The 24K927 PTFE Seat O-Ring Kits from Graco that include:

Port: 1/2" NPT

you can mount it on either side of the cabinet

82m) inlet duct extension

Comet R4508 PUMP LWS 2020 E 21.67 cubic feet The 24K927 PTFE Seat O-RingSmall Frame 1750 RPM 2. 2 GPM @ 2000 PSI Hollow Shaft Electric Engines 5 8" Triplex Electric Replacement Pressure Washer Pump Features Forged Bronze Connecting Rods with Lifetime Warranty Hardened Stainless Steel Piston Guides High Efficiency Stainless Steel Check Valves Abrasion Proof, Heat Resistant, Industrial Ceramic Plungers High Quality Buna Textile Double Sealing V Packings Die Cast, Anodized Aluminum Crankshaft Fin Design for Optimal Operating