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Tag-Teaming Your Air Compressors
Question
Forum Responses
From contributor S: We have two individual units that are wired in. A third unit is tied into air lines but only used as a volume storage tank. We alternate every other day between the two units. If we have serious usage we can turn both on at the same time. The third is nothing more than a holding tank but is available for use should one of the other two die. No special valves or setups are necessary to gang them. From contributor L: If you need the volume, I would wire the relay for #2 to the pressure switch on #1 and have them both run/stop at the same time. You'll build pressure twice as fast, so they'll run half as long. From contributor K: We also have two compressors set up, one at each end of the shop. The air lines run from each compressor up to the center of the shop and we installed a simple gate valve that we leave closed. The few times we have had a problem with one compressor, we open the valve and can get by for a while running the whole shop on one unit while we do maintenance or repairs on the other. Both units are set to come on at 90 lbs and shut down at 150 lbs. By having the valve between the two, there is no drain off from one unit to the other. From contributor H: Contributor L, I would not run #2 compressor off #1's pressure switch. For safety have each pump triggered by a pressure switch on its own tank. If they do not come on at exactly the same time, you save on peak demand rates from the power company. Would you like to add information to this article? Interested in writing or submitting an article? Have a question about this article? Have you reviewed the related Knowledge Base areas below? 
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