The 1/4" rubber o-ring is used with 1/4" barb x thread adapter to ensure a watertight fit on any PVC pipe. Attach the "O" ring to the threaded side of the 1/4" connector.
The EZ-FLO All-in-One applicators for drip and sprinklers systems are commercial grade automatic fertilization and chemical application systems. These are the best high capacity hose-end feeders available to both consumers and professionals for distributing water-soluble fertilizers and chemicals evenly, at adjustable proportioning rates. The hose thread and drip connection units can attach to any hose bib (the end near the faucet) so the tank doesn't have to be carried with the hose when feeding. The units work with all water soluble and liquid fertilizers, which can be combined in the unit with other chemicals and nutrients to provide "All-In-One" plant and landscape care. This line of applicators has a wide range of accessories for upgrade or replacement and also provides the flexibility to update the system from a residential unit to landscape applications, nurseries or small farms.