AMH3K-R under sink or LARGE systems with HOT WATER TANKS OR TANKLESS WATER HEATERS, up to 600 ft pipe length AMR-S3FVALT1 3 Speed Stainless Circulator, 4 Bolt Flanged pattern, 3/4″ Male Stainless Companion Flanges, 10 Ft. Line Cord, Built-In Timer, Built-In Aquastat (On 85°-104°Off), BICV, 2 Hoses, 2 Tees 3/4″. Install Tees before Angle Valve.