In each of the following organizations, standards are developed by committees consisting of consumer, general interest and manufacturing members:
- American National Standards Institute (ANSI)
- American Water Works Association (AWWA)
- American Society for Testing and Materials (ASTM)
- Underwriters Laboratories (UL)
- National Fire Protection Association (NFPA)
- National Sanitation Foundation (NSF)
- Factory Mutual (FM)
- Manufacturer’s Standardization Society (MSS)
Water Supply Service Standards
| Standard | Designation | Subject Covered |
|---|---|---|
| AWWA | C500 | Standard for Metal-Seated Gate Valves for Water Supply Service |
| AWWA | C502 | Standard for Dry-Barrel Fire Hydrants |
| AWWA | C503 | Standard for Wet-Barrel Fire Hydrants |
| AWWA | C504 | Standard for Rubber-Seated Butterfly Valves |
| AWWA | C508 | Standard for Swing-Check Valves for Waterworks Service |
| AWWA | C509 | Standard for Resilient-Seated Gate Valves for Water Supply Service |
| AWWA | C515 | Standard for Reduced-Wall, Resilient Seated Gate Valves for Water Supply Service |
| AWWA | C517 | Standard for Resilient-Seated Cast-Iron Eccentric Plug Valves |
| AWWA | C550 | Standard for Protective Interior Coatings for Valves and Hydrants |
Clow Valve products meet and exceed the requirements of all of the above national standards relating to manufacture and performance.
