Ranked by decibels: noise first, airflow secondQuietest we list: CAT-1P1060S · 56 dB
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Air compressor replacement parts

The most common air compressor replacement parts are the pressure switch, check valve, regulator and pump ring kit. Match the symptom to the part, then match the part to your compressor's model number before ordering.

Last updated October 18, 20265 products comparedBy the Silent Air Compressor editors · How we pick

Symptom to part

SymptomLikely partExample
Motor won't start, or won't shut off at cut-out pressurePressure switchSecbolt Pressure Switch with Regulator and Gauges
Air hisses from the unloader when stopped; motor struggles to restartCheck valveHromee 1/2" In-Tank Check Valve Kit
Pump runs but builds pressure slowlyRings/cylinder (oil-free) or valvesRing kit for your pump model
Outlet pressure creeps or leaks from the regulatorRegulator or rebuild kitRegulator repair kit

Want to understand what each part does first? See our labeled parts of an air compressor diagram, plus guides to the check valve and relief valve.

Safety: unplug the compressor and drain the tank completely before loosening any fitting. Never replace or adjust a safety relief valve with one rated for higher pressure. Leave tank damage (rust-through, dents, leaking welds) and motor wiring to a qualified technician; a damaged tank should be retired, not repaired.

Our picks

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  1. 1
    Secbolt

    Secbolt Pressure Switch with Regulator and Gauges

    A replacement pressure switch, regulator and gauge manifold for small single-phase compressors, one of the most common failed parts.

    Type
    Replacement pressure switch, regulator and gauge assembly

    Pros

    • Replaces switch, regulator and gauges in one assembly
    • Very popular replacement part

    Cons

    • Match pressure range and current rating to your compressor
    • Electrical work: disconnect power first
    Check price on AmazonUnder $150 · price checked October 18, 2026
  2. 2
    Hromee

    Hromee 1/2" In-Tank Check Valve Kit

    A brass check valve kit for compressors whose pump bleeds down or won't restart under load. That's a classic failed-check-valve symptom.

    Type
    Brass in-tank check valve kit
    Ports
    1/2" MNPT

    Pros

    • Brass body
    • Includes fittings for common layouts

    Cons

    • Depressurize the tank fully before removing the old valve
    Check price on AmazonUnder $150 · price checked October 18, 2026
  3. 3
    Aftermarket

    K-0650 Cylinder Sleeve and Ring Kit

    A cylinder sleeve and ring kit for many PORTER-CABLE, Craftsman and DeVilbiss oil-free pumps, the usual fix for a pump that runs but builds pressure slowly.

    Type
    Cylinder sleeve and compression ring kit

    Pros

    • Restores compression on worn oil-free pumps
    • Low cost

    Cons

    • Fitment varies: match the pump model number

    Suits: PORTER-CABLE C2002 6 Gallon Pancake, CRAFTSMAN 6 Gallon 150 PSI Pancake

    Check price on AmazonUnder $150 · price checked October 18, 2026

Compressors these suit

Frequently asked questions

How do I find the right replacement part for my compressor?

Find the model and serial number on the compressor's data plate, then match the part to that model. Pressure switches must also match the pressure range and current rating; check valves must match thread size and type.

Is it worth repairing an old air compressor?

Cheap parts like pressure switches, check valves and regulators are almost always worth replacing. A worn pump on a budget compressor may cost close to a new compressor. Any compressor with a rusted or damaged tank should be retired.

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