Would you specify a valve that will have a significant leak after one year in service? If not, then what specifications do you use?
The typical valve standard,
FCI 70-2 Class V when applied to a 4 inch, Class 1500 valve,
allows a valve to leak 608 gallons per year. If most valves are allowed to leak that much when new, then imagine how much a typical valve leaks after one year!
ValvTechnologies
guarantees Zero Leakage for four years. All other valves in the industry have a defined leakage rate. ValvTechnologies tests every valve made according to ANSI procedures. However, we toughen the standard to zero leakage on both water and gas. Our standard is zero drops and zero bubbles guaranteed.