Dri-Eaz Hydrosensor II Moisture Probe Base UOM:EACH A ball check has to

A ball check has to be pushed open before flow starts

and it is worth understanding before you buy

A replacement ball and spring is available as a separate service item

Innovative "Spray Guards" for Unparalleled Performance:

Dri-Eaz Hydrosensor II Moisture Probe Base UOM:EACH A ball check has toDri Eaz Hydrosensor II Map the migration of water in carpet and pad without straining your back. The HydroSensor II has a collapsible shaft that extends to 31 inches to save your knees and posture. Sensitive nickel plated points alert you to moisture content above 17 percent. Extends to 78 cm for use. Collapses to 53 cm for storage. Stainless steel construction. Nickel plated, retractable points. The HydroSensor Moisture Probe is designed to detect