How-To Build Your Own “Franken-Bidet”

Ewan Grantham
Jun 16 · 7 min read

This guide is designed to step you through the process of creating your own personal, portable, rechargeable bidet. Maybe you don’t want to spend several hundred dollars on a bidet seat. Maybe you live somewhere that you aren’t allowed to mess with the plumbing. Maybe you already have a bidet seat, but can’t get The Powers That Be at work to add bidets. For these and other reasons, you might want a portable bidet.

Unfortunately there are currently no portable bidets on the market I can recommend. So I went through the options out there, and designed one that I use daily, and now you can too!

The Parts

Picture of the parts you’ll need for your “Franken-Bidet”

First off, in the back is the water flosser that we will be adapting. Link to the specific model on Amazon is here. This generally runs around $30 for the base unit, charger, and two tips. You’ll want both just in case you need to do this more than once.

Next, at bottom right, is a bidet tip replacement kit designed for a particular bidet seat. Here’s a link on BidetKing where you can order it from. This single unit that has nozzles is $9.95 currently (I’ve seen it run as much as $19.95).

Lastly, at the bottom left, is some Marine (Waterproof) Heat Shrink Tubing. I haven’t found anywhere online where you can buy just one or two of these, so here’s a link to a kit on Amazon that has two of these in the kit. You are wanting the 3 inch long, 1/2 inch diameter piece. Kit price is around $17.

The Tools

You’ll also need a tape measure — not shown

Next are the four tools you’ll need. Not shown in this picture is the tape measure. Odds are you already have one, but if you don’t, this $5 version from Amazon should do the trick. If you go with something else, do look for one that lets you pull out a couple inches and then lock it since that makes measuring the small parts easier.

Top right is a heat gun. These are useful for a lot of craft projects, but here we’re using to shrink the heat shrink tubing. This particular model does not appear to still be available, but a similar model from Wagner can be found here. Price is around $25.

Top left is a Dremel rotary tool. Again, a great item to have for crafts and hobbies. It’s shown with the cutting wheel installed, but you will also be using a drill bit with it in this effort as well. Link to the base unit at Amazon here. $75 for this “Rotary Tool” version which comes with the simple accessory kit that has the cutter and drill bit. Other versions that cost more are also available with more accessories, but those aren’t needed for this project.

Lastly is a pair of scissors (mainly to trim the parts after they’re cut and to cut the tubing). Any decently sharp pair will do, but this particular model can be found at Amazon for about $12.

The Procedure

Step 1 — Cut bidet one of the bidet nozzles (you’ll have to pull it out a bit from the attachement) at 1 1/2 inches back from very tip. Use the cutting tool on the Dremel for this (go with a Rev like 30 to keep it quick).

Step 2 — Using the Dremel, now cut the flosser tip at 1 inch from the tip.

The two parts should look like this:

Just to give you a better idea of how they should look after cutting

Step 3 — Use the scissors to trim any excess plastic from around the cut areas, and then use the Drill bit on the Dremel to slightly widen the hole at the bottom of the Bidet nozzle. Idea is that the top of the flosser tip should now fit into the bottom loosely. If it can actually go into the Bidet nozzle you’ve opened it a bit too much. Just be careful when you use the Shrink Tubing and you should be ok.

Step 4 — Now use the scissors on the 3 inches of 1/2 inch double sided adhesive heat shrink tubing and cut off half an inch — so cut it to 2 1/2 inches long.

Step 5 — Slide the Heat Shrink tubing over both pieces so that it looks like this:

Note that the tubing leaves the top 3 holes open on the bidet tip

Step 6 — Now use the heat gun to shrink the shrink tubing, and while the flosser end is still hot bend it toward you — try to make sure you bend it just below where the shrink tubing is. Above that point can cause leaks (rarely). Below that point can alter the angle of the little “bell” at the bottom — which is OK as long as it doesn’t prevent the tip from being fully inserted into the flosser. I tend to do this part of the process on the stove because it can get a little hot, and the covers for the burners are the perfect height to let the hot items rest. Things should look like this:

Angle might be a bit hard to see here, but you get the idea.

Let cool for five minutes.

Step 7 — While you’re letting this cool, remove the tank from the back of the Water Flosser, and gently pull off the tube from the intake at the top of the flosser. You will notice there is a small filter at the bottom. Cut the tubing at approximately 1/2 inch from where the filter ends inside the tubing. So something like this:

Taking a picture of something transparent on a white background, but you get the idea

Now reattach the bit with the filter on it back to the intake. You should be able to slide it all the way on, with a bit of a gap where the tank will seal between the tube and the intake. I hold on to the leftover tube so if I cut one too short I can try again. The filter is also just plugged in so it’s not that hard to remove and push into a different section of tubing.

Step 8 — Now put the tank back on, and take the cooled tip and push the base into the Water Flosser hole for the tip. Doing so should push out the little button to let you know you have a good fit. Make sure that the holes on the Bidet tip are pointing TOWARD the handle. The reason is that when you use this, you are going to be holding the flosser almost level to the floor, with the bidet tip facing where you need to clean. So the water intake needs to be at the low point to let you use most of the water. As with a regular bidet, you will need to move the flosser (and thereby the tip) around a bit to clean the whole area.

End result should look like this:

Note how the holes are pointing back toward the handle

Using and caring for your “Franken-Bidet”

Start by pressing the “Mode” button until “Normal” is the indicated level. This is the best pressure (in my opinion) for getting you clean.

As mentioned briefly above, you will hold this in one hand while hiking your bum up a bit, and then press the “On/Off” button that is just above the “Mode” button. Adjust the angle as needed to hit all the places that need to be cleaned. You may think you’re done after just a few seconds, but I highly recommend continuing to clean until you hear the flosser pushing air rather than water. One quick wipe should be enough to dry you and get anything you might have missed. Then use a bit of tissue to wipe the water off the tip. If you did things right there should ONLY be water on the tip :-)

Refill the tank at the sink using the little flip hole, again trying to hold this level or with the tip pointed slightly down to allow for the maximum amount of water to be poured. Then close the flip hole. I don’t recommend pulling the tank off to refill as it’s almost impossible to put back on without spilling a good bit, and you will be wearing down the seal.

For myself, I have a gallon-sized Ziplock bag (the ones with the actual zipper piece not just the press together seal) that I carry this around with me at work. On a full charge you should be able to use this at least three times with no diminished pressure. Make sure the charging base is somewhere you can leave this safely overnight, and you should be ready for anything.

As always, leave a comment and let me know how it works out for you, or with any questions. And ENJOY!

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