Resideo TK300-15 Expansion Tank 2-Gallon 1/2" NPT

The Resideo TK300-15 is a 2-gallon Thermal Expansion Tank used to handle the pressure changes in heating and cooling systems. It has a 1/2” male NPT connection and effectively handles the expanded water volume when the temperature in a closed-loop system increases to avoid damaging plumbing, fixtures and appliances. Compatible with most HVAC applications such as boilers, hydronic heating, and water heating applications. The tank is built from a steel material and has a diaphragm of butyl/EPDM that isolates the water from the air to maintain pressure and prolong the durability of the system.