Fire Sprinkler Service Portable Extinguishers and Backflow Repair 38: Fire Extinguishers are due for service. (4) 5lb ABC are due for hydro (4) 5lb ABC are do for 6 year service Febco 825YD 0012151309 BFP-1 Basement in the mechanical room: Backflow failed testing. Check Valves 1 & 2 leak - Recommend full rebuild. ***Main domestic - Must coordinate time for water shut off. 4" Febco 825YD Serial #0012151309 Located in basement in mechanical room.