Pedrollo Presflow Demand System from Complete Aquatics Alpha BioSystems professional-grade basin is designed to

professional-grade basin is designed to provide mechanical filtration and direct harvested rainwater from the surface of a roof to the SustainRain® storage area

feed 2-4 times daily

The Dock Mounted version should be under the water surface 3'

which fits most patio umbrellas

ET100A & ETP80A 3 1/8"  Diameter SKET100 ET120

Pedrollo Presflow Demand System from Complete Aquatics Alpha BioSystems professional-grade basin is designed toThe Pedrollo Presflow Demand System from Complete Aquatics is a premium demand pump that starts and stops according to the requirements of the user. The pump provides an excellent way to pull harvested rainwater from the reservoir supplying pressurized water to irrigate flower and landscape beds, wash decks or cars, or to top off water features.