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The AAA 8.7GA12 is a direct drive horizontal triplex plunger pump rated at 3400 PSI max pressure @ 2.5 GPM max water flow. The AAA 8.7GA12 has a forged brass manifold for strength and durability. It is designed with a gas engine flange and 3/4 hollow shaft that fits most horizontal shaft engines. All AAA pumps come pre-filled with oil and are equipped with thermal relief protection to prevent pump overheating. Designed with a threaded M22 pump outlet for easy connection to the pressure hose and an easy start feature to make start up a breeze. The crankcase is manufactured from fully anodized die cast aluminum for corrosion protection and is sealed to prevent contamination and lube failure. High performance double seal system prevents water leaks. Dual oversized radial ball bearings are installed for better wear and friction resistance and precision ceramic coated pistons for extended seal life. The oversized site glass and advanced oil seal technology does away with the need for a dipstick. It also comes equipped with patent pending PowerBoost Technology to enhance cleaning performance reduce vibration and heat to deliver a better working environment for the operator while extending engine and pump life. All AAA pump kits come complete with detergent injection siphon tube with filter for chemical cleaning new mounting bolts and 3/16 shaft key.