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Remove the Old Fill Valve

Beginner2 hours

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Fix Leaky Toilets: A Step-by-Step Guide to Replacing Your Fill Valve · Step 3 of 6

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In this video

Place a bucket or towels under the tank to catch any remaining water. Unscrew the water supply line coupling nut from the bottom of the fill valve shank. Next, unscrew the large plastic locknut that secures the fill valve to the tank. Once the nut is removed, you can lift the entire old fill valve assembly straight out of the tank.

Goal: Remove the old fill valve assembly

  • An adjustable wrench or channel-lock pliers may be needed if the nuts are too tight to remove by hand.

Used in this video

  • Adjustable Wrench (Tool Type: Hand Tools, Wrench Type: Adjustable wrench) · optionalLoosening the water supply line and locknut if they are too tight to turn by hand.
  • Bucket (Tool Type: Plumbing Tools, Bucket Capacity: 2 gallons)Catching residual water from the tank and supply line.
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FAQs

My new fill valve is leaking where it connects to the water supply line. What should I check?

First, ensure the connection is hand-tightened, then gently snug it with your adjustable wrench, being careful not to overtighten and strip the threads. Also, check that the rubber washer inside the coupling is properly seated and not pinched or missing; a new washer may be needed if it's damaged.

Is replacing a toilet fill valve truly a beginner-friendly project, and how much time should I set aside?

Yes, this project is very beginner-friendly and perfect for a first-time DIYer. Most people can complete the entire process, including preparation and testing, within 1 to 2 hours. Taking your time and carefully following each step will help ensure a successful repair.

What crucial safety precautions should I take before starting this toilet repair?

Always begin by turning off the water supply to the toilet, usually via a small shut-off valve at the wall or floor. After turning it off, flush the toilet to empty the tank as much as possible to minimize water spills when you disconnect lines and remove the old valve.

Besides an adjustable wrench, are there any other tools I might need for this project?

An adjustable wrench, like the Husky 12 in. Adjustable Wrench, is the primary tool you'll need. You might also find a bucket helpful to catch any residual water from the tank or supply line, and a sponge or old towel for easy cleanup of small spills.

Transcript
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After that we need to go ahead and loosen them up that's holding the water supply. Next we need to loosen the foundation nut that's holding the fill valve into the tank. Now the entire old fill valve can be removed from the tank.

Auto-generated transcript. May contain errors.