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Install New Tank Components — Replace Gasket and Bolts

Beginner3 hours

Part of project

How to Fix a Leaking Toilet Tank-to-Bowl Gasket · Step 5 of 7

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In this video

Unpack the new toilet repair kit. Insert the new flush valve with its gasket into the large hole in the tank and secure it with the large nut on the outside. Insert the new fill valve into the smaller hole and secure it with its nut. Install the new flush handle and connect its chain to the flapper on the flush valve. Finally, press the new large rubber tank-to-bowl gasket onto the bottom of the flush valve on the outside of the tank. Tighten all nuts until snug, but do not overtighten.

Goal: Install the new fill valve, flush valve, handle, and gasket

  • Ensure gaskets are properly seated to prevent leaks. Overtightening plastic nuts can crack the porcelain tank.

Used in this video

  • Channel Lock Pliers (Tool Type: Plumbing Tools, Pliers Type: Slip-joint pliers)Tightening the large plastic nuts for the new flush and fill valves.
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FAQs

What tools and materials are absolutely essential for this project, and are there any common household items I can use?

You'll definitely need an adjustable wrench to disconnect the water supply and tighten bolts, a bucket for draining, and a screwdriver. You likely already have a bucket and towels handy. Don't forget safety gloves and a new tank-to-bowl gasket system, which ideally includes new bolts and washers to ensure a secure, leak-free repair.

How difficult is this repair for a beginner, and what's the realistic time commitment?

This is a beginner-friendly project, mainly involving unbolting and re-bolting components. While the estimated time is 3 hours, it could take longer if bolts are seized or you encounter unexpected issues, like a stubborn tank. Taking your time, especially during reassembly and testing, is key to preventing further leaks.

Are all toilet tank-to-bowl gaskets the same, or do I need a specific type for my toilet?

Not all gaskets are universal, so it's important to get the correct type. While many are designed for common brands or have a universal fit, it's best to check your toilet's make and model if you're unsure. A universal gasket system that includes new bolts, like the Fluidmaster option, often provides good compatibility and a complete replacement.

What are the most common mistakes people make when replacing this gasket, and how can I avoid them?

A common mistake is overtightening the tank bolts, which can crack the porcelain bowl or tank. Tighten them evenly and snugly until the tank is stable, then test for leaks; avoid brute force. Also, ensure the gasket is seated perfectly flat and not twisted between the tank and bowl to create a proper watertight seal.

Install New Tank Components — How to Fix a Leaking Toilet Tank-to-Bowl Gasket (Step 5, Video 2) | Stesso