Oil-Less Tank Mounted Air Compressors For Dry Pipe & Pre-Action Fire Sprinkler Systems
General Air Products’ newly improved OLT Plus Series Oil-Less Tank Mounted Fire Protection Air Compressors are specifically designed to fill dry and pre-action systems to supervisory pressure within 30 minutes per NFPA 13. Tank mounted oil less air compressors are recommended as the ideal air compressor type for dry pipe sprinkler system applications. We highly recommend a tank mounted compressor when an accelerator is required on the dry pipe sprinkler system.
All of our OLT Plus single phase standard units are UL 1450, Supplement SC listed for fire protection. We include a 30” braided stainless steel flex hose and 4 vibration isolation pads to allow for a fast and easy installation. Our standard OLT Plus series units are single phase, pre-wired, adjustable up to 60 psi, and factory pre-set. High pressure, 3 phase, and 50 Hz OLT Plus Series units are also available.
The OLT Plus Series Oil Less Tank Mounted Fire Protection Air Compressors cover 30 minute fill up times on sprinkler systems up to 1225 gallons in size.
Each individual system requires an Air Maintenance Device (Model AMD-1) per NFPA 13 when using a tank mounted air compressor. Multiple dry valves may be supplied from a single tank mounted air compressor when using our AMD-1 air maintenance device on each system.
Lead Time: 1 week to ship
OLT915 -OLT1225 : 5 weeks to ship.
For large orders & exact lead times, please consult factory.
Note: As of April 14th 2025 we altered our fire protection air compressor model numbers. Obsolete models have been replaced by the new models below. If you need technical information on the obsolete fire protection air compressors click here.
Note: For any compressor acquired before 2021, click here for technical information.
ANNUAL MAINTENANCE REMINDERS
Do you know when your Fire Protection Air Compressor is due for maintenance?
Model Number | System Capacity | Order Maintenance Kit | Engineering Submittal Package | Wiring Guide | Cut Sheet |
|---|---|---|---|---|---|
120 |  |  |  | | |
250 | | | | | |
400 | | | | | |
500 | | | | | |
600 | | | | | |
915 | | | | | |
1100 | | | | |
Click on the model numbers to find additional product information and to order maintenance kits
Model Number | System Capacity | Order Maintenance Kit | Wiring Guide | Cut Sheet |
|---|---|---|---|---|
400 | | | | |
500 | | | | |
600 | | | | |
915 | | | | |
1100 | | | |
Click on the model numbers to find additional product information and to order maintenance kits
Model Number | System Capacity | Order Maintenance Kit | Engineering Submittal Package | Wiring Guide | Cut Sheet |
|---|---|---|---|---|---|
120 | | | | | |
250 | | | | | |
400 | | | | | |
500 | | | | | |
600 | | | | | |
915 | | | | | |
1100 | | | | |
Model Number | System Capacity | Order Maintenance Kit | Engineering Submittal Package | Wiring Guide | Cut Sheet |
|---|---|---|---|---|---|
120 | | | | | |
250 | | | | | |
400 | | | | | |
500 | | | | | |
600 | | | | | |
915 | | | | | |
1100 | | | | |
Click on the model numbers to find additional product information and to order maintenance kits
Model Number | System Capacity | Order Maintenance Kit | Engineering Submittal Package | Wiring Guide | Cut Sheet |
|---|---|---|---|---|---|
400 | | | | | |
500 | | | | | |
600 | | | | | |
915 | | | | | |
1100 | | | | |
Click on the model numbers to find additional product information and to order maintenance kits
Model Number | System Capacity | Order Maintenance Kit | Engineering Submittal Package | Wiring Guide | Cut Sheet |
|---|---|---|---|---|---|
120 | | | | | |
250 | | | | | |
400 | | | | | |
500 | | | | | |
600 | | | | | |
915 | | | | | |
1100 | | | | |
Not sure which air compressor you need?
Answer a few simple questions about your sprinkler system and our Air Supply Builder will help you find the right General Air Products compressor, accessories, and technical documentation.
- Find the right model for your system
- Download the corresponding cut sheet
- Copy and paste a ready-to-use specification
Build the right air supply for your dry or pre-action sprinkler system
Based on your selections
Are you supervising one or multiple risers?
Do you prefer oil-less or lubricated operation?
How will the compressor be mounted?
Look for the UL 1450, Supplement SC listing label (red sticker) on the unit to confirm compliance. To meet NFPA 13 (2025) requirements, a fire protection air compressor shall be listed for fire protection use. You can read more about UL 1450, Supplement SC in our article
UL 1450 is a general safety standard covering motor-operated air compressors, vacuum pumps, and painting equipment. UL 1450, Supplement SC is a stricter certification specifically for fire protection air compressors, ensuring they meet the higher performance and reliability requirements of fire sprinkler systems. You can read more about UL 1450, Supplement SC requirements here
Fire protection air compressors must restore system pressure within 30 minutes per NFPA 13. Compressor sizing is based on system volume (gallons), and for multiple risers, the largest system should be used for sizing.
Oil-less compressors require less maintenance and are ideal for most applications. Lubricated compressors require regular oil changes but may offer durability in certain conditions.
Riser-mounted compressors save space, while tank-mounted compressors are required for systems serving multiple risers per NFPA 13 (2025) 8.2.7.5.1.
Advance Series compressors feature a digital pressure switch with advanced monitoring capabilities, while Plus Series compressors use a traditional mechanical pressure switch.
General Air Products Digital pressure switches provide real-time system data including pressure, run hours, and cycles, and allow for easy adjustments during installation and maintenance. In addition they have fewer moving parts, often providing better long term reliability.
The ideal air supply depends on your application: compressed air for general use, dry air for cold storage to prevent freezing, and nitrogen generators or Vapor Pipe Shield for corrosion mitigation.
Maintenance kits for General Air Products compressors are available through authorized distributors or directly from General Air Products. You can find your local General Air Products distributor through our distributor locator tool or use our maintenance kit lookup tool
Fire protection air compressors should be maintained annually in accordance with NFPA 25 and manufacturer recommendations to ensure system reliability and compliance. Maintenance kits can be purchased through your local distributor or through our maintenance kit lookup tool
If you experience issues with your fire protection air compressor, contact General Air Products technical support at 1-800-345-8207 or through the chat feature in the lower right corner for expert assistance - from a real live person, we promise 🙂
General Air Products compressors are available through our nationwide network of fire protection distributors. Use our distributor locator to find a supplier near you.
All General Air Products fire protection air supplies include a standard 1-year manufacturer warranty. Contact us or refer to product manuals full warranty details.
Replacement parts are available through authorized distributors or directly from General Air Products below each product page. Contact technical support at 1-800-345-8207 or through the chat feature in the lower right corner if you need help identifying parts.
Q Series air compressors operate at approximately 50–55 decibels, making them significantly quieter than traditional compressors and ideal for noise-sensitive environments.
Fire Sprinkler System Training
The National Fire Sprinkler System Training Center at General Air Products is located in Exton, Pennsylvania. This NICET recognized training facility is state-of-the-art and features fire sprinkler products from several manufacturers in the fire protection industry allowing attendees to get hands-on with a variety of live equipment. We also offer virtual training and webinars online.