Flo Control 1700C-20 True Union Spring Check Valve – 2″

Part Number: 1700C-20 (sometimes shown as 1700C-20 or 1700C20)

Description

A clear PVC true-union check valve designed to prevent reverse flow in pool and spa plumbing systems. The unit features a spring-loaded flap and a union design so the body can be easily removed for inspection or maintenance without cutting pipe.

Compatibility & Fitment

• 2″ nominal IPS size for typical pool / spa plumbing return or suction lines.
• Designed for systems where backflow protection is required — e.g., heaters, sanitizers or chemical feeders.
• True-union ends make it easy to service the valve without removing glued pipe—great for service techs or installations requiring future access.

Features & Specifications

• Connection size: 2″ IPS with union nut ends.
• Rated spring tension: approx. ½ lb to resist normal forward flow yet close quickly under reverse flow conditions. 
• Material: clear PVC body for visual inspection of operation, EPDM seals, stainless steel spring. 
• Pressure rating: up to ~200 psi static at 72°F in typical pool applications. 
• True-union design: remove the nut unions to service the main body without cutting the pipe. 

Installation Notes

Turn off pump and relieve system pressure before installation. Cut in the valve with socket or fitting pipe ends, ensuring correct alignment with flow arrow. Prime the union nuts hand-tight, then rotate gently to ensure full seating. After installation, inspect for leaks and verify proper check valve closure by momentarily reversing flow (simulate pump shutdown). Maintain forward orientation per flow arrow marked on body.

Maintenance Tip

Inspect the valve annually or if system exhibits unexpected backflow, debris entering from return line, or equipment purge issues. Remove the valve body via union nuts, clean any debris, verify spring action and re-assemble. If the clear body appears cracked or heavily scratched, replace the valve to maintain full integrity.