【Premium Metal】This thermostatic valve adapter is made of a single piece of metal , solid brass , chrome plated for maximum rust resistance , providing a robust and enduring solution for residential and commercial heating systems 【Easy Replacement】Our thermostatic valve converter adapter is the ideal solution for adapting valves to modern thermostat standards from before 1998 , without the need for an expensive complete system 【Easy Installation】Our thermostatic valve fine thread adapter is quick to install. Standard connection is M30 x 1.0 (valve) and M30 x 1.5 (thermostat) ; fits many standard thermostats. (Note: The thread pitch on the heating valve must be 1 mm/0.04 inch , and the diameter must be 3 cm/1.18 inch) 【Tight Connection】This thermostatic valve adapter connector ensures a tight and stable connection between the thermostat and the valve , thereby improving the efficiency of heating performance 【Size Details】Before purchasing , please confirm size . Measure the distance between the two threads with a ruler , it must be accurate to 1 mm/0.04 inch , and the diameter is 30 mm/1.18 inch (M30 x 1.0) . Suitable for converting valves with threads from M30 × 1.0 to M30 × 1.5 , ideal for upgrading older radiator valves (up to 1998), Manufacturer: PATNFR