Two-pipe, single setpoint, pneumatic thermostat used to provide proportional control of pneumatic valves and damper actuators in heating and air conditioning systems. Replacement kits are available for Johnson, Powers, Robertshaw, Barber-Colman, and older Honeywell two-pipe pneumatic thermostats.
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Q:Does number of pipes (2 or 3), represent the number of small pipes sticking out the back?
A:The back of this unit has 2 pipe connectors - main and branch.
A:The answer is yes!