Prevost ALTO 4 Filter-Regulator — 3/4" & 1" FNPT, 7–145 PSI
The Prevost ALTO 4 filter-regulator combines water separation, particulate filtration and pressure regulation in a single 3/4" or 1" body. It is the high-flow answer to the popular Prevost ATU filter-regulators, which stop at 1/2" — if you have outgrown a 1/2" unit, this is the Prevost part that replaces it.
Combining both functions in one module saves you a fitting, a nipple and roughly half the wall space of a stacked filter plus regulator. The relieving diaphragm regulator vents excess downstream pressure when you dial the setting back, the knob locks by pushing down, and a 1/4" gauge port accepts a gauge on either side. Condensate dumps through a manual push-button drain.
Specifications
- Port sizes: 3/4" FNPT and 1" FNPT
- Flow rate: 150 CFM (3/4") / 177 CFM (1") at 87 psi, ΔP = 14 psi
- Adjustment range: 7 to 145 psi
- Regulator type: Relieving diaphragm, lockable knob
- Gauge port: 1/4" (gauge sold separately)
- Drain: Manual push-button
- Body: Aluminum alloy with metal bowl guard
- Replacement element: Prevost TF C45, 25 micron
- Series: Prevost ALTO 4 air treatment module
Available Variants & SKUs
| SKU | Port Size | Flow Rate |
|---|---|---|
| TM 204 | 3/4" FNPT | 150 CFM at 87 psi (ΔP = 14 psi) |
| TM 205 | 1" FNPT | 177 CFM at 87 psi (ΔP = 14 psi) |
Flow ratings are taken from the Prevost 2026 US price list. If you need more than 150 CFM on a 3/4" port, step up to the 1" TM 205 and reduce at the outlet, or run a separate ALTO 4 filter and regulator.
NOTE: Actual product may be different from pictured!
Financing Options
Financing Options
We offer Financing Through Many Different Avenues:
- Affirm is great for smaller purchases. You can do this during checkout.
- Clicklease is a great option for Instant decisions up to 25k. NO Hard credit pull. No Time in Business Required. More information can be found out about it here: https://www.clicklease.com/partner/warthog-air-compressor-store
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