Why Is My Toilet Whistling?

It’s normal for a toilet to make noises after you flush. But sometimes, a toilet may make some very unusual noises, like whistling after you flush or at random times. If your toilet is making any abnormal sounds, you’ll probably need to call a plumber. A whistling toilet isn’t just irritating. It could also be wasting water and increasing your water bill, depending on the specific cause of the noise. 

Water Supply Valve 

One of the simplest causes of a whistling toilet is an obstructed water supply. Before you call a plumber, check the water supply valve in the back of the toilet. Try turning it counter-clockwise. If you’re able to turn it, then the whistling was caused by a valve that wasn’t fully opened. It’s handy to know where the water supply valve is, just in case your toilet is in danger of overflowing from a clog after you flush it. When this happens, shut off the water valve right away to prevent an overflow. Just remember to open up the valve fully once the clog has been cleared away. 

Fill Valve 

Plumbers often discover that a faulty fill valve is to blame for a whistling toilet. Old toilets that use a metal ballcock valve are particularly susceptible to this problem. The fill valve is responsible for regulating the amount of water that fills up the toilet tank after you flush. The ball is located on the end of a metal “arm.” When you flush, the ball drops and the aperture opens. The aperture then slowly closes as the water level rises. If the whistling noise is caused by deterioration of the fill valve, then a simple adjustment may be all that’s needed to fix it. However, you should ask the plumber to replace it entirely, since the fill valve may completely fail soon. 

For professional toilet repairs, Sacramento residents can turn to the trusted team at Ace Plumbing. Our emergency plumbing services can fix everything that your plunger can’t. Call (916) 455-4548, and be sure to check out our website to view our other services, including hot water heater repairs, drain cleaning, and hydro-jetting. 

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