Sprinkler Inspection Deficiency: 5 year internal inspection and gauge replacement due 5 year FDC hydro test due 3 year pressure test due Upright Heads are due to be sent out for UL testing ( 50 years) 1974 5 year internal inspection 5 year FDC ( check valve is in basement) Tem 6 threads same as Pittsburgh 6 3 year pressure test 3 air gauges Pull 8 upright heads basement and 3rd Floor ( 212 degree 4.0 K factor)