We have had several requests from customers to have leaking sprinkler systems treated/coated to stop pin hole leaks and prevent future issues. Our local water is extremely soft and corrosive causing excessive pin hole leaks, typically in domestic water systems. There is a local company providing epoxy coating services for existing sprinkler systems and another who intends to use a mineral based wash to produce an internal lining on the sprinkler systems. The epoxy lining company claims "Pipe cleaning and coating process are conducted in accordance with ANSA/AWWA Standard No. C210-97 and *X Companies* technical guidelines" and that they are an "Official member of the NFPA"
Does NFPA have any regulations or guidance regarding this type of practice? Would such a treatment contradict any NFPA standards? At the very least I would assume that all installed sprinkler heads must be replaced following such a treatment..