CP0004 | Backfill tamper

Chicago Pneumatic CP 0004 Pneumatic Backfill Tamper

Proper backfill compaction is what keeps foundations stable, trench lines from settling, and finished surfaces from cracking down the road. The Chicago Pneumatic CP 0004 is a heavy-duty air-powered backfill tamper designed for exactly that job, giving contractors and utility crews a dependable way to compact soil in trenches and around foundations, footings, and other structures.

Built for Tough Soils and Heavier Jobs

Not every soil compacts the same way. Cohesive materials like clay, along with soils high in finely crushed or powdered material, resist compaction and often call for more force than lighter tampers can deliver. The CP 0004 uses slow, powerful blows to drive energy deeper into the lift, compacting these difficult materials efficiently while still performing well on granular backfill. With its larger bore and ring valve design, it steps up from lighter-duty tampers for medium to heavy applications where consistent density matters.

Engineered for Long Service Life

Backfill tampers work in dusty, abrasive conditions every day, so durability is built into the CP 0004 from the inside out. A heat-treated cylinder and chrome plated piston resist wear and significantly extend tool life. Adjustable packing maintains a positive air seal over time, helping the tool keep its hitting power as it ages. An integral oiler continuously lubricates internal components during operation, reducing wear between maintenance intervals.

Designed Around the Operator

Long days in the trench are easier with a tool that handles well. The CP 0004 is well-balanced and smooth-operating, so a single operator can guide it with control. An exhaust deflector directs air, moisture, and oil away from the operator, keeping the work area cleaner and more comfortable. When the butt wears, the aluminum butt is held in place with a clamp screw for quick, easy replacement on the jobsite. For crews working in noise-sensitive areas, an optional muffler is available for quieter operation.

Trusted Chicago Pneumatic Quality

Chicago Pneumatic has been building pneumatic tools for construction and industrial work for over a century, and the CP 0004 reflects that experience. For best results, run the tamper at the recommended 90 psi air supply, compact backfill in thin lifts rather than one deep pass, and keep the oiler filled to protect internal components throughout the workday.