Hydro Quip 100 Foot Topside Extension Cable [HQ Gecko] (30 1010 100) filters Designed for negative pressure indoor venting Designed for negative pressure indoor venting setups This version is especially useful when the original timer has failed and the installation depends on 115 volt panel mount service with a weekly scheduling format The 30 1010 100 is a practical accessory when a compatible Hydro Quip setup needs a long topside extension cable to support a more flexible panel location This version is especially useful when the installation demands a full 100 feet of reach and the supported system uses an HQ or Gecko topside arrangement