This Onsen water hose kit provides an easy solution for connecting a water source with the Onsen 5L, 7L and 10L Portable Tankless Water Heaters and the Onsen 3.0 Pump and 1.0 Accumulator. The kit includes three lengths of hose: 7 feet for connection between water heater and accumulator, 1 foot for connection between pump and accumulator, and 16 feet for connection between water source and pump. Designed specifically for use with all Onsen portable tankless water heaters, the hose features a ½ ID diameter to help ensure the required water pressure to operate the water heaters as well as ½ NPT aluminum swiveling connectors to allow for direct connection to the threaded fittings of waters heaters, pump and accumulator without the need for adapters.