SIMPSON® 8.7GA12 3400 psi 2.5 GPM AAA Triplex Plunger Horizontal Pump with Brass Head and Powerboost Technology
MANIFOLD KIT BRASS C31 SERIES AAA PUMP
AAA Triplex Pressure Washer pump spewing water from vent hole in top of pump housing. There are three vent holes in the top of housing. I've researched a lot trying to find