What would cause a reduced pressure zone backflow preventer to leak?
Leakage from a backflow preventer is normally attributed to foreign matter lodging on the seating area of either the first or second check valve. Most times this can be corrected by simply flushing the valve that will dislodge any loose particles. It is, therefore, most important on new installations that the piping be thoroughly flushed before installing the unit. It should be remembered, however, that spillage does provide a “warning signal” that the valve is in need of maintenance. Q: Is periodic testing required for reduced pressure zone backflow preventers? A: Yes, and this is to ensure that the valve is working properly and is a requirement of many states and cross connection control programs. Test cocks are provided on the valve for this purpose and manufacturers are required to furnish field-testing information. Q: Should a backflow preventer be installed in the water supply line to each residence? A: Because of the growing number of serious residential backflow cases, many wat
