What Is the Best RV Sewer Hose Length? (Recommended Length)

There are a lot of things in life you don’t really like to think about. Bathroom waste is one of them. When you have a plumbing setup at home, each time you flush your toilet, the waste goes through that plumbing. In an RV, though, you have to use a gray or black tank, a sewer hookup, and a hose, and none of it is very pretty.

What is the best RV sewer hose length for dirty jobs like these? Experts recommend getting a hose that’s between 15 and 20 feet long. Many sewer hoses come in that length already. If your hose won’t stretch from the rig’s rear to your sewage dump outlet, it’s too short.

In this article, we’re going to discuss all things RV sewer hose, from what you do with these, accessories and extensions, popular brands, and more.

What Is an RV Sewer Hose and What Do You Use It For?

Okay, let’s begin by answering a simple but important question: what is an RV hose?

This is a tool you use to drain the contents of your grey and black tanks, aka where all the waste goes. That’s essentially all you use it for, but boy, does it have a very important job.

As you can imagine, you really don’t want any waste going anywhere but through the hose tube and out as far away from you as possible. Accidents do happen, though, and leaks can be sprung if you do something incorrectly.

Most RV sewer hoses hook on the gray or black tanks via a bayonet-style connector. These connectors are often made of hard plastic with variously curved and protruding edges. The worst part is that the bayonet-style connector is notoriously hard to put on and take off. It’s going to take some elbow grease to do so.

Other factors that will determine what kind of RV sewer hose you get is:

  • The outlet size of your gray or black tank. If your RV was manufactured in the last several decades, you shouldn’t have to worry about this, as the outlets come standardized. The older your vehicle is, though, the more you should be conscientious about the gray or black tank outlet.
  • The price of the sewer hose, which is $40 to $50 on the low end and up to $150 for more expensive hoses.
  • Storage solutions available, which may include the rig basement or bumper storage with 4×4 openings.
  • The hose thickness, which is slimmer or heavier depending on your needs. You will see hose thickness demarked as mils, which are not even a single inch. Don’t be misled and buy a hose with a big mil number thinking it’ll be sufficient. It may not be.

Popular RV Sewer Hose Brands

The following brands are each well-known for their exemplary RV sewer hoses:

  • Valterra
  • Lippert (many RV owners love the Waste Master, even though it’s a little on the expensive side)
  • Camco
  • RhinoFLEX

Do You Need an Extension Hose?

Generally, if you buy a sewer hose that’s at least 10 feet long, then you shouldn’t need to worry about getting an extension hose. If you’d rather your hose stretch to 20 feet or more, though, then an extension hose will get you to that length. These add 10 inches to your current RV sewer hose.

Accessories That Come in Handy

While these accessories aren’t exactly mandatory when filtering waste from grey or black tanks through the sewer hose, they certainly do make it easier and somewhat more bearable.

  • Macerators are used to break down waste to the point where you can use even a thinner sewer hose to filter it out. This is ideal if you can’t find a dump station near you. The SHURFLO 12-volt macerator pump has four-and-a-half stars on Amazon and comes with a sealed manual turn key, O-ring sealed end bells, a seamless shell e-coated mirror, and run-dry capability.
  • A flushing hose, which is just what the name suggests. You use this to clean out the sewer hose after each use. After all, it’s not like you can get in your sewer hose and scrub it clean, nor would you want to. Valterra’s flushing hose is the one many RV owners rely on. It too has a rating of four-and-a-half stars on Amazon and is available for under $20. The hose is 25 feet long and comes in gray.
  • Clearview adapters, which are available at both 45 and 90-degree angles. Both attach to the sewer hose and waste drain tube. Since these adapters are translucent, you can monitor waste quality…you know, if you want to. The adapters from Valterra have nearly five stars on Amazon apiece.
  • Hose supports, which can be erected at between four and eight inches so waste flow never becomes an issue. This hose support from Camco costs less than $50. It has almost five stars on Amazon. You can get a hose support that’s 10 feet, 15 feet, 20 feet, and 30 feet long.
  • Latex gloves, which, while last, are certainly not least. You do not want to accidentally get any messes on your hands, so never drain the gray or black tank without gloves.
  • A garden hose, which can be used instead of a flushing hose or paired with a macerator in a pinch. You probably already have one of these at home.


If you’ve ever wondered where all that waste goes in your RV when you make it, it moves to the gray or black tank in your vehicle. From there, it will sit and start to smell. That’s why you need to regularly filter it out with a sewer hose.

Many brands make sewer hoses with an average length of 10 to 15 feet. If that’s somehow not enough for you, you can always get an extension hose to expand the length to 20 feet, 25 feet, or even longer. Don’t forget accessories like macerators, a flushing hose, and hose supports to make your work easier and faster.


Leave a Comment