The Caleffi 59977 is FlowShield™ UPSTREAM CHECK VALVE FOR 574004A, a genuine FlowShield service part for Caleffi backflow preventers.
Product data compiled from Caleffi North America technical documentation. Last reviewed July 2026.
FunctionService Part
Warranty2 Years
Key Features
Genuine FlowShield Part
Factory service component: FlowShield™ UPSTREAM CHECK VALVE FOR 574004A.
Direct Fit
Designed to fit and rebuild the matching Caleffi FlowShield backflow preventer.
Technical Data
| Function | Backflow preventer service part |
|---|
Documentation
Technical brochureRelated Products
Frequently Asked Questions
What is the Caleffi 59977?
It is FlowShield™ UPSTREAM CHECK VALVE FOR 574004A, a genuine Caleffi FlowShield service / repair part.
Which preventer does it fit?
It is designed for the matching Caleffi FlowShield backflow preventer in its series. Confirm the model before ordering.
2-Year Limited Warranty. Backed by Caleffi North America's limited warranty against defects in material and workmanship for two years from date of shipment. See Caleffi's limited warranty for full terms.
- Type:
- Accessory
- Series:
- FlowShield
