UL 312:2018 PDF Download

The UL 312:2018 Standard specifies the requirements for check valves of 1 NPS and larger used in water piping systems for fire-protection services. These check valves are intended for installation in accordance with various National Fire Protection Association standards such as NFPA 11 for low-, medium-, and high-expansion foam, NFPA 13 for installation of sprinkler systems, NFPA 14 for installation of standpipe and hose systems, and NFPA 15 for water spray fixed systems for fire protection, among others.

This standard sets out the construction requirements and testing procedures to ensure that check valves meet the safety and performance requirements necessary for fire protection. Check valves play an essential role in ensuring that water is supplied to the fire protection system in the event of a fire, and they provide protection by preventing the backflow of water which could potentially contaminate the water supply or damage the equipment.

The UL 312:2018 Standard helps ensure that check valves for fire protection service are designed and manufactured to meet the necessary safety requirements, and it ensures that these valves will operate effectively when needed. Additionally, adherence to this standard helps to ensure that the installation and use of these valves is consistent with other relevant National Fire Protection Association standards.