Fixing a malfunctioning fill valve is a simple DIY project that can conserve resources, stop water waste, and eliminate persistent toilet noise. The ballcock valve, also known as the flush valve assembly, controls the refill cycle after each flush. When it malfunctions, the tank may fail to refill, or it might keep running even when full. Here's how to replace it step by step.

First, 横浜市でのトイレつまり解消・水漏れ修理 turn off the water supply to the toilet. You will find a small knob on the wall behind or beside the toilet. Turn it to the right until fully closed. This will stop water from entering the tank. Next, flush the toilet to drain most of the water from the tank. Use a cloth or absorbent pad to soak up any remaining water left at the bottom. Be sure to place a wide basin nearby in case of unexpected leaks.

Next, remove the supply tube. This is the plastic supply line that runs from the plumbing wall to the tank’s base. Use a adjustable pliers to remove the threaded connector. Once loose, pull the line away gently. You may get a trickles, so have a absorbent cloth nearby.

Find the fill valve within the tank. It is the elevated mechanism with a water-level regulator, either a ball on an arm or a tube-shaped buoy. Loosen the securing bolt underneath the valve. You might need to keep the valve steady with your fingers while unscrewing to avoid damaging the tank. Once the nut is removed, lift the old valve out of the tank.

Take the old valve with you to the hardware store to confirm compatibility. Most modern toilets use a universal fill valve that fits most models. When you return, place the replacement valve into the tank’s mounting hole. Make sure the rubber gasket is properly seated and aligned. Fasten the retaining nut with your fingers, then use a adjustable tool to give it a slight additional twist. Never crank it tightly, or you risk breaking the tank.

Connect the water supply line back to the bottom of the new valve and clamp the fitting firmly. Hook up the small refill hose to the overflow standpipe. This refill hose should be secured with a clip beside the pipe and should remain above the waterline.

Gradually reopen the shutoff valve. Watch the tank replenish while scanning for seepage. If everything looks good, allow it to reach its standard water mark. Set the water level to 1 inch below the overflow rim. Most new valves have a turning knob or lever for this. Test the flush to make sure the valve shuts off properly and no continuous running occurs.

Once you confirm the toilet is working correctly, put away your supplies and discard old parts. Replacing the ballcock valve is a cost-effective repair that can prolong your toilet’s service life and help conserve water. You’ve just avoided expensive repairs and prevented a potential flood.

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Pub: 12 Apr 2026 11:01 UTC

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