2. The Toilet Trap Is Blocked
Your trap is a curved segment of the porcelain fixture that is built into the lower bowl unit of your toilet. It is designed to hold standing water and keep sewer gases from entering your home. Toilet paper, paper towels and a variety of non-flushable items can clog the trap and cause a backed-up toilet. More than one toilet has become clogged when a pocket comb became lodged in the internal trap. A few minutes with a plunger should loosen any blockage and remove the clog. More stubborn clogs can be cleared with a toilet auger. Limiting toilet paper use and keeping non-flushable items out of your toilet should keep the toilet trap clear.
3.The Plumbing Vent Is Blocked
Modern toilets, as well as other plumbing fixtures, use roof vents to funnel fresh air into the plumbing system and prevent air-pressure vacuums that can hinder drain flow. Over time, these vents can become clogged with leaves, sticks, and animal nests. A blocked toilet vent will reduce the drain flow and can cause regular clogs. It’s best to hire a pro to clear your vents, since blockage can be hard to spot and will require special tools to remove.
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