Flo Control 1700C-15 – 1½″ True-Union Spring Check Valve
Product Overview
The Flo Control 1700C-15 is a clear-body PVC true-union spring-check valve designed to allow water flow in one direction and prevent back-flow in pool, spa, and plumbing systems.
Key Features
- True-union design allows both ends to unscrew for maintenance without cutting pipe.
- Clear PVC body for easy visual inspection of internal parts.
- 1½″ slip-end connections (S x S) for standard pool plumbing lines.
- ½-lb spring preload for reliable pop-open at low pressure differential.
- Designed to prevent unwanted reverse flow and protect equipment.
Technical Specifications
- Part Number: 1700C-15
- Connection Size: 1½″ IPS slip x slip
- Material: Clear PVC Type I body, EPDM O-ring and seat
- Rated Pressure: Up to ~200 psi static at 72 °F
- Spring Preload: ½ lb
Applications & Compatibility
This valve is ideal for use in water circulation systems for pools and spas, irrigation, or any system where back-flow protection is required and visual inspection is needed. Confirm your plumbing line size is 1½″ and you require a spring-check type valve before ordering.
Installation Instructions
- Shut off flow and relieve any pressure in the line before installing.
- Ensure pipe ends are clean and free of debris; apply proper solvent-weld or recommended connection method.
- Install the valve with the arrow showing direction of flow pointing in the intended direction of water movement.
- Tighten union parts as required; restore flow and check for leaks.
Troubleshooting
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Reverse flow occurs: Verify valve orientation, ensure the spring and seat are not damaged, and check for debris blocking closure.
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Valve sticks open or closed: Inspect internal mechanism for wear, clean any buildup, and replace the valve if damaged.
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Excess pressure drop: Confirm proper valve size, check for obstructions, and ensure spring preload is matched to system requirements.
Maintenance Tip
Inspect the valve annually for clarity of the body, presence of debris, and smooth operation of the spring mechanism. Replace if the body is cracked, mechanism is damaged or visual inspection reveals wear.
