Resideo by Honeywell TK300-30A-2FM Boiler Trim Kit with 4.4 Gallon Expansion Tank and 1-1/4" Air Purger

The Resideo TK300-30A-2FM Boiler Trim Kit with Air Purger is a complete solution designed to simplify boiler change-outs and hydronic heating system installations. This all-in-one kit provides the essential components needed for efficient hydronic heating system operation, saving time and effort during installation.

Complete Kit Includes:

• TK300-30 expansion tank (4.4 gallon capacity)
• AP401 air purger for closed heating systems
• FV180 GoldTop universal air vent
• SCV-0125 and SCV-050 service check valves
• FM911 combination boiler fill valve/backflow preventer

Key Features:

• Butyl/EPDM diaphragm, nine times better than natural rubber
• Deep-drawn steel tank construction controls system pressure
• Factory pre-charged to 12 PSIG and 100% tested
• Maximum operating pressure of 100 PSI with temperature rating up to 240°F
• 1-1/4 inch air purger connection and 1/2 inch tank connection
• 11 inch diameter and 15-1/2 inch height dimensions

These components work together to maintain proper water pressure, remove unwanted air, and ensure smooth water circulation throughout your heating system, helping prevent corrosion, noise, and costly breakdowns. The expansion tank absorbs hot water expansion in closed heating systems and is equipped with a butyl diaphragm to separate the air from the system water.