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Old 09-06-2011, 05:16 PM
GreenI.A.'s Avatar
GreenI.A. GreenI.A. is offline
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Join Date: Jul 2010
Location: North East
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as little as you are going to be using it, get a tow behind from a rental company and bang them all out in day. some guys will try to use a regular air compressor because they figure it gets enough psi, but you need more cfm (cubic feet per minute) than these can give. A towbehind unit will blow out a typical residential unit atleast 3 times faster than a regular compressor and do a much more thorough job at it.

If I was you I would just sub it all to an irrigation contractor, you can make some money on the mark-up and be sure it is done right. Last thing you need is to have to replace a bunch of backflow preventors next spring. Most states require a plumber to replace backflows and pull a permit to do so, and thats not cheap
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