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Oil/Water Separators

Oil/Water Separators

Oil/Water Separators

(OP)
I have a project with a maintenance garage floor drains discharging directly to the sanitary sewer. According to the Town sewer ordinance and plumbing code, an oil/water separator is required prior to discharging to the sewer. Did some research, called reps, etc. Found a wide variety of oil/water separators and oil/sand separators. Seems like I just need a oil/sand separator (basically a tank with baffles) for gravity discharge to sanitary sewer. Does anyone see any cons to using a simple concrete tank (one piece, say 1,000 gal), w/ booted pipe connections, risers for access during cleaning, baffles, and outlet pipe tee'd to the bottom of the tank? Seems like the most cost effective, simple solution for a maintenance garage with minimal flow.

RE: Oil/Water Separators

That is a basic design of early oil-water separators....baffles and decanting from below the probable oil surface. Vertical baffles will help with stilling, while horizontal baffles with perforations will help with top oil isolation.

RE: Oil/Water Separators

1,000 gallon seems a bit overkill for a garage floor drain

RE: Oil/Water Separators

Several manufacturers have engineered units specifically for these applications. By the time you figure out the maintenance (cleaning as needed and required by the town), installation, and other costs; getting a unit designed specifically for the purpose is generally a lot cheaper and easier. Also, they are a lot smaller than 1,000 gallons.

I have specified Zurn units in the past with good results.

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