RV Tank Rinsers and Clean-Out Tools
What RV Tank Rinsers and Clean-Out Tools Actually Do
Holding tanks don't empty themselves all the way. Solids settle, toilet paper clumps on the bottom, and gray tank gunk builds a film on the walls. RV tank rinsers and clean-out tools are the gear that moves fresh water into a tank with enough force to break that stuff loose so it drains out the dump valve instead of sitting there all winter. A rinser is the business end (a wand or a nozzle that sprays). The clean-out hose is what feeds it, and it's a hose you keep strictly separate from anything you drink out of.
There's a second tool in the same family that owners often forget about: a water heater tank rinser. Same idea, different tank. Sediment settles in the bottom of the water heater, insulates the heating surface, and holds moisture against metal.
Before storage, this matters more than during the season. A tank that drains dirty leaves organic material sitting in the dark for months, and that's where the smell and the stuck sensor readings come from in the spring. Do it after storage too, before the first trip, because anything you missed in the fall has had all winter to cure.
Signs Your Rinser or Clean-Out Hose Is Worn
A clean-out hose fails in ways you can see. Look for stiffening and cracking in the PVC, especially near the fittings where it gets flexed the most. Check the threaded ends for rounded or chewed-up threads that won't bite on a spigot. Weeping at the collar when the water is on is an early warning, not a quirk to live with.
Rinsers show their age differently. If the spray comes out as a lazy dribble instead of a hard stream, something is partly blocked or the internals have worn. On a rinser with a built-in shutoff valve, a thumb valve that won't fully stop the flow or won't stay open means the valve is done. Cracks in the plastic body, even hairline ones, will split under pressure.
If a clean-out hose has a pinhole, split, or crack anywhere along its length, replace it now and don't rinse another tank with it.
Tank water under pressure spraying out the side of a hose puts contaminated water on your hands, your clothes, and whatever else is nearby.
There's no patch or tape fix that's acceptable on a hose carrying black tank waste.
How Often To Check These Tools
Give the clean-out hose a once-over every time you use it. That's just looking at it while you uncoil it. Twice a year, do a real inspection: hook it to a spigot, run it at full pressure, and walk the whole length looking for weeping, bulges, and cracks. Most owners pair that with the fall storage flush and the spring recommissioning.
The water heater rinser gets checked when you pull it out. Since you're typically using it once or twice a year, inspect the tip for blockage and test the thumb valve under water pressure before you put it in the drain opening. Store both items dry and out of direct sun. UV and freeze cycles are what kill PVC in Utah, and a hose left coiled in the bed of a truck all summer ages years in one season.
What We Carry at the Parts Counter
The Camco RhinoFLEX 25' Clean Out Gray/Black Water Hose (5/8" ID) is the dedicated hose for this work. It's made of durable PVC with ends that fit standard garden hose threads, and it's bright orange on purpose so it never gets confused with a drinking water hose sitting next to it in the same bay. Camco lists it for flushing black water, gray water, or tote tanks. If you clean out a tote, this is the hose for it.
For the water heater, we stock the Camco RV Water Heater Tank Rinser. It connects to any garden hose and sends a concentrated stream of fresh water into the tank through the drain valve opening, and the angled tip pushes the loosened sediment back out that same opening. It's 13 inches long with a thumb-operated on/off valve built in, so you're not running back to the spigot. The body is high-impact plastic that won't rust or corrode.
One note on the water heater: the rinsing part is a normal owner job, but if your unit runs on propane or has electrical connections you'd need to touch, have our service department handle it. Same for anything involving the gas valve or wiring. We're not being cautious for the sake of it; propane and 120-volt work belongs with a tech.
If you're not sure what threads or fittings your setup needs, bring your rig or your old hose to the counter in Millcreek or Spanish Fork and we'll match it up in person. That's faster than guessing from a photo.
Frequently asked questions
Can I just use my garden hose to flush the black tank?
No. Once a hose has carried black or gray tank water, it's contaminated, and you don't want that hose anywhere near drinking water or a vegetable garden. Keep a separate, clearly marked clean-out hose for tank work only.
How do I know when the black tank is actually clean?
Run the rinse until the water coming out of the dump hose runs clear, then give it a little longer. If a tank sensor still reads full after a clear rinse, the sensor probe likely has buildup on it, which is a different repair.
Do I need to flush my water heater before winter storage?
Most owners do it as part of the fall shutdown, since you're already draining the tank for freeze protection. Flushing out the sediment while it's open takes a few extra minutes and keeps that material from sitting against the tank all winter.
What if the rinser won't fit my water heater drain opening?
Bring your coach to our parts counter and we'll check the fit against your drain valve opening rather than guessing. We won't tell you it fits until we've looked at your unit.
Parts in this post:
Order now: call our parts counter at 801-262-2922, or stop in at either store, Millcreek in Salt Lake City or Spanish Fork. Browse all our RV parts and accessories.
