Type EA – Verifiable single check valve

A verifiable mechanical backflow prevention device which will permit water to flow from upstream to downstream but not in the reverse direction. 

Maximum permissible fluid category against which a Type EA device is accepted as adequate backflow protection:

Backflow by back pressure: fluid category 2

Backflow by back siphonage: fluid category 2

Interpretation given in Regulators’ Backflow Specification - backflow prevention arrangements and devices: backflow prevention arrangements