How To Install a Bidet Attachment (with video tutorial)

TL;DR: Installing a bidet sounds like plumbing. In reality, it’s closer to assembling a chair from IKEA—except with fewer parts and a much better payoff.

Installing a bidet sounds like plumbing. In reality, it’s closer to assembling a chair from IKEA—except with fewer parts and a much better payoff.

Whether you’re installing a single-temperature model or a dual-temperature model with warm water, the process is straightforward, beginner-friendly, and fully covered in our short installation video. This guide exists to give you a clear mental map before you start—so you know what’s coming, what matters most, and where people tend to overthink things.

Before You Start: What You’ll Need

Everything essential for installation comes in the box. The only extras you’ll want nearby are a towel, a wrench, and a screwdriver. That’s it.

One thing that matters more than anything else: plumber’s tape. It’s not optional. It’s what seals threaded connections so water stays where it belongs—inside the pipes, not on your floor. Wrap it clockwise around all male threads a few times before tightening any connection. Do that consistently and leaks are extremely unlikely.

Step One: Shut Off the Water (and Take the Pressure Off)

The first move is simply turning off the water supply behind your toilet and flushing to empty the tank. If you’re installing a dual-temperature model, you’ll also shut off the hot water valve under your sink and let that line drain.

Nothing dramatic happens here. No water sprays. No surprise geysers. This step just ensures you’re working with dry lines and zero pressure.

Step Two: Remove the Toilet Seat

Most toilet seats are secured with two screws. Some are quick-release, some aren’t. Either way, this is a five-minute step.

Once the seat is off, you’ll place the provided rubber washers over the mounting holes. These matter—they help keep everything level and secure once the bidet is installed.

Step Three: Connect the Cool Water Line

This is the core connection for every Hapbidets model.

You’ll disconnect the existing water line from the toilet tank, install the included large T-valve, then reconnect everything using the provided braided hose. Tighten by hand first, then snug it up gently with a wrench. No need to muscle it.

On single-temperature models, this is the only water connection you’ll make.

Step Four (Warm Water Models Only): Connect the Hot Water Line

If you’re installing a dual-temperature model, this is where the sink comes into play.

You’ll add the small T-valve under your sink, attach the hot water hose, and run that line to the bidet. The video walks this through slowly and clearly—especially how the nut and hose feed through the connection points.

This step sounds more complex than it is. You’re not modifying plumbing. You’re simply adding a split, just like you did at the toilet.

Step Five: Attach the Bidet and Reinstall the Seat

With the water lines connected, the bidet slides neatly into place over the washers. The toilet seat goes back on top, and everything tightens down using the original screws.

If the bidet looks slightly crooked at first, don’t worry. You can adjust its position before fully tightening the seat.

Step Six: Double-Check Everything

Before turning the water back on, pause. Look at each connection. Make sure every hose is snug and every threaded joint used plumber’s tape.

This is the moment that prevents leaks—not luck, not force.

Step Seven: Turn the Water Back On

Slowly reopen the shutoff valve behind the toilet. If you installed a warm water model, do the same under the sink. Watch the connections for a few seconds. If everything stays dry, you’re done.

At this point, you’ve officially installed your bidet.

Watch the Video (Seriously)

The installation video on this page mirrors everything above—step by step, in real time. If you’re the kind of person who likes seeing it done once before doing it yourself, press play before you touch anything.

And if at any point you want reassurance, clarity, or a second set of eyes, reach out. We’re happy to help before, during, or after install.

One install. One upgrade.
After that, it’s just clean, simple, and normal.