SIZE 2.75" UNLOADER VALVE FOR PRESSURE WASHER REPLACES FITS 16030 4-BOLT MANIFOLD WORKS FOR FAIP PUMPS PK16860 PK18048 PP3WZ1606. REPLACES PART NUMBERS 190594GS AND 190628GS CHECK YOUR MANIFOLD, (THAT IS THE PIECE THIS UNLOADER MOUNTS INTO) IF IT HAS 4 MOUNTING BOLTS THAT ATTACH THE MANIFOLD TO THE PUMP, THIS IS THE CORRECT UNLOADER. IF IT HAS 5 MOUNTING BOLTS, THIS WILL NOT FIT!Warning:Lead-Nickel-Cancer and Reproductive Harm