All-in-One Installation Kit: Our tankless water heater isolation service valve includes hot and cold water isolation valves, a relief valve, and thread seal tapeeverything you need for a complete, hassle-free installation Premium Lead-Free Brass & SUS304: Made from durable lead-free brass and SUS304 stainless steel, the tankless water heater valve kit provides high strength, corrosion resistance, and long-lasting leak protection, ensuring a stable water heating system Easy Installation & High Compatibility: Our tankless water heater installation kit utilizes standard 3/4-inch connections, fitting most tankless water heaters