type, 1/4"NPT straight shank, 15lb maximum, single non-adjustable port.

Hoffman 71C convector steam vent, non-vacuum, float type, straight shank, dual thread 1/2" female x 3/4" male 15lb maximum, single non-adjustable port.

Hoffman 74 steam unit heater vent, non-vacuum, float type, 1/2"NPT female x 3/4"NPT male straight shank, 35lb maximum, single non-adjustable port.

Hoffman 75 steam main vent, non-vacuum, float type, 1/2"NPT female x 3/4"NPT male straight shank, 15lb maximum, single non-adjustable port.

Hoffman 75H steam main vent, non-vacuum, float type, 1/2"NPT female x 3/4"NPT male straight shank, 15lb maximum, single non-adjustable port.

Hoffman 76 steam main vent, vacuum valve, float type, 1/2"NPT female x 3/4"NPT male straight shank, 15lb maximum, for medium and large one-piipe vacuum systems, must be installed 6-10" above return and 18" above boiler water line.

Hoffman 78 water main vent valve, cast brass body, 3/4"NPT male straight shank, 150lb maximum, for high pressure hot or cold water mains.

Hoffman 79 water main vent valve with built-in check valve,3/4"NPT male x 1/2"NPT female straight shank, 75lb maximum, for high pressure hot or cold water mains.

Hoffman 508 radiator water vent valve, 1/8"NPT male straight shank, 50lb maximum, for automatic or manual venting of radiators, disc type vent with built in check valve. This is the update to the Hoffman No. 500 air vent and the replacement for the B&G 17-JR and 17-SR.

Hoffman 550 Air chamber, 1/4"NPT male straight shank x 1/8" IPF top outlet, 100lb maximum water & 25lb steam, for use on convectors which are not provided with built-in air chambers or air collection fittings..