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Reconnect Water Supply and Check for Leaks — Reconnect the Water Supply and Test

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How to Replace a Leaky Toilet Fill Valve: A Step-by-Step DIY Guide · Step 5 of 6

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Reconnect the water supply line to the bottom of the fill valve shank, hand-tightening the coupling nut. Slowly turn the water supply valve back on and allow the tank to fill. As it fills, check for any leaks at the supply line connection and around the tank bolts and flush valve at the bottom of the tank.

Goal: Restore water and test connections

  • Using a Fluidmaster Click Seal connector can help prevent over-tightening the supply line.
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FAQs

How long does this project typically take, and is it truly suitable for a beginner?

Replacing a toilet fill valve usually takes 30-60 minutes for most DIYers. It's considered a beginner-level project because it primarily involves basic wrench use, simple removal and installation steps, and clear manufacturer instructions for the new valve.

What should I do if the new fill valve still leaks after installation?

If you notice a leak, first check all connections, ensuring they are hand-tight, then give them an additional quarter turn with the adjustable wrench. Make sure the rubber washer is correctly seated in the fill valve's tailpiece and at the supply line connection. Avoid over-tightening plastic components, which can cause cracking.

Do I need any special tools besides an adjustable wrench, or can I use a different type of wrench?

An adjustable wrench is highly recommended for its versatility, allowing you to loosen and tighten various sized nuts. While some large pliers might work, they can slip and potentially strip plastic nuts. A small bucket or towel is also essential to catch any residual water when disconnecting the supply line.

What are the most important safety precautions to take during this toilet repair project?

Always start by completely turning off the water supply valve behind the toilet to prevent flooding. Flush the toilet to empty as much water from the tank as possible, and then use a sponge to remove any remaining water. This ensures a dry and safe workspace.

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Reconnect the water supply line. For ease of installation use Fluidmaster's new click seal toilet connector which will provide a perfect seal and protect you from over tightening. Slowly turn the water supply on and check for any external leaks at the supply line or tank bottom.

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