Honeywell Commercial AK3863 Pneumatic Humidistat Thermostat Tool KitPneumatic Humidistat Thermostat Tool Kit from Honeywell is essential for maintaining precise humidity control in commercial HVAC systems. Designed for use with HP970, HP972, TP970, and TP900 humidistat models, this kit supports reliable service and accurate calibration of pneumatic humidistat thermostats. Part of the AK3863 family, this thermostat tool kit helps service technicians perform quick diagnostics, repairs, and routine maintenance. It

Easy installation and quick retrofit in Heil Quaker/ICP systems

safe replacements that maintain system efficiency and indoor comfort

this reusable filter helps you cut waste while keeping your space comfortable

CSA approved for use in Canada and US

AO Smith 9004420105 gas valve kit for natural gas systems delivers reliable control

extending pump life and maintaining optimal flow performance

120/240/277 VAC (Resistive/Pilot Duty)

controlled flow

minimizing downtime during routine service

pilot-operated with diaphragm and piston design

Featuring a 1/4 inch inlet

Built to deliver consistent switch logic and durable performance