Fix a Cracked Flush Tank of a Toilet

Overview:

This repair guide will walk you through the process of fixing a cracked flush tank of a toilet. The repair entails either fixing the crack with epoxy or replacing the tank entirely. The estimated time required to complete the repair is 1-3 hours, depending on the method chosen. The skill level needed is intermediate, as it involves handling porcelain and potentially dealing with water supply lines. Prerequisites include a clean workspace, shutting off the water supply to the toilet, and prior knowledge of basic plumbing. The expected outcome is a fully functional toilet with a secure flush tank. General safety precautions include wearing protective gloves and ensuring the area is well-ventilated.

Tools Required:

• Adjustable wrench or basin wrench

• Channel-type pliers (for old supply lines)

• Needle-nose pliers

• Teflon tape

• Epoxy for porcelain repair (e.g., epoxy putty or a two-part epoxy)

• Porcelain repair kit (optional)

• Safety gloves

• Bucket and towels (for water cleanup)

Step-by-Step Repair Guide:

• Shut Off Water Supply: Locate the shut-off valve behind the toilet and turn it clockwise to shut off the water supply. Flush the toilet to drain the tank.

• Disconnect Supply Line: Use an adjustable wrench to loosen the nut holding the supply line to the fill valve. Once loose, use channel-type pliers to remove the line.

• Drain Tank: If there's still water in the tank, use a bucket to scoop it out or sponge it dry.

• Remove Tank: Unscrew the nuts holding the tank to the bowl using an adjustable wrench. Carefully lift the tank off.

• Assess Crack: Examine the crack to determine if it can be repaired with epoxy or if the tank needs replacement.

• Prepare for Epoxy Repair: Clean the area around the crack thoroughly with a cloth and acetone. Allow it to dry completely.

• Apply Epoxy: If using epoxy putty, cut off a piece and knead it until it’s pliable. Apply it over the crack, smoothing it out. For a two-part epoxy, mix according to the instructions and apply.

• Allow Epoxy to Cure: Follow the epoxy’s instructions for curing time, usually several hours or overnight.

• Reinstall Tank (if removed): Place the tank back on the bowl, ensuring it's aligned. Tighten the nuts by hand, then with the wrench a bit more. Be careful not to overtighten.

• Reconnect Supply Line: Attach the supply line to the fill valve and tighten securely with the adjustable wrench.

• Turn On Water Supply: Turn the shut-off valve counterclockwise to turn on the water supply. Check for leaks.

Estimated Cost:

• Epoxy for porcelain repair: $10-$30

• Porcelain repair kit: $20-$50

• Replacement tank (if needed): $50-$150

• Tools (if not commonly owned): $20-$100

• Approximate labor cost if hiring a professional: $100-$300

Tips and Warnings:

• Safety First: Wear gloves to protect your hands from sharp edges and chemicals.

• Epoxy Choice: Choose an epoxy specifically designed for porcelain to ensure durability.

• Temporary Fix: If you’re not ready to replace the tank immediately, epoxy can serve as a temporary fix, but monitor for leaks.

• Leak Test: After completing the repair, flush the toilet several times to test for leaks around the repaired area and connections.

• Professional Help: If you're not comfortable with the repair or if the crack is extensive, consider hiring a professional plumber.