The 25 series has been updated over the years. Older Harris 25 models have a seat assemble that consist of several individual parts. The newer Harris 25 models use an encapsulated seat assemble (Cartridge). Also, some of the older Harris 25 models have a fine thread 1/2-27 inlet connection, not a 1/4 NPT which is standard on all newer models.
Please verify which Harris 25 series regulator you have before purchasing inlet connection or repair kit.
Our repair kit #H25-500-RK will repair all older Harris 25 HP regulators. These older 25 regulators can be identify by the use of 5 individual parts in the seat assemble (Part #8-12 in the drawing to the left). Kit includes the following original Harris parts: Valve Seat #9100774, diaphragm Slip Ring #9001230, and Diaphragm #9100251.