An RV sewer hose support holds your hose at a steady downward slope so waste drains fully instead of pooling in sags. The best choice depends on how far you are from the dump port, how much your campsite varies and how compactly you need to store it. This guide compares the main support types and explains how to set one up properly.
Why Slope Matters
Gravity does the work in a sewer hose, so an unsupported hose that sags can hold liquid, trap solids and cause backups. Experienced RVers aim for a continuous downhill run, commonly about a quarter inch of drop per foot, from the RV outlet to the dump inlet. Hose supports keep it from drooping, protect against kinks and make the setup neater. They also reduce the strain on fittings and help avoid leaks at connection points.
Support Types Compared
| Type | How it works | Pros | Cons |
|---|---|---|---|
| Rigid plastic cradle (one piece) | Long ridged trough that holds hose | Simple, durable, inexpensive | Bulky to store |
| Interlocking sections | Short pieces that connect to desired length | Adjustable and stores in a smaller footprint | Joints can shift on uneven ground |
| Adjustable-height supports | Stands or legs that change height | Handle slopes and uneven sites | More parts and setup time |
| Accordion or flexible supports | Fold out along the hose | Compact and light | May sag if not fully supported |
Interlocking designs are popular because they fit in small bumper tubes or storage bays. If you want to compare, search RV sewer hose supports in different lengths and note how each is stored.
Choosing the Right Length
Measure the typical distance from your RV outlet to the dump inlet, and choose a support slightly longer than your usual setup. Common lengths range from about 10 to 20 feet, and some supports can be linked for more. Buying too short means you may need to rely on bare hose for the last stretch. Too long wastes storage space. If you often camp in sites where sewer connections are far from the rig, an extendable or modular design gives flexibility.
Also check the hose diameter compatibility. Supports are designed for the standard three-inch sewer hose, but flexible cradles may not fit other sizes. Verify the inner width and the manufacturer’s stated compatibility.
Features to Look For
- UV-resistant plastic: Prevents cracking and brittleness from sun exposure.
- Textured or ridged channel: Keeps the hose from slipping sideways.
- Ground stakes or non-slip feet: Hold the support steady on gravel or grass.
- Easy cleaning: Smooth surfaces rinse clean and do not hold residue.
- Lightweight but sturdy build: Heavy supports are harder to handle, while flimsy ones bend under load.
- Compact storage: Matters if you keep them in a bumper tube or basement compartment.
Setting It Up Right
Connect the hose to the RV outlet first, then lay out the support along the path to the dump inlet, adjusting for the ground. Make sure the high end is at the RV and the low end at the inlet. Check that the hose rests in the cradle without twisting. Use blocks or adjustable legs to fill dips. After connecting, open the gray valve first or follow the manufacturer’s dump sequence recommendation, and finish with the black tank. Rinse the hose and wear disposable gloves. A pair of disposable gloves and a hose rinse kit keeps cleanup hygienic. Always follow campground rules and local regulations regarding dumping.
Common Problems and Fixes
If the hose still pools, shorten the run, raise the RV end with leveling blocks or add support in the low spots. If the support slides, stake it or weigh it down. If it cracks, replace it, since broken edges can snag hoses. Keep fittings tight and use a clear elbow adapter to see when flow stops, but be mindful of hygiene. After use, rinse the support, dry it and store it separately from drinking water gear. Clean and store sewer equipment in a dedicated bin to prevent contamination.
Finally, avoid leaving the hose and support in place for long if you are staying many days with flat ground nearby; leaving the gray valve open is generally discouraged because it prevents the tank from building enough volume to flush the line.
Fittings and accessories complete the setup. A bayonet-style or threaded hose fitting must match your RV outlet, and a clear elbow or a sturdy adapter at the dump station helps you see what is flowing. Many campers also carry a spare gasket, a pair of caps for the hose ends and a separate hose for flushing. Keep these items in a dedicated, clearly labeled bin so they never touch drinking water equipment.
Storage and handling are the other considerations. A support that nests or breaks down into short pieces fits in a bumper compartment, whereas a long rigid support may need a roof or rear mount. Consider how often you dump, how many hookups you use and the weather. In freezing climates, make sure the support does not trap water that could freeze and crack the plastic. Whatever you choose, practice the setup once at home so you are confident when you arrive at a busy campground.
Frequently Asked Questions
Do I really need a hose support?
If your site is flat and the run is short, you can sometimes manage without one. For longer runs or uneven ground, a support helps prevent sagging.
What slope should I aim for?
A steady downward slope is the goal, often cited as around a quarter inch per foot, but any consistent downhill is better than dips.
Can I use a ladder or boards instead?
You can improvise, but purpose-made supports hold the hose securely and keep it cleaner.
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