This Drayton 679-2 22mm 2 port body valve is designed for use with the Drayton ZA5 and British Gas BGMVSP-2 storage tank water heaters. It is a high-quality product that ensures reliable and efficient performance for your heating system. With its sturdy build and durable material, this valve is built to last and withstand any wear and tear. The valve is specifically designed to control the flow of hot water to your radiators or underfloor heating system. It is easy to install and provides a simple solution to your heating needs. Whether you are looking to replace an existing valve or install a new heating system, this Drayton valve is an excellent choice that will provide you with reliable and efficient service for years to come.