RÉSERVOIRS D’AIR

Most train horns average one to two seconds of honk time per gallon of air, so tank size decides how long you can stay on the horn. A 2 or 3 gallon tank covers normal honking, and bigger horns use more air, so they need bigger tanks. Train horns also need 50+ PSI to honk correctly, which is exactly what the tank is there to store. If you're running a complete HornBlasters kit, the tank is already matched to the horn.

Yes. "Air tank," "air compressor tank," and "air reservoir" all describe the same part: a pressure vessel that stores the compressed air your compressor builds. The compressor makes the air, the tank holds it at pressure, and the pressure switch tells the compressor when to top it back up. Every tank in this collection works as the storage side of an onboard air system.

More gallons means more suspension adjustments between compressor cycles, so size the tank to how often you adjust. A daily driver that airs out at shows needs less than a truck that plays on the switches constantly. Match the tank to a compressor that can keep up with it: a big tank on a small compressor just means longer waits. We carry 1 to 20 gallon tanks, so both ends of that range are covered.

These tanks are built to mount to a vehicle permanently and plumb into an onboard air system, not to carry around. There are no handles or wheels, and they shine brightest bolted to a frame rail feeding your horns, bags, or tires. If you want air with you everywhere the vehicle goes, that's exactly what onboard air does, without ever stopping to refill a tank at the shop.

A properly sealed system holds its pressure. If your tank reads lower after sitting, cold air is usually the reason: air contracts as temperature drops, so pressure dips without a single leak in the system. A steady downward creep in the same conditions means a fitting or connection needs attention, not that the tank is worn out. Moisture does collect inside any air tank, so drain it through the drain port now and then.

Every device in an onboard air system wants its own connection. The compressor feeds the tank through one port, the pressure switch and gauge each take one, your air line to the horns or bags takes another, and the bottom port handles draining moisture. Our tanks run from 4 to 8 ports depending on the model, and unused ports just get plugged, so extra ports are future room, not extra work.

Steel, with a black powder coat finish that adds corrosion resistance, on nearly every tank in the lineup. If you want the tank to be part of the look, there's also a stainless steel 5 gallon option. Steel handles the pressure cycling of an onboard air system and takes mounting hardware without complaint.

Yes, within reason. A bigger air tank stores more compressed air, so your horn holds a longer, more sustained honk before the compressor has to catch up. The tradeoff is refill time: a 12 or 20 gallon tank takes longer to recharge than a 5 gallon tank on the same compressor. Most car and truck setups run well on a 3 to 5 gallon tank, go bigger if you want longer blasts back to back or you are running air horns alongside air suspension or tools off the same tank.