Product Overview
The AY McDonald 203-257 Legend S-670 is a 1-1/2 in. PVC union check/ball combination valve designed to provide positive backflow prevention in horizontal or vertical installations. The combination design pairs a check valve with an attached ball valve so the check assembly can be isolated, removed, cleaned, or inspected without replacing the full valve body.
Key Features:
- 1-1/2 in. PVC union check/ball combination valve
- Designed for positive backflow prevention in horizontal or vertical position
- Combination check and ball valve design allows service isolation
- True union swing design supports easier removal for cleaning and inspection
- Compatible with Schedule 40 or Schedule 80 PVC pipe
- PVC construction from ASTM D1784 virgin PVC resin
Common Uses:
- Irrigation and water system piping
- PVC plumbing installations requiring backflow prevention
- Pump discharge piping where a check valve and shutoff are useful
- Serviceable PVC valve assemblies
Technical Specifications:
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Model: Legend S-670
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Size: 1-1/2 in.
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Material: PVC constructed from ASTM D1784 virgin PVC resin
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Valve Type: Union check/ball combination valve
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Pressure Rating: 75 W.O.G. at 72°F
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Maximum Service Temperature: 140°F
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Compatible Pipe: Schedule 40 or Schedule 80 PVC pipe
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Installation Orientation: Vertical or horizontal
Important Compatibility Note:
Confirm pipe size, pipe schedule, service temperature, and pressure requirements before ordering. Follow local plumbing requirements for installation and testing.
FAQ
Can this valve be installed vertically or horizontally?
Yes. The S-670 is designed for positive backflow prevention in either vertical or horizontal position.
What pipe schedules can it be used with?
It may be installed on Schedule 40 or Schedule 80 PVC pipe.
Can the check valve be serviced?
Yes. The combination check-and-ball design allows the attached ball valve to be closed so the check valve can be removed for cleaning or inspection.
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