Check the listing for details. Geothermal Loop Fill Tool For Garden Hose Geo Needle W/ 100psi Gauge + Protector. Condition: New. Listed at 59.99 USD. Geothermal loop fill tool that connects to a garden hose with a swivel connector for easy installing without kinking hose Loop side is 1/8 inch geothermal fill needle with protector 100 PSI gauge with quarter turn shut off You can connect your garden hose to utility sink faucet, hot water tank or pressure tank to easily add pressure that has been lost over the heating and cooling seasonsGeothermal loop fill tool that connects to a garden hose with a swivel connector for easy installing without kinking hose Loop side is 1/8 inch geothermal fill needle with protector 100 PSI gauge with quarter turn shut off You can connect your garden hose to utility sink faucet, hot water tank or pressure tank to easily add pressure that has been lost over the heating and cooling seasons