Protocol Plumbing and Heating LLC is a NYC based Licensed Master Plumber servicing the NYC 5 Boroughs for all your Commercial and Residential Plumbing and Heating needs. 1.NYC Licensed Master Plumber# 2569 2.Certified Backflow Prevention Technician #14769 3.DOB Certified FULL Gas Work Authorization 4.Operator Qualified Task 86 & 87 (LL152 Gas Inspections and Repair) 5.NYC SST OSHA Approved Site Safety Training