It’s the aspect of owning an RV that’s probably universally everyone’s least favorite thing to deal with. Yep, you guessed it, we’re talking about the sewer hose and messing with the plumbing. Let’s just say that when most people buy an RV for camping or living, it’s not exactly what they look forward to dealing with.

While we’re not here to break down how the entire water system works, we’re here to talk about something that could end up changing the plumbing experience with your RV completely. That is, of course, using PVC piping to help assist with the whole process. But it all seems to start with one question when you talk about PVC pipe for an RV sewer hose.

What size PVC pipe for RV sewer hose? Indeed, that’s the question right there. If you’re familiar with the content that we like to dive into on here, this is another one of those questions that’s actually pretty darn simple to answer. However, as always, there’s more than meets the eye (which is a fancy way of saying that there’s more that you should know about the subject matter).

Are sewer hoses in an RV all the same size?

Knowing the size of your RV sewer hose, to begin with, is an important detail in all of this. Here’s the good news, sewer connections in RVs are generally universal.

Most, if not all, RVs will come with sewer hoses that are three inches in diameter. This is, more or less, the universal size that you’ll see for RV sewer hoses.

What size PVC pipe for an RV sewer hose?

When installing a DIY PVC sewer hose, you’re going to want to use PVC piping that’s three inches in diameter.

Now, it’s worth pointing out (and this is also going to be talked about in-depth here in a second) that it really comes down to the size of the adapter. But, generally speaking, three inches is going to be the size.

That just seems to be the standard.

So, what’s all this talk about an adapter?

Ah, yes, we kind of jumped the gun on this, didn’t we?

Here’s the deal, you won’t be able to just connect some PVC piping to your RV’s plumbing system as is. What will be needed is an RV sewer to PVC adapter.

The adapter itself allows a PVC pipe to be used as a draining system in your RV.

Thankfully, these types of adapters aren’t very expensive.

And when we say that they’re not very expensive, we’re talking about $10 to $20.

Yeah, let’s just say that price isn’t going to be an obstacle if you really want to convert your plumbing system with PVC piping.

What are some advantages to using a PVC pipe?

This is really what it all comes down to, correct?

Knowing the answer to the question, “What size PVC pipe for RV sewer hose” is really only the first step in the overall process.

What’s also beneficial to know is what some of the advantages are to using PVC pipe for the purposes of RV plumbing. Believe us, there are definitely quite a few, so let’s take a look at those, shall we?

Sewer hoses are often below-average

Those who’ve actually owned or own an RV can probably speak to this.

Let’s face it, the sewer lines that come equipped with most RVs will typically leave a lot to be desired. They get the job done, but they’re (again, typically) nothing to write home about.

However, it’s not all sewer hoses that are terrible. Take a look at: 10 Best & Most Sturdy RV Sewer Hoses (in 2022).

PVC sewer pipe is common in houses

On top of the fact that PVC itself is one of the most popular and common thermoplastic polymers in the world, it’s also used in many homes for the purposes of plumbing.

Newer homes, in fact, tend to be built with plastic sewer pipes.

The smooth surface

There’s a reason why PVC is often used for plumbing. One such reason is thanks to the smooth interior of the material. This allows for ideal wastewater disposal.

Ideal if you don’t plan on moving the RV

If you’re one of those people who just park your RV for extended periods of time and live in it, opting for PVC plumbing can be very useful. Now, on the contrary, this might not be the best choice if you’re constantly moving your RV.

It’s just plain durable

Perhaps more than anything else, PVC pipe is just plain durable and designed to withstand the elements.

It’s resistant to weathering, corrosion, and chemical rotting and this can be useful seeing how the PVC will be exposed to the elements.

A leak occurring or damage happening from the elements aren’t going to be very likely.

How do you rig it up?

There are two sources that we really like for this, and we would like to share both of those with you.

One of them is a video giving a brief illustration of how to rig this up, and the other is a step-by-step guide (which is also quick and to the point) to help you along the way.

It’s not too tricky of a process.

All that’s really needed are the right tools and some patience. Although that last one can be kind of tricky, are we right?

Final thoughts

What size PVC pipe for RV sewer hose? Three inches.

That’s the moral of the story, at the end of the day.

Gee, we could’ve saved X minutes of your life just by saying that and leaving.

We’re the worst. Nah, we hope that this beginner’s guide was insightful for you.

And if you enjoyed this read, you might also enjoy this one. In this post, we detail some of the best ways that you can store your RV sewer hose. Just in case, you know, you still need to use a traditional sewer hose to get the job done.