Why a Calgary Plumber Advises Against Pouring Grease Down the Sink

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As a full-fledged homeowner, you’re likely familiar with this occurrence: if you’ve ever left a puddle of fat, grease, or oil anywhere for an hour or so, it solidifies into something akin to wax from a candle. The same chemical change applies anywhere—heaps of kitchen grease going down the drain will also solidify once they’ve cooled. Furthermore, the congealed mass of grease can cling stubbornly to your home’s piping, whether or not you pour hot or cold water on them.


If you’ve ever heard your local Calgary plumber warn against pouring kitchen grease down the sink, please heed the advice. Such a deed does nothing good to a home’s plumbing, and is easily one of the most common sources of service calls to drain cleaning firms like Son-Rise Plumbing (while also being a preventable one). Well, what is so bad about it in the first place?

Grease is the building block all drain clogs are made of. Once it goes down the drain, it immediately comes into contact with the cool pipes and hardens into a sticky substance. These deposits are sticky enough to trap nearly every bit of debris that gets flushed, which causes them to get bigger and bigger over time. Before you even think about using hot water to clear out the grease deposits, be warned: the pipes will eventually cool down after being scalded, offering grease a much stickier surface to adhere to.

Hot grease is much worse. Even if the strainer in the bottom of your kitchen sink is made of metal, remember that the contraption directly below it is likely PVC pipe, which is plastic. Most of the time, the PVC is not even thick enough to handle boiling water, so it definitely cannot handle hot grease either. While hot water boils, hot grease burns as hot as 400° F – and PVC melts at 140° F. Once you pour hot grease down the drain, it can literally melt your pipes away.

If you’ve been pouring grease down your sink for some time now, there are ways to know if it’s already clogged. The most basic signs include slow water drainage, a gurgling sound, and a foul odor from your drains. For a much deeper inspection (and appropriate fix, should there be a problem), you can ask a Calgary drain cleaning professional to help you out.

It’s never too late to change your ways. The best way you can dispose of kitchen grease and used oil is to not involve the drain at all. Fats should be tossed directly to the trash bin, and oils and grease should be cooled in a container to be thrown away.

(Source: Why Not To Pour Hot Grease Down The Sink, SFGate.com)

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