Old Part Numbers: WL015303SJ, BT011901AV, BT012100AVIncludes belt, check valve, and bolt.SpecificationsAC0-High Temperature Belt Technical Specifications:    (Inches)       (mm)Outside Circumference     ...

Air compressor regulator without decal. 1/4" FPT inlet/outlet, 1/8" FPT side port for pressure gauge. If air leaks from the regulator, or when you turn the knob it doesn't adjust the PSI up or down, replace this part.

Old Part Numbers: AB-9053138, AB-9050373, ST070324AV, 90503731/4" MPT x 1.5" steel pipe nipple. Be sure to apply plumber's tape on the threads before installation.