Product Description
The NDS 1205-05 is a 0.5-inch PVC spring check valve with a thread-by-thread (TxT) connection designed to prevent backflow in low-pressure plumbing and irrigation systems. The internal spring mechanism holds the valve closed against reverse flow and opens under forward pressure, eliminating the need for manual operation. At 0.15 pounds, this compact valve is lightweight and easy to handle during installation. Plumbers and irrigation technicians install this valve inline wherever one-directional flow control is required to protect pumps, supply lines, and distribution manifolds from backflow contamination.
This valve is suited for residential and light commercial plumbing, drip irrigation, and landscape water distribution applications. The TxT configuration allows threaded connection to standard PVC-threaded fittings and pipe nipples. It is commonly installed on pump discharge lines, zone supply lines, and inline in irrigation lateral runs where backflow prevention is needed without a bulky or code-mandated assembly.
Key Features
- Spring-loaded mechanism provides automatic backflow prevention without manual actuation
- PVC construction resists corrosion and is compatible with standard potable and non-potable water systems
- Thread-by-thread (TxT) end connections for easy inline installation with standard threaded PVC fittings
- Lightweight at 0.15 pounds, reducing stress on small-diameter pipe assemblies
- Compact body size suited for tight installation spaces in irrigation and plumbing applications
Compatibility
Designed as an OEM-style replacement or new-installation component for 0.5-inch threaded PVC plumbing and irrigation systems.
Installation Notes
Installation should be performed by a licensed plumber or qualified irrigation technician in accordance with local plumbing codes and applicable IPC guidelines. Shut off the water supply and relieve system pressure before installing or replacing the valve. Use thread sealant tape rated for PVC on all threaded connections and do not overtighten, as excessive torque can crack PVC fittings. Verify flow direction markings on the valve body before finalizing the installation.
Technical Specifications
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Connection Type: Thread x Thread (TxT)
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Pipe Size: 0.5 inches
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Material: PVC
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Weight: 0.15 pounds
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UPC: 670686020052
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Order Increment: 1
Standard Information
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Brand: NDS
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Manufacturer Part Number: 1205-05
