This Watts Solar Thermostatic Mixing Valve MMV-S is a high-quality item perfect for anyone looking to improve their boiler system. It is constructed from solid brass and has a brushed brass finish, giving it a sleek and modern look. The valve is designed with a cross shape and has a 1-inch diameter, making it suitable for use with boilers. The valve features internal coating that prevents scale deposits, ensuring that it remains in top condition for a long time. It also comes with an L key for easy installation. This item is made in the United States and comes with a number of useful features, making it an excellent choice for anyone in need of a reliable and efficient mixing valve.