Apollo Valves 69TANKMAX Water Heater Tank Booster Easy to install; Lead free; extend the life of the hot water in your water heater Saves time and money - no solder or glue needed Protects your family from scalding by allowing water to be 140 degrees (F) in the water heater while distributing 120 degree (F) water to Fixtures Tools needed for installation: wrench, pipe thread sealing tape 3/4" MNPT mixing outlet x 3/4" FNPT union fitting x 3/4" NPSH cold inlet ASSE 1017, NSF 61 & 372, IAMPO listed