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Originally Posted by Setec Astronomy Neo, that's really a local/state thing. LightningSVT (also in MI) couldn't get a drain in his garage, even with Accumlator's advice. David, it sounds like you are doing pro work, will this be in your home garage? If so, you should be cognizant of local ordinances which may prohibit you from running a business like that from your residence... |
Yeah, the local statutes are gonna decide what you can do. Some places simply prohibit them in residential zoning. But having a good builder (who has good relations with the inspectors and, most importantly is willing to work to get you what you want) and/or an attorney (if you really want to push it) should help. It's not all that different from a sanitary sewer line once the oil separator is in there but the local inspectors might need convincing. We had no problems when we did ours, just did it to commercial specs the way an oil-change place/dealership would do it. Note that even where it's prohibited as a rule, you could very well get a variance for it once the powers that be understand how the separator works- there's no *logical* reason to prohibit it. Worth the hassle IMO.
Many areas permit a "brown water" drain (sorta like what you have for your rain gutters) in residential garages, and this is a *lot* better for the environment than that would be.
Design-wise, I like a trench style drain with removable grates and a clean-out box right before the oil separator. The longer the drain is the better, and I put it in the middle of the shop. Note that it'll catch the wheels of a creeper so don't put it where you'll be rolling over it all the time. Smaller round drains (I have two of those too, in areas where something might leak/overflow) are a lot harder to clean out and more prone to clogging from the sort of stuff that gets rinsed out of undercarriages.