Projects

Installing a Plunger-Valve Ballcock

Project Overview

A ballcock is basically a toilet's only mechanical part. It has a number of moving components that can wear out or break. When that happens, you'll need to replace the ballcock. It's not a difficult job. There are several types of ballcocks – plunger-valve, diaphragm, float-cup, and floatless. They all use similar steps and methods for replacement. You can replace the ballcock with the same type you have, or one of the other options.

Adjust the Water Level in the Tank

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Step 1

Turn Off the Water

Shut off the water and flush the toilet to empty the tank. From underneath the tank, place a bucket under the retaining nut, then remove the ballcock retaining nut with an adjustable wrench and take out the old ballcock assembly.

Step 2

Attach a New Cone Washer

Attach a new cone washer to the new ballcock tailpiece and insert the tailpiece into the tank opening.

Step 3

Align the Float Arm

Align the float arm socket so that the float arm will pass behind the overflow pipe. Screw the float arm onto the ballcock. Screw the float ball onto the float arm.

Step 4

Bend or Clip the Refill Tube

Bend or clip the refill tube so that the tip is inside the overflow pipe.

Step 5

Screw on Mounting and Coupling Nuts

Screw the mounting nut and the supply-type coupling nut onto the ballcock tailpiece and tighten the nut with an adjustable wrench. Turn on the water and check for leaks. Note: over- tightening the nut can crack the toilet tank.

Step 6

Adjust the Water Level in the Tank

Adjust the water level in the tank so it is about 1/2-inch below the top of the overflow pipe, or align with the "full" line inside the tank.

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Project Details

Skill Level: Beginner

Time: 1 hour

Before you start, read this »

Due to differing conditions, tools, and individual skills, The Home Depot® assumes no responsibility for any damages, injuries suffered, or losses incurred as a result of attempting to replicate any of the home improvement ideas portrayed in this website Before beginning any home improvement project, review it thoroughly to ensure you or your contractor can finish the project and if any doubts or questions remain, consult local experts or authorities. Because codes and regulations vary greatly, you always should check with authorities to ensure that your project complies with all applicable local codes and regulations. Always read and observe all of the safety precautions provided by any tool or equipment manufacturer, and follow all accepted safety procedures.

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