Imagine you're flushing away hundreds of gallons of water each month with an old, inefficient toilet. It’s not only wasteful but also costly. Swapping out your outdated commode for a water-saving dual flush toilet can cut your water usage by up to 50%. You don’t need a plumber for this — in two hours and for less than $150, you can do it yourself. Here's how.

Gather Your Tools and Materials: Spend Only $20 on Tools

Before you start, ensure you have everything you need. Running to the hardware store mid-project is frustrating and time-consuming.

Tools Needed:

  • Adjustable wrench ($12)
  • 4-in-1 screwdriver ($8)
  • Level
  • Wax ring
  • Bucket
  • Sponge

Materials Needed:

  • Dual flush toilet kit (around $120)
  • Water supply line (optional, $10)
  • Teflon tape ($2)

These tools and materials are easily available at any home improvement store. If you don't already own some of them, consider borrowing to save costs.

Remove the Old Toilet: 30 Minutes

Start by turning off the water supply valve located behind your toilet. Flush the toilet to drain most of the water from the tank and bowl. Use a sponge and bucket to remove any remaining water.

  1. Disconnect the water supply line from the bottom of the tank using the adjustable wrench.
  2. Unscrew the nuts from the bolts at the base of the toilet.
  3. Lift the old toilet straight up and set it aside. This step might require a bit of muscle, so enlist a helper if needed.

Common Mistake: Forgetting to remove excess water before lifting the toilet can result in a messy spill. Always double-check that the tank and bowl are completely empty.

removing old toilet

Install the Wax Ring: 15 Minutes

The wax ring is crucial for a leak-proof seal between the toilet and the drain.

  1. Scrape off any old wax from the flange on the floor.
  2. Place the new wax ring onto the flange, ensuring it's centered.

Safety Tip: Wax rings are sticky and can be difficult to handle. Wear gloves to keep your hands clean.

Set the New Toilet: 25 Minutes

Now it’s time to position your new dual flush toilet.

  1. Lift the toilet and carefully lower it onto the wax ring. Align the holes on the base with the flange bolts.
  2. Gently press down on the toilet bowl to compress the wax ring and ensure a secure fit.
  3. Use your level to check that the toilet is even. Adjust if necessary, then secure it by tightening the nuts onto the bolts. Be cautious not to over-tighten, as this can crack the porcelain.

Common Mistake: Skipping the leveling step can result in a rocking toilet, which may lead to leaks. Always double-check your work here.

Attach the Tank: 20 Minutes

With the bowl secured, it’s time to install the tank.

  1. Place the tank on the bowl, aligning the bolts with the corresponding holes.
  2. Hand-tighten the nuts onto the bolts, then use your 4-in-1 screwdriver to secure them further.
  3. Check for levelness and adjust as needed.

installing toilet tank

Connect the Water Supply: 10 Minutes

Reattach your water supply line. If your old line is worn or doesn't fit, replace it with a new one.

  1. Wrap Teflon tape around the threads of the shut-off valve.
  2. Connect the supply line to the valve and the tank's fill valve using your adjustable wrench.

Turn on the water supply and let the tank fill. Check for leaks around the base, supply line, and tank.

Common Mistake: Overlooking small leaks can lead to bigger problems later. Close inspection now can save you hassle.

Test the Dual Flush System: 10 Minutes

Test both flush options to ensure they're working properly. The smaller button or lever is for liquid waste, using less water. The larger is for solid waste, using more.

  1. Flush the toilet several times and check for leaks.
  2. Make sure that both flushes are functioning correctly and that the water refills the tank without issues.

When to Call a Professional

If you notice persistent leaks, if the toilet shifts when tested for level, or if you're uncomfortable with any step, don’t hesitate to call a professional. Sometimes, the flange or plumbing beneath the toilet may require more extensive repairs.

finished dual flush toilet

Get Started Now

Head to your local home improvement store with your checklist. Gather your tools and materials, then set aside a couple of hours this weekend. By the time you're done, you'll have a sleek, efficient dual flush toilet saving you money and water. Plus, you’ll have the satisfaction of knowing you did it yourself.