How to Install a Dual Flush Toilet

December 14, 2015

Dual flush toilets are smart appliances. Rather than a one-flush-fits-all type of approach, these toilets have separate flushes for solid and liquid waste. This makes dual flush toilets very appealing to those who are looking to conserve water going into the future, but many people wonder about installation. Can a homeowner perform the install themselves, or should they call a local plumber in Cleveland to handle the plumbing installation instead? The actual installation process is almost identical to that of a regular toilet, but if you’ve never installed one of those either you should look at the process before making a choice.

Choose a Toilet

Picking out a new dual flush toilet may not seem like part of the installation, but it has important ramifications. Before shopping for a toilet, you should take measurements of the area where the toilet will go. Measure the distance between the wall behind your toilet and the bolts to make sure the new toilet will fit in the space, then check the size and shape of the base of your old toilet, and make sure the new toilet you pick out will completely cover that area. Otherwise you will have unappealing marks around the base of your new toilet.

Remove the Old Toilet

As with most plumbing installs, the very first step is to shut off the water. Then, you must remove all the water by flushing the toilet repeatedly or using a vacuum. Disconnect the toilet’s water supply hose, disconnect the tank from the bowl, remove the bolts attaching the toilet to the floor, and finally haul it out. Toilets are pretty heavy so you may need help getting the old toilet out of the house; using a dolly or wheelbarrow, when possible, makes the task much easier.

Install the New

Most new toilets will come with instructions from the manufacturer for the installation, so be sure to follow these exactly. However, there are a few steps most new dual flush toilets have in common. First, you install the gasket of the new toilet. Install the offset collar/adapter next. Put the toilet into place and attach the bolts to secure it. Then attach the tank to the bowl, connect the supply hose, and apply a silicon seal around the base of the toilet to prevent any leaks. Finally, you can reconnect the water line, pop on the toilet seat, and your new toilet is ready to use.

DIY vs. Professional Install

If you’ve installed a regular toilet before, installing a new dual flush toilet shouldn’t be any harder. If you’ve never done a toilet install before, and the above steps don’t seem like something you’d like to do, you can always have a Roto-Rooter plumber do the installation for you.


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