TheCheck Valve Dual Union 3″is a heavy-duty, high-capacity backflow prevention valve designed for use inlarge-scale pond systems,commercial water features,filtration lines, andhigh-flow pump setups. Itstrue union designwith dual disconnect points makes maintenance and replacement fast and clean—no cutting or re-plumbing required.
This valve series includes:
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Complete valve assemblieswith3″ male adaptersand pipe
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Slip-fit modelsfor easy solvent-weld installation
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Threaded collarsandO-ringsfor replacement and long-term servicing
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Just the valvebody for use with existing union parts
Built fromhigh-strength PVC and corrosion-resistant internals, this valve delivers long-term durability and leak protection, even in high-volume aquatic environments.
? Product Variants:
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Check Valve Dual Union 3″ w/ 3″ Pipe & Male Adapter
Complete pre-assembled system for pump installation with adapters included. -
Check Valve Dual Union 3″ – 3″ Slip Fitting
Includes slip socket ends for gluing into standard 3″ PVC pipe. -
Check Valve Dual Union 3″ – Threaded Collar
Replacement collar to secure union on either side of the valve body. -
Check Valve Dual Union 3″ – Just the Valve
Standalone valve body (no collars or fittings) for direct replacement. -
Check Valve Dual Union 3″ – O-Ring
High-quality rubber O-ring for leak-free sealing. Sold individually.
✅ Key Features:
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True Union Design:Easy to remove and replace without cutting pipe
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Heavy-Duty 3″ Build:Handles large water volumes and high-flow systems
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Compatible with Multiple Configurations:Slip, threaded, or adapter connections
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Replaceable Parts Available:Threaded collars and O-rings for maintenance
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Corrosion-Resistant Construction:PVC body with durable seals






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