While 4JN (Neoprene) and 4J (EPDM) sleeves share the same physical dimensions and torque ratings for size 4 flanges

the silver-colored R9110-36 ensures the straight-thru-flow performance that Maxitrol is known for

and LGB series units

With a wide adjustable timing range from 1

supporting various high-demand commercial control circuits

York S1-1PS0309 Pressure Switch Els PW 17895 While 4JN (Neoprene) and 4JThe York S1 1PS0309 Pressure Switch is an OEM specified safety component engineered for high altitude gas furnace installations. This SPST pressure switch is calibrated to a fixed setpoint of 0. 90" WC (water column), ensuring the inducer motor maintains the critical vacuum thresholds necessary for safe flue gas venting in low density air environments. Designed for precise atmospheric monitoring, this switch replaces standard units to prevent nuisance