California Air Tools has a pretty good line up of Oil Less compressors. Their 2 hp models are adequate, but I am looking into the 4 hp unit and running 220v. A large unit like this will require a lot less cycle time to recharge the pressure vessels. It is without a doubt overkill for the aeration of a pond, but I use a lot of air tools that require significant reserve capacity. If a fellas got to run a compressor I think that multi tasking may have some merit. The use of low pressure gages, and pressure relief valves along with a high quality metering valve I am hoping to accomplish my goals. Your advise has put this on hold and I am excited to see if I can make this all work for me. I have already purchased a pump that still functions per spec, and I am going to buy 2 9" diffusers anyway, so with a few gages and valves which I will need anyway I got nothing to lose and one less project. Thanks for all of the advise.
