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Turn On Water and Adjust Level — Test and Adjust the New Fill Valve

Beginner2 hours

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Fix Leaky Toilets: A Step-by-Step Guide to Replacing Your Fill Valve · Step 5 of 6

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In this video

Slowly turn the water supply valve back on. As the tank fills, check for any leaks at the locknut and the supply line connection underneath the tank. Let the tank fill completely and observe the water level. It should be about one inch below the top of the overflow pipe, as marked inside the tank. Use the adjustment screw on the fill valve to raise or lower the float until the correct level is achieved.

Goal: Test for leaks and set the correct water level

Used in this video

  • Tape Measure (Tool Type: Measuring Tools) · optionalTo accurately measure the distance from the water level to the top of the overflow pipe.
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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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Let's turn on the water slowly. It's working. It's here. It's working. Turn off the water. Is water supposed to be coming out from over here? Hmm. Okay. I don't see any leaks down below. I think it's working. I don't know. Set one at level one is below over full top. So I guess this is the overflow top. So about one is... Oh. Okay. So what I'm going to have to do is I'm going to have to unscrew this knob here. Okay. Oh. How do you do ends? Okay. Try this. That's about one that's right there. Maybe turn left. Where's Ryan? Oh. All right. One inch. It's good. Perfect. I think... And the one. Okay.

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