How does a garage sink or laundry room sink affect the septic tank?

Typically the garage and laundry room sinks get all the stuff that you would never put down the kitchen sink. As discussed on another FAQ, common household chemicals are ok under normal use. There are some things that should definitely be avoided:
Harsh chemicals of any kind
Insecticides
Herbicides and weed killers
Gas, diesel, kerosene, lighter fluid, coal oil, lamp oil or anything combustible
Paint or paint products
Engine oil or grease
Automotive Parts cleaning fluids
Any engine fluids including Radiator, brake, power steering or blinker fluid.
Anything considered a bio hazard.
Basically if you wouldn’t or shouldn’t put it down the kitchen sink, don’t put it in the laundry room or garage sink either.

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