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Sprinkler System Air Compressors
Sprinkler system air compressors maintain the air pressure that holds water back in dry pipe and pre-action fire sprinkler systems. CompressorPros carries UL/FM-listed fire sprinkler compressors from 1/2 to 5 HP in tank mount and base mount configurations on 115V, 230V, and three phase power. Standard shipping is free.
What Are Sprinkler System Air Compressors?
A sprinkler system air compressor maintains the supervisory air pressure in a dry pipe or pre-action fire sprinkler system. In these systems, the piping is filled with pressurized air rather than water. When a sprinkler head activates in a fire, the air pressure drops, a valve opens, and water floods the piping to suppress the fire. The compressor's job is to keep the air pressure at the required level at all times so the system is ready to respond. Sprinkler compressors are purpose-built for this application, with UL/FM-listed controls, automatic start-stop cycling, and designs that comply with NFPA 13 requirements for fire protection air supply.
Tank Mount vs. Base Mount
Tank Mount Sprinkler Compressors
Tank mount sprinkler compressors pair the motor and pump with an integrated 30 gallon ASME-rated air receiver. The tank provides an air reserve that reduces compressor cycling and helps maintain steady system pressure during minor air losses from leaks or system testing. Tank mount is the most common configuration for small to mid-size dry pipe and pre-action systems. The Jenny K15S-30UMS 1.5 HP 115 Volt Fire Sprinkler System Air Compressor serves smaller dry pipe systems on standard 115V power. The Jenny G5S-30UMS 5 HP 230 Volt Fire Sprinkler System Air Compressor is the largest tank mount option for bigger dry pipe zones.
Base Mount Sprinkler Compressors
Base mount sprinkler compressors ship without an integrated tank and connect to the sprinkler system's piping directly or to a separately provided receiver. Base mount is the standard for larger systems, retrofit installations where space is limited, and configurations where the air receiver is already part of the existing infrastructure. The Jenny F12S-BS 1/2 HP 115 Volt Base Mount Fire Sprinkler Compressor is the most compact base mount option, designed for small dry pipe zones and nitrogen generator backup. The Jenny G5S-BS-230/3 5 HP 230 Volt Three Phase Base Mount Fire Sprinkler Compressor serves large commercial and industrial dry pipe installations requiring three phase power.
115V vs. 230V
115V Sprinkler Compressors
115V models plug into a standard outlet and are available from 1/2 to 2 HP. They serve smaller dry pipe zones, mechanical rooms with basic electrical service, and retrofit installations where adding a 230V circuit is impractical.
230V and Three Phase Sprinkler Compressors
230V single phase models are available at 3 and 5 HP for mid-size and large dry pipe systems. The Jenny G3S-30UMS 3 HP 230 Volt Fire Sprinkler System Air Compressor is a mid-range option for systems that exceed the capacity of a 2 HP unit. Three phase (230V) base mount models are available at 5 HP for large commercial and industrial installations.
Key Specifications
- HP (Horsepower): Sprinkler compressors range from 1/2 HP for small zones and backup applications to 5 HP for large commercial dry pipe systems. The required HP depends on the total volume of the dry pipe system, the allowable fill time, and the supervisory pressure setpoint.
- Tank Capacity (Gallons): Tank mount models use 30 gallon ASME-rated receivers. Base mount models connect to the system piping or a separately provided tank.
- Max PSI (Pounds per Square Inch): Most sprinkler compressors are single stage units delivering up to 125-135 PSI. Supervisory air pressure in dry pipe systems is typically set at 15-50 PSI above the water supply trip pressure, so this output range is more than adequate.
- Voltage/Phase: 115V single phase for 1/2-2 HP. 230V single phase for 3-5 HP. 230V three phase for 5 HP base mount. Match to the electrical service available in the mechanical or riser room.
- System Type: Dry pipe systems hold air pressure to keep water behind a dry pipe valve. Pre-action systems use air pressure in combination with a detection system that must activate before the valve opens. Both system types use the same compressor hardware.
- UL/FM Listing: All sprinkler compressors carried by CompressorPros include UL-listed and FM-approved controls that meet NFPA 13 requirements for fire protection air supply equipment.
Brands Carried
- Jenny: The exclusive sprinkler system compressor brand on the site, with a complete line of UL/FM-listed fire sprinkler compressors from 1/2 to 5 HP in tank mount and base mount configurations. Jenny sprinkler compressors cover 115V, 230V single phase, and 230V three phase electrical service.
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FAQ
How do I size a sprinkler system air compressor? Sizing depends on the total volume of the dry pipe system (measured in gallons), the required fill time per NFPA 13, and the supervisory air pressure setpoint. A fire protection engineer or the system designer specifies the compressor HP and CFM requirements. CompressorPros carries models from 1/2 to 5 HP to cover small, mid-size, and large dry pipe zones.
What is the most common mistake when buying a sprinkler compressor? Using a standard shop compressor instead of a purpose-built fire sprinkler unit. Standard compressors do not include the UL/FM-listed controls, automatic pressure regulation, and NFPA 13 compliance features required for fire protection systems. Using non-listed equipment can result in failed inspections and code violations.
What is the difference between tank mount and base mount? Tank mount includes a 30 gallon integrated receiver and is the most common configuration for new installations. Base mount ships without a tank and connects to existing system piping or a separately provided receiver. Choose base mount for retrofit installations, space-constrained mechanical rooms, or systems that already have an air receiver in place.
Do sprinkler compressors run continuously? No. Sprinkler compressors use automatic start-stop controls. The compressor starts when system air pressure drops below the low-pressure setpoint and stops when the required supervisory pressure is restored. Under normal conditions with a well-sealed system, the compressor runs infrequently and for short periods.
Can I use a sprinkler compressor for pneumatic tools? Sprinkler compressors are designed exclusively for fire protection air maintenance and should not be used to power pneumatic tools. Their controls, pressure settings, and duty ratings are configured for sprinkler system supervisory pressure maintenance, not tool-use air supply.
Does CompressorPros offer free shipping on sprinkler system compressors? Yes. Standard shipping is free, direct from the manufacturer, on every unit in this category.
Shop Sprinkler System Air Compressors at CompressorPros
CompressorPros carries Jenny UL/FM-listed fire sprinkler system air compressors from 1/2 to 5 HP in tank mount and base mount configurations on 115V, 230V, and three phase power. For other application-specific compressors, browse the full Shop by Application page. For continuous duty and commercial compressors, see the related categories. Standard shipping is free, direct from the manufacturer.
If you need help sizing a sprinkler system compressor for your dry pipe or pre-action system, call (803) 339-0445 or email info@compressorpros.com.