Ranked by decibels: noise first, airflow secondQuietest we list: CAT-1P1060S · 56 dB
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Best compressed air dryers for air compressors

This page covers compressed air dryers for air compressors, not hand or hair dryers. Most garages should start with a water separator/regulator such as the NANPU DFR-03 Dual Filter + Regulator, add a desiccant dryer like the PneumaticPlus DFD-10 Desiccant Filter Dryer at the paint gun, and only move to a refrigerated dryer such as the Schulz Refrigerated Air Dryer, 35 CFM for 60–80 gallon shop compressors and paint booths.

Last updated October 18, 20266 products comparedBy the Silent Air Compressor editors · How we pick

Why compressed air is wet

Air always contains water vapor. When a compressor squeezes air into a tank, that vapor condenses as it cools. A large compressor in a humid shop can make a surprising amount of water in a day. Left alone, it rusts tanks and tools, washes oil out of air motors and ruins paint finishes.

Three levels of drying

TypeWhat it removesBest for
Water separator / filter-regulatorLiquid water droplets and particlesEvery compressor: nailing, air tools, inflation
Desiccant dryerRemaining water vapor, by absorbing it into beadsPoint-of-use before spray guns, airbrushes, plasma cutters
Refrigerated dryerMost water vapor, by chilling the air and draining condensate60–80 gallon shop compressors, paint booths, whole-shop air

Where each one goes

Put the separator or refrigerated dryer close to the compressor outlet, after a short length of pipe that lets the air cool. Put desiccant cartridges at the point of use, right before the tool or gun. Drain the tank daily either way, and see our refrigerated dryer sizing guide for shop systems.

Pair your dryer with the right air compressor filters.

How to drain an air compressor tank

Safely remove condensed water from a compressor tank to prevent rust and wet air.

You'll need: Drain pan or absorbent pad, Safety glasses.

  1. Switch off and unplug. Turn the compressor off at its switch and unplug it (or switch off the breaker on hard-wired units).
  2. Lower the pressure. Pull the regulator to zero, then bleed most of the tank pressure through a blow gun or by opening the drain slightly, so water isn't blasted out at full pressure.
  3. Open the drain valve. Open the drain valve at the lowest point of the tank and let water and air escape into a pan or onto an absorbent pad. Wear eye protection.
  4. Tilt if needed. On portable units, tilt the compressor gently toward the drain so pooled water can run out.
  5. Close the valve. When only dry air comes out, close the drain valve finger-tight.

Our picks

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  1. 1
    NANPU

    NANPU DFR-03 Dual Filter + Regulator

    An inexpensive two-filter-plus-regulator combo that catches bulk water and particles at the compressor outlet. It's the first piece of air treatment most garages need.

    Type
    Two-stage filter/water separator with regulator
    Ports
    3/8" NPT

    Pros

    • Two filtration stages plus a regulator in one unit
    • Semi-automatic drains
    • Very popular, low cost

    Cons

    • Removes liquid water, not water vapor, so it isn't a true dryer
    • 3/8" ports limit flow on big compressors

    Suits: California Air Tools 10020C, California Air Tools 20020, DEWALT DXCM271 27 Gallon Vertical

    Check price on AmazonUnder $150 · price checked October 18, 2026
  2. 2
    PneumaticPlus

    PneumaticPlus DFD-10 Desiccant Filter Dryer

    A small inline desiccant cartridge that goes right before a spray gun or air tool to remove remaining moisture vapor.

    Type
    Inline desiccant dryer

    Pros

    • Removes moisture a water separator can't
    • Color-change beads show when to replace
    • Inexpensive point-of-use protection

    Cons

    • Beads saturate quickly without a separator upstream
    • Small capacity

    Suits: California Air Tools 4620AC, California Air Tools 10020C

    Check price on AmazonUnder $150 · price checked October 18, 2026
  4. 4
    NANPU

    NANPU 3/4" Industrial Filter Dryer Regulator

    A 3/4" NPT multi-stage filtration and regulation set sized for 60–80 gallon shop compressors, rated to 175 PSI.

    Type
    Industrial filter, coalescing filter and regulator set
    Ports
    3/4" NPT

    Pros

    • 3/4" ports suit high-CFM shop compressors
    • Rated to 175 PSI
    • Multiple filtration stages

    Cons

    • Not a refrigerated dryer: still pair with one for paint booths
    • Bulky

    Suits: Ingersoll Rand 2340L5-V Two-Stage, Quincy QT-54 Two-Stage, California Air Tools CAT-60040CAD

    Check price on AmazonUnder $150 · price checked October 18, 2026
  5. 5
    Milton

    Milton 1170 Compact Desiccant FRL

    Milton's compact desiccant dryer with filter, regulator and lubricator. It's a professional all-in-one air treatment station for a shop wall.

    Type
    Desiccant dryer with filter, regulator and lubricator
    Ports
    1/2" NPT

    Pros

    • Desiccant drying plus filtration in one assembly
    • From an established US air-fittings brand

    Cons

    • Expensive
    • Lubricator section must be bypassed for paint lines

    Suits: California Air Tools 20020, DEWALT DXCM271 27 Gallon Vertical, Ingersoll Rand SS3L3 Single-Stage

    Check price on Amazon$300–$600 · price checked October 18, 2026
  6. 6
    Schulz

    Schulz Refrigerated Air Dryer, 35 CFM

    A 35 CFM refrigerated dryer that Schulz sizes for 7.5–10 HP compressors. It comfortably covers any 5 HP shop compressor on our list.

    Type
    Refrigerated compressed air dryer
    Rated flow
    35 SCFM

    Pros

    • Refrigerated drying removes far more moisture than filters
    • 35 CFM covers every 60–80 gallon unit we list
    • Established compressor manufacturer

    Cons

    • Expensive
    • Few Amazon reviews: refrigerated dryers are a niche purchase

    Suits: Ingersoll Rand 2340L5-V Two-Stage, Quincy QT-54 Two-Stage, California Air Tools CAT-60040CAD, Campbell Hausfeld XC802100 80 Gallon Two-Stage

    Check price on Amazon$600–$1,500 · price checked October 18, 2026

Compressors these suit

Frequently asked questions

Do I need an air dryer for my air compressor?

For nailing and inflation, a simple water separator plus daily tank draining is enough. For painting, sandblasting or plasma cutting, add a desiccant dryer at the tool; for large shop systems, use a refrigerated dryer.

What is the difference between a desiccant and a refrigerated air dryer?

A desiccant dryer absorbs moisture into beads that must be replaced or regenerated; it reaches very dry air but has limited capacity. A refrigerated dryer chills the air to condense water out continuously and suits larger compressors.

How often should I drain my compressor tank?

After every use for portable compressors, and at least daily for shop compressors, or fit an automatic drain valve.

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