# Compressed Air Regulator, Air Inlet Size 3/8 in, Air Inlet Type NPT, Maximum Flow Rate 25 cfm, Maximum Operating Pressure 300 psi, Maximum Operating Temperature 125 Degrees F, Pressure Gauge Included Yes, Adjustment Mechanism Knob, Overall Width 2 5/8 in, Adjustment Location Top, System Location Main Line, Series A-4000, Air Inlet Gender Female, Air Outlet Gender Female, Air Outlet Size 3/8 in, Air Outlet Type NPT, Body Material Plastic, For Fluid Type Air, For Substance Type Air

**Manufacturer:** Johnson Controls  
**MPN:** `A-4000-138`

The Johnson Controls A-4000-138 Pressure Reducing Station features a wall mounting bracket for secure installation. The gauge measures pressure from 0 to 30 psig. An adjustable pressure knob allows for precise control. A pressure relief valve is factory set at 25 psig, but can be adjusted if needed. The station includes 3/8" O.D. compression elbow fittings on both high and low pressure sides for efficient connections.

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Johnson Controls |
| Manufacturer name | Johnson Controls |
| Manufacturer | Johnson Controls |
| CategoryId | 5854 |
| CategoryIdL1 | 12 |
| CategoryIdL2 | 8750 |
| CategoryIdL3 | 5854 |
| CategoryL1 | Power Transmission |
| CategoryL2 | Compressors, Air Tanks & Pneumatic Parts |
| CategoryL3 | Pneumatic Valves |
| CategoryL4 | Vacuum & Pressure Relief Valves |
| DimensionUnit | inch |
| GraingerSku | 38Y087 |
| UPC | None |
| UnitOfMeasure | EA |
| Weight | 2.45 |
| WeightUnit | lbs |
| cali_prop65_orglabel | False |
| cali_prop65_whtlabel | False |
| countryOfOrigin | MX |
| height | 5.5 |
| jsonUrlData | 924526ffbdad25e5923b |
| length | 13.4 |
| moq | 1 |
| MPN | A-4000-138 |
| multiple | 1 |
| qtyInStock | 40 |
| qtyInStockOverride | -2 |
| SKU | G5064096 |
| tierMinQty1 | 1 |
| tierPrice1 | 367.99 |
| url | https://www.zoro.com/johnson-controls-pressure-reducing-station-a-4000-138/i/G5064096/ |
| width | 5.8 |
| Overall Height - Regulators | 5.9 in |
| Pipe Size - Regulators | 3/8 in |
| Overall Width - Regulators | 2.63 in |
| Overall Width | 2 5/8 in |
| Inlet Size (Combined) | 3/8 in NPT |
| Overall Height | 5 7/8 in |
| Air Inlet Size | 3/8 in |
| Air Outlet Size | 3/8 in |
| Overall Depth | 2 5/8 in |
| Item | Compressed Air Regulator |
| Preset Setting (PSI) | 25 |
| Max Flow - Regulators | 25 cfm |
| Body Material | plastic |
| Flow Capacity (CFM) | 25 |
| Includes | Mounting bracket |
| (F)NPT Outlet (In ) | 3/8 |
| Adjustment Range - Regulators | 0 to 30 psi |
| (M)NPT Inlet (In ) | 3/8 |
| Max Inlet Pressure - Regulators | 300 psi |
| Pressure Range (PSI) | 0 to 30 |
| Maximum Operating Temperature | 125 Degrees F |
| Maximum Operating Pressure | 300 psi |
| Pressure Control Range (Combined) | 0 psi to 30 psi |
| Maximum Regulated Pressure | 30 psi |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Zoro | G5064096 | 367.99 | 1 | 40 | 1 |
| Grainger | 38Y087 |  |  | None | 1 |
| SupplyHouse | A-4000-138 |  |  | None | 1 |
| Radwell | A-4000-138 | 320.0 | 1 | 3 | 1 |
| Raptor Supplies | AH8QUA | 637.492869 | 1 | None | 1 |
| Zoro | G7031185 | 393.27 | 1 | None | 1 |
| h-mac.com | JOHNSON-CONTROLS-NU-A-4000-138 |  |  | None | 1 |
| Voomi Supply | A-4000-138 | 387.72 | 1 | None | 1 |
| sustainablesupply.com | C1679067 | 309.56 | 1 | None | 1 |
| sustainablesupply.com | C2088314 | 309.56 | 1 | None | 1 |
| simsupply.com | ZO-G5064096 | 435.57 | 1 | None | 1 |
| midwestapplianceparts.com | A-4000-138-JO-P | 340.73 | 1 | None | 1 |
| furnacepartsource.com | A-4000-138 | 403.88 | 1 | None | 1 |
| cappusa.com | 775300 | 335.64 | 1 | 1 | 1 |
| Kele | A-4000-138 | 566.28 | 1 | None | 1 |
| gsistore.com | A-4000-138 | 346.6 | 1 | 6 | 1 |
| hvacdiscountstore.com | JOH--A-4000-138 | 318.08 | 1 | 15 | 1 |
| waterpumpsnow.com | A-4000-138 |  |  | None | 1 |
| homeessentialsdirect.com | A-4000-138 | 224.54 | 1 | None | 1 |
| Galco | A-4000-138-JHSN | 433.64 | 1 | None | 1 |
| industrialstores.com | A-4000-138 | 410.34 | 1 | None | 1 |
| grainger.ca | JHCA4000138 |  |  | None | 1 |
| blackhawksupply.com | A-4000-138 | 339.03 | 1 | None | 1 |
| alliedcontrols.com | A-4000-138 | 314.18 | 1 | None | 1 |
| associatedcontrolsinc.com | A-4000-138 | 141.93 | 1 | None | 1 |

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Structured data: `/python/html6/product/500/226500000/226830000/part_--A4000138---JohnsonControls--a8ce270821.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp