30821 Valve Kit – Fits Cat Pumps 310, 340, 350 & 5CP Series

Part Number: 30821
Category: Pressure Washer → Pump Repair Parts
Type: Valve Kit – Genuine OEM Replacement for CAT Pumps 310, 340, 350 & 5CP Series

The 30821 Valve Kit is a genuine OEM CAT Pumps valve kit engineered for reliable performance and long service life in CAT Pumps 310, 340, 350, and 5CP Series plunger pumps. Manufactured with 304 stainless steel components and Buna-N sealing elements, this kit is designed to restore proper pump operation, improve sealing efficiency, and maintain consistent pressure in demanding pressure washer and industrial applications.

Compatibility

Fits the following CAT Pumps models and series:

• 310

• 340

• 350

• 5CP Series

Product Details

Brand: CAT Pumps
OEM: Yes – Genuine CAT Pumps Part
Application: Pump Valve Replacement / Pump Rebuild
Material: 304 Stainless Steel Valves & Springs, Buna-N O-Rings

Kit Contents

• (3) 44565 – Spring Retainer

• (3) 43750 – Valve Spring (304 Stainless Steel)

• (3) 43723 – Valve (304 Stainless Steel)

• (3) 43725 – Valve Seat (304 Stainless Steel)

• (3) 43358 – Valve Seat O-Ring (Buna-N)

• (3) 48361 – Valve Seat Back-Up Ring

• (3) 17615 – Valve Plug O-Ring (Buna-N)

Key Features

• Genuine CAT Pumps OEM valve kit

• Designed for 310, 340, 350 & 5CP Series pumps

• Corrosion-resistant 304 stainless steel valves and springs

• Buna-N O-rings provide dependable sealing

• Restores proper pressure, flow, and pump efficiency

• Exact OEM replacement — no modifications required