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Premium 21-Gallon RV Fresh Water Tank - NSF & FDA Approved
Upgrade your RV, horse trailer, or marine vessel with this professional-grade 21-gallon fresh water holding tank (Model T165). Measuring 39" x 16" x 8", this rotational molded polyethylene tank delivers superior performance and reliability for your water storage needs.
Why Choose This Fresh Water Tank?
- 100% Safe Drinking Water Storage: NSF approved and made from FDA-approved polyethylene material - safer and more reliable than many factory-installed RV tanks
- Built to Last Decades: Seamless one-piece construction eliminates weak points and prevents leaks that plague inferior tanks
- Never Worry About Rust or Corrosion: Premium polyethylene material resists stains, corrosion, and rust - keeping your water fresh and clean year after year
- OEM-Quality Construction: Meets or exceeds factory standards with 1/8" wall thickness for exceptional durability
Technical Specifications
- Capacity: 21 gallons
- Dimensions: 39" L x 16" W x 8" H
- Material: FDA-approved polyethylene
- Wall Thickness: 1/8"
- Water Fill Inlet: One 1.25" connection
- Outlet Connections: Three 3/8" NPT fittings
- Weight: 46 lbs
- Certifications: NSF approved for potable water
- Model Number: T165
Perfect For Multiple Applications
This versatile fresh water tank is ideal for:
- RV and motorhome fresh water systems
- Horse trailer water storage
- Marine and boat applications
- Replacement for damaged or outdated tanks
- OEM installations and upgrades
Compare Similar Fresh Water Tanks
| Model | Capacity | Dimensions (L x W x H) | Part Number | Best For | View Details |
|---|---|---|---|---|---|
| Elkhart RV Parts T165 | 21 Gallons | 39" x 16" x 8" | T165 | Compact spaces, weekend trips | Current Product |
| Alpha 386BLANK | 21 Gallons | 39" x 16" x 8" | 386BLANK | Same footprint alternative | View Details |
| Elkhart Plastics W1637 | 25 Gallons | 27.75" x 17.75" x 12" | 0129W/W1637 | More capacity, taller profile | View Details |
| EPI 1562W | 40 Gallons | 39" x 16" x 16" | 1562W/W1609 | Extended trips, same footprint | View Details |
💡 Helpful Tip: If you have the same 39" x 16" footprint, consider the 40-gallon option for nearly double the capacity with just 8" more height. For tighter vertical spaces, the 21-gallon models are your best choice.
Superior Quality You Can Trust
Unlike cheaper alternatives, this rotational molded tank features seamless construction that eliminates joints and weak spots. The high-quality polyethylene material won't crack, fade, or deteriorate over time, ensuring your investment lasts for years. The stain-resistant surface stays cleaner longer, and the corrosion-proof design means you'll never deal with rusty water or tank failure.
Easy Installation & Compatibility
With standard 1.25" fill inlet and three 3/8" NPT connections, this tank integrates seamlessly with most RV, trailer, and marine plumbing systems. The compact 39" x 16" x 8" footprint fits in tight spaces while providing ample 21-gallon capacity for extended trips.
Complete Your Fresh Water System
Need fittings for your installation? Check out our 3/8" FPT Fittings that are compatible with this tank's outlet connections. Browse our complete selection of RV Fresh Water Tanks to find the perfect solution for your needs.
Frequently Asked Questions
Q: Is this tank safe for drinking water?
A: Yes! This tank is both NSF approved and made from FDA-approved polyethylene, making it completely safe for potable water storage.
Q: What's the difference between this and the Alpha 386BLANK?
A: Both are 21-gallon tanks with identical dimensions (39" x 16" x 8"). The main difference is the manufacturer - this Elkhart RV Parts model is our premium OEM-grade option with verified NSF certification.
Q: Can I upgrade to a larger capacity without changing my footprint?
A: Absolutely! If you have 16" of vertical clearance, consider our 40-gallon tank (Model 1562W) which uses the same 39" x 16" footprint but is 16" tall instead of 8".
Q: What fittings do I need for installation?
A: This tank has three 3/8" NPT outlet connections and one 1.25" fill inlet. You'll need compatible fittings based on your plumbing setup - use our AI Live Chat for personalized fitting recommendations.
Q: Will this fit my specific RV model?
A: Measure your available space carefully. This tank requires 39" length x 16" width x 8" height clearance. For help with compatibility, use our AI Live Chat for expert assistance.
Upgrade to professional-grade water storage today. For questions about compatibility, installation, or product selection, use our AI Live Chat for deep product knowledge and expert assistance.
| Material | Polyethylene |
|---|---|
| Width (inches) | 16 |
| Height (inches) | 8 |
| Length (inches) | 39 |
| Material approval | FDA approved |
| Capacity (gallons) | 21 |
| Wall thickness (inches) | 0.125 |
| Connection diameter (inches) | 0.375 |
| Water fill inlet diameter (inches) | 1.25 |
- What material is the 21 gallon rv fresh water holding tank made of? The tank is made of high-quality, durable FDA-approved polyethylene.
- What are the dimensions of this fresh water holding tank? The tank measures 39 inches in length, 16 inches in width, and 8 inches in height.
- Does this water tank have any corrosion or rust resistance? Yes, the tank is stain, corrosion, and rust resistant, ensuring durability and cleanliness over time.
- How many and what size connections does this water tank have? It has one 1.25-inch water fill inlet and three 3/8-inch NPT connections.
- Is this tank suitable for use in rvs and marine applications? Yes, it is designed for RVs, horse trailers, and marine products, making it a versatile and reliable water storage solution.
Factory-Fresh OEM Parts — the same brands installed in new RVs straight from Elkhart. Genuine, name-brand components made to order — never generic, never outdated. Sourced directly from the original RV manufacturers for perfect fit and factory-level quality.