Kitchen sink drains
Be sure to wipe off your plates into the garbage or compost bin before washing or rinsing them. Grease and food particles will build up in the drain and block your sink. Also, never pour used cooking oil down any drain as it will cool and stick to the pipes, eventually causing a nasty blockage. Used cooking oil can be poured into a jar or container, placed in the refrigerator to cool and solidify, and then be thrown out.
To prevent clogging of your garbage disposal, put in small pieces of food waste in small batches, allowing then to be ground and cleared our. Let the water run after you are finished to help wash the material out into the larger pipes.
Bathroom sinks, bathtubs, and shower stalls
Screens should be placed in all drains. An accumulation of hair is what causes most blockages of these drains.
Blockages are almost always caused by objects that should not be flushed down a toilet, such as Q-Tips, dental floss, Kleenex, makeup wipes, and any form of pop-up wipe. A good rule to follow: toilet paper and nothing else.
Garage drain pits and roof drains
Your garage drain pits need to be cleaned out and your flat rooftops cleared off once or twice a year so that they are ready to handle heavy rains or the spring thaw. If these drains get blocked it most often results in costly flood damage.