The 2 X Into Automatic By-Pass Differential Valve - 28mm Straight ABPS28CP is a compact and energy-efficient by-pass valve from Inta, designed for indoor heating systems. Made of brass with a silver colour, this valve is adjustable and comes with a 6-month manufacturer warranty. With a 28mm compression water connection, it offers an energy efficiency rating of A++. Perfect for standard water heaters, this valve helps to regulate the heating system for optimal performance and comfort.