Valve Rebuild Kit Fits Brand Watts For Use With Grainger Item Number 54EF50 54EF51 54EF52 For Use With Mfr Model Number 1-624XLC 1-625XL 1-625XLSULU Includes Bolt Cap Diaphragm Diaphragm Disc Disc Friction Ring Locknut O-Ring Screen Seat Washer Spring Stem Union Nut Repair Part Size 1 in 1 in Thread Size Inlet (In.) 1 in Material of Construction Brass Rubber Steel Temp Range 33 Degrees to 140 Degrees F Replaces 25AUB For Use With Pressure Reducing Valves