Description
Valterra Silverback 21-Gallon Tote Tank – Gray & Black Water Waste Transport
Skip breaking camp for every dump run with the Valterra Silverback 21-Gallon Portable Waste Holding Tank. Nicknamed the "Silent Protector," this heavy-duty, blow-molded tote tank is engineered to eliminate the common nightmare scenarios of portable waste management — leaks, overfilling, and unmanageable hauling. It ships as a complete, ready-to-use waste transport system, letting you dump both gray and black water at the nearest station without moving your entire RV.
Built by Valterra — the same manufacturer trusted for OEM gate valves and sewer hoses on millions of RVs — the Silverback 21 features an integrated Valterra gate valve, an exclusive Tow-N-Pull handle that fits all standard hitch sizes, and a ClearView fill window so you always know your exact fill level without opening the cap or guessing.
Used For: Gray and black water waste transport
Specifications:
- Capacity: 21 gallons
- Wheels: 2 airless rubber tires with reinforced fiberglass wheels — never go flat, no air pressure to check
- Construction: Heavy-duty, blow-molded body with integrated Valterra gate valve
- Includes: 21-gallon tote tank, 3' sewer hose, 3" 360° rotating bayonet adapter, Silverback quick coupler, and two termination caps
- Warranty: 3-year limited warranty
Key Features:
- Integrated Valterra gate valve — built by the same manufacturer whose valves are OEM standard on millions of RVs
- Exclusive Tow-N-Pull handle — fits all standard hitch sizes for effortless transport from campsite to dump station
- ClearView fill window — see your fill level at a glance without opening the cap
- 360° jet-spray cleanout port — connects to any standard garden hose to power-rinse every corner of the tank interior
- Full-rotation directional vent — aim odors away from you in any wind condition while speeding up fill and drain times
- Airless rubber tires — roll confidently over gravel and dirt with zero risk of flats or blowouts
- Complete, ready-to-use kit — no additional parts needed to get started
Frequently Asked Questions
Can this tank hold both gray and black water?
Yes — the Silverback 21-Gallon is designed to safely transport both gray and black water waste.
Is 21 gallons the right size for my RV?
The 21-gallon size hits a good middle ground — bigger than the compact 15-gallon (ideal for Class B vans and pop-ups) but more maneuverable than Valterra's larger 28 and 36-gallon models built for full-timers and extended-stay camping.
Does this come with everything I need, or do I need to buy extra parts?
It ships as a complete kit: the 21-gallon tank, 3' sewer hose, 3" rotating bayonet adapter, Silverback quick coupler, and two termination caps — ready to use right out of the box.
Do the wheels ever go flat?
No — the Silverback uses airless rubber tires with reinforced fiberglass wheels, so there's no air pressure to maintain and no risk of flats, even on hot pavement or rough terrain.
How do I clean the tank after dumping?
The 360° jet-spray cleanout port connects to any standard garden hose, driving high-powered water jets into every corner of the tank for a thorough rinse.
How do I know when the tank is full without opening it?
The ClearView fill window lets you visually check your fill level at any time — no guessing, no unreliable float bobbers.
Can I control odors while filling or dumping?
Yes — the full-rotation directional vent lets you aim foul air away from you in any wind condition, while also speeding up both fill and empty times.
You May Also Need
- Valterra Silverback Replacement Sewer Hose
- Valterra Silverback Quick Coupler (replacement)
- Ratchet straps for secure towing/storage
