Skip to main content
Stesso
Project

Adjust Tank Water Level — Test and Adjust the New Fill Valve

Beginner2 hours

Part of project

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

Helpful?

In this video

Turn the water supply back on and let the tank fill. The water level should stop about 1/2 inch to 1 inch below the top of the overflow pipe. To adjust the water level, turn the grey adjustment screw on top of the float. Turning it clockwise will raise the water level, and counter-clockwise will lower it. Flush the toilet after adjusting to check the new level.

Goal: Set the correct water level inside the tank

Used in this video

  • Tape Measure · optional — Verifying the water level is 1/2 inch below the overflow pipe.
710.3K views2.6K2-4 minutes
replumb

719K subscribers

View Channel

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
Hide

type of tool we're gonna turn the water on we're gonna let the water rise and see how high it goes to the top of the flush valve pipe now in this case there's a little knob for both the bowl water in the toilet tank water we want to make sure that the water height is about 1/2 inch from the top of this pipe so you can make a mark on that and you can turn the little lever to adjust the height so in this case if you're turning it clockwise you're gonna raise the height in the toilet tank you just want to flush it one more time and let the water rise back up to ensure that it's about 1/2 inch below the top of that

Auto-generated transcript. May contain errors.