Taco 006-DM-PK model is a complete kit and includes all the parts needed for a clean and easy installation. Taco D'MAND system can be activated manually, with a push of a button, or wirelessly, with an optional transmitter/receiver. Taco 006-DM-PK Sizing: This model is the most popular in Taco's D'MAND line of products for residential applications and is well suited for small size residences. Maximum allowed length of pipe (hot+cold lines) for storage type water heaters is 100ft, for tankless water heaters - 60ft. Taco 006-DM-PK Specifications: Voltage: 115V; Amperage: 0.52 AMPs; Freq.: 60 Hz; Phase: 1; Max. pressure: 125 psi; Max. temperature: 220F; Min. temperature: 40F; Max. flow: 2.2 GPM; Max. head: 6ft; Installation manual included.