If you need a reliable 50 gallon tank for auto detailing, this guide picks five durable options designed for portable use, easy filling and draining, and clear fluid visibility. These tanks suit mobile detailers, fleet maintenance crews, and small business setups that require bulk water storage or chemical mixing on site. Each pick is evaluated for durability, fill/dispense access, and suitability for non-flammable liquids. The quick-reference table below highlights each product’s core strengths to help you compare at a glance.
| Product | Best For | Key Benefit |
|---|---|---|
| RomoTech 82123919 Horizontal Square Reservoir | On-site mobile detailing teams | True 50 gallon capacity with clear markings and UV-stabilized poly |
| Dunmiers DRT50 Long Side | Trailer or truck-mounted setups | Drain on the long side for flexible routing |
| Dunmiers DRT50 Short Side | Compact installations | Drain on the short side for tight spaces |
| Elkhart Plastics 50 Gallon Utility Tank | Versatile yard and vehicle use | Flat bottom and translucent markings for quick level checks |
| Ameri-Kart 50 Gallon RV Fresh Water Tank | RV or mobile cleaning with potable water | Built for drinking water with multiple fittings |
RomoTech 82123919 Horizontal Square Reservoir Water Tank, 50 Gallon
The RomoTech reservoir delivers a true 50 gallon capacity in a horizontal square form. The natural poly tank is UV-stabilized and translucent for quick level checks, making it suitable for potable or non-flammable liquids. It includes an oversized 5-1/2″ lid and a built-in bulkhead with a 3/4″ NPT outlet for fast refills and hose connections. This model is best for mobile detailers who need a rugged, outdoor-ready tank with clear liquid level visibility. Caution: ensure compatibility with any chemical additives before use, as the tank is designed for non-flammable liquids.
Dunmiers DRT50 50 Gallon Water Tank (Long Side Drain)
This 50 gallon tank is designed with a long-side drain option, making hose routing and drainage easier in trailer or truck setups. It features an 8″ lid with vent and a 1.25″ bulkhead drain. The translucent material allows quick visibility of liquid levels. It’s a solid choice for mobile detailing operators who require a straightforward drain layout and easy top-access filling. Best for: installations where drain placement on the long side simplifies plumbing. Limitation: bulkhead drain plug is not included, so plan to source it separately.
Dunmiers DRT50 50 Gallon Water Tank (Short Side Drain)
This variant uses a short-side drain for installations where space is limited. The 8″ lid with vent and 1.25″ bulkhead drain provide reliable access, while translucent material keeps liquid levels easy to monitor. It’s well-suited for compact detailing rigs or pickups where space efficiency is a priority. Caution: ensure available clearance for a short-side drain in your mounting area to avoid interference with equipment.
Elkhart Plastics 50 Gallon Utility Tank
This square utility tank is built for durability with UV inhibitors to withstand sunlight exposure. It features a large 6″ fill cap and 2″ NPS port plus 3/4″ NPT outlet for quick dispensing. The ribbed construction supports secure strapping, and the translucent design with molded gallon/liter markings aids level checks. Best for: use on trucks or trailers where a rugged, weather-resistant tank is needed. Limitation: liquids must not exceed a certain specific gravity, so check your fluids before use.
Ameri-Kart 50 Gallon RV Fresh Water Tank
Ameri-Kart’s 50 gallon RV fresh water tank is designed for potable use, suitable for drinking, cooking, and washing in RVs, trailers, and tiny homes. It’s made in the USA from BPA-free materials and offers multiple built-in fittings, including a 1.5″ NPT and two 0.5″ NPT ports. This model is best for mobile detailers who need potable water storage with straightforward installation. Caution: ensure that the tank’s fittings match your plumbing layout and that potable water hygiene standards are maintained during use.
Buying Guide: Key Considerations For 50-Gallon Tanks
What will you store and how will you dispense it?
Choose a tank with a compatible material for your liquids. Non-flammable liquids like water-based cleaners pair well with UV-stabilized poly tanks. Consider a built-in bulkhead and outlet size that matches your pump or hose fittings to minimize adapters and leaks.
Where will you install it?
Assess space and mounting: horizontal vs. vertical, long-side vs. short-side drains, and whether you need a flat bottom for stable mounting on trailers or truck beds. A translucent body with gallon/liter markings helps monitor levels without opening the lid.
How important is portability and access?
For mobile detailing, look for oversized lids and easy-fill caps, plus a drain design that keeps hoses away from the vehicle or workspace. UV resistance is valuable for outdoor use and long service life.
Safety and compliance considerations
Ensure the tank material is suitable for the liquids you plan to store. For potable water, prioritize BPA-free materials and NSF or IAPMO-compliant fittings. If you’re storing chemicals, verify compatibility and specific gravity limits stated by the manufacturer.
Installation and maintenance
Check for included fittings and compatible bulkheads. Plan for periodic inspection of seals, gaskets, and outlets to prevent leaks. A translucent tank with visible markings simplifies routine checks and refilling.
Best picks summary
- Best overall for durability and visibility: RomoTech 82123919.
- Best for flexible drainage layouts: Dunmiers DRT50 Long Side.
- Best for space-constrained installations: Dunmiers DRT50 Short Side.
- Best for outdoor versatility: Elkhart Plastics 50 Gallon Utility Tank.
- Best for potable water in RV/mobile setups: Ameri-Kart 50 Gallon RV Fresh Water Tank.
FAQ
- What is the practical capacity of these tanks? All listed models advertise a true 50 gallon capacity, with actual usable volume varying slightly by design.
- Are these tanks suitable for non-potable liquids? Yes, most are designed for non-flammable liquids; verify fluid compatibility with the specific model.
- Do they come with fittings? Most include basic bulkhead fittings; some models may require additional plugs or fittings. Check product details.
- Can I mount these tanks in a trailer? Yes, several models offer flat bottoms and ribbed structures for secure mounting on trailers or trucks.
- Is potable water storage always recommended? For potable use, choose BPA-free materials and confirm compliance with relevant standards (IAPMO/NSF).
- Which tank is best for heavy-duty outdoor use? The Elkhart Plastics unit is designed with UV inhibitors and a rugged ribbed structure for outdoor durability.