The Intatec ZERO HEAT PUMP ANTI-FREEZE VALVE is a high-quality product designed for hot water underfloor heating systems. This valve, model ZERO1SW, features a timerless control and is made of durable brass material. With an energy efficiency rating of A+++, this valve is perfect for maintaining a comfortable and eco-friendly heating system in your home. The 1" male x 1" female connection makes it easy to install on the wall, ensuring efficient heat distribution throughout your space.