How to install a Bidet Seat on an RV toilet – RV Bidet VIDEO

Many Bidets often receives questions about installing a bidet seat on an RV toilet. While there are different toilet and bidet options, we are showing the installation process using the Dometic 310 RV toilet and the Cascade 3000 bidet seat.

Recommendation for RV Bidet: Cascade 3000

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How to install a Bidet Seat on an RV toilet Transcript:

We get a lot of questions about installing electric Bidet Seats in RV’s. This is a tricky thing to do, because there’s only a select few toilets and Bidet Seats that will work in an RV. Today we’re going to walk you through the ins and outs of installing a Bidet Seat, on a toilet, in an RV, so that you can set one up on your own. For this video, we are going to install the Cascade 3000 Bidet Seat, on the Dometic 310 toilet. We’ve picked this pairing, because it works very well together. A lot of RV toilets may not work. We’re going to talk about what to look for in an RV toilet, to determine whether or not it will work for you. We’re going to talk about some modifications you need to make to the toilet, to make it work and everything you need to know.

My name is Daniel Johnson, I’m your bidet expert and I’m the owner of, where over the past eight years, we’ve sold over 10,000 bidets.

Let’s start by taking the seat off of our existing Dometic 310 toilet. To do that, we need to pop these little plastic covers, (a little screwdriver under there does a good job of that) and now grab a phillips and loosen this. The nut on the bottom side has a little nub on it, so you can just hold it with your hand, you don’t need a wrench down there. There’s that nub. This side is up, this side is down and you can just hold this nub on the bottom. Now, the reason that we picked the Dometic 310 is, because this back portion can be removed. One of the problems that we run into with RV toilets is their compact design. Obviously with an RV toilet you want it to be compact, because there’s limited space in an RV, but their compact design can make it hard to put a Bidet Seat on them. We’ve just removed the toilet seat and this plastic cover, which has opened up the back a little bit for the next steps of our installation.

Let’s go ahead and drain the water from the toilet next. We want to turn off the water supply, so that there’s not more water flowing to the toilet. Then we can flush the toilet, just by pushing down on the flush lever, here at the bottom. Once it’s stopped draining and we’re set to go there, we’re going to disconnect this hose. We’re going to put a rag underneath this connection, just in case some water pours out. Using a crescent wrench, we’re going to loosen up this connection and disconnect that hose. You can see we got a little bit of water there, good thing we had a rag. In order to install a bidet seat on an RV toilet, there are a few necessary pieces that wouldn’t normally come with a Bidet Seat. One of them is this particular T, which is a half inch, half inch, half inch T, one female and two male. The other is a pipe extension. You can see, we created one here, with a pipe and then a couple of fittings that will allow us to connect it to the pipe, here (which we’ll talk about in a bit). Now, if you wanted to source these pieces yourself, you’re more than welcome to. However, if you want to simplify matters, when you go to our website ( and check out the Cascade, there will be an option when purchasing there, to include the RV kit. We’ll send you all these pieces with your purchase, should you decide to go that route. Let’s go ahead and start by installing this T-connector. We’re gonna go ahead and get that snug here, give it a little twist with the wrench, but we don’t want to over tighten either. Now that we’ve done that, let’s go ahead and reconnect our water supply. Make sure that on this, you also have your rubber washer. Go ahead and connect that, again hand tight and then snug it up just a hair. Now, we’ve got our offshoot, that we’ll use to connect the water supply for the Bidet Seat, here in a moment.

00:00 Introduction
00:56 Formal Introduction
01:13 Step #1 – Remove Old Toilet Seat
02:32 Step #2 – Disconnect Toilet
05:05 Step #3 – Move Vacuum Breaker
06:42 Step #4 – Install Mounting Plate
08:25 Step #5 Install Cascade 3000
09:40 Step #6 – Connect Bidet to Water Supply
10:59 Step #7 – Check for Leaks and Test
14:05 Closing Statement