Rola-Chem M-3000 Pool Sentry

This easily assembled product for in-ground and above ground pools attaches to the pool's edge and is essential for your constantly unattended pool. A standard garden hose attaches to the Pool Sentry and provides the constant flow to keep water high enough and is automatically shut off after reaching your predetermined ideal level.Water Leveller, Pool Sentry, Control, M-3000.