Alpha

Alpha 35 Gallon RV Fresh Water Tank - 28x20x18-7/8 - 198BLANK FDA Approved

Alpha 198BLANK — print-based front view
Alpha 198BLANK — print-based rear view
Alpha 198BLANK — print-based side view
Alpha 198BLANK — print-based underside view of stepped blank body
Alpha 35 Gallon RV Fresh Water Tank - 28x20x18-7/8 - 198BLANK FDA Approved
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Alpha 198BLANK — print-based front view Alpha 198BLANK — rotatable print-based stepped blank tankAlpha 198BLANK — print-based rear viewAlpha 198BLANK — print-based side viewAlpha 198BLANK — print-based underside view of stepped blank bodyAlpha 35 Gallon RV Fresh Water Tank - 28x20x18-7/8 - 198BLANK FDA Approved

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SKU: 198BLANK
Added to catalog: March 18, 2025
Last product update: July 13, 2026 at 9:19 PM
$401.33 $596.85
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About this item

  • Dimensions: 28" x 20" x 18.875"
  • Capacity: 35 gallons
35 gal · 28 x 20 x 19 · 198BLANK
Tank Type
Fresh Water $401.33 Selected
Capacity
8 gal $139.45 10 gal $136.01 12.5 gal $173.24 18 gal $364.95 20 gal $263.82 21 gal $182.69 22 gal $263.18 22.5 gal $221.46 25 gal $292.80 26 gal $319.52 29 gal $375.57 30 gal $319.97 35 gal $401.33 Selected 36 gal $382.83 37 gal $404.17 39 gal $383.21
Dimensions
20 x 10 x 10 $139.45 17 1/4 x 12 1/4 x 12 1/4 $140.61 17 x 14 x 9.5 $136.01 22 1/2 x 11 1/2 x 11 3/4 $173.24 45 x 30 x 6 1/2 $364.95 22 1/2 x 17 x 13 $263.82 29 3/4 x 10 x 16 $267.76 24 x 17 1/2 x 12 1/4 $190.26 39 x 16 x 8 $182.69 26.5 x 18 x 11 $263.18 24 3/4 x 20 x 10 1/2 $221.46 56 x 15 1/2 x 8 1/2 $292.80 44 x 17 x 9 $319.52 53 3/4 x 27 1/2 x 6 1/4 $375.57 34 1/2 x 17 1/2 x 12 $319.97 28 x 20 x 19 $401.33 Selected 53 1/2 x 27 3/4 x 7 5/8 $382.83 54 x 28 x 7 1/2 $404.17 59 3/4 x 27 3/4 x 8 1/2 $456.31 57 x 34 x 6 1/2 $383.21
Part Number
181BLANK $139.45 VR121712WBLANK $140.61 384BLANK $136.01 179BLANK $173.24 VR304565WBLANK $364.95 VR172213WBLANK $263.82 178BLANK $267.76 739BLANK $190.26 386BLANK $182.69 VR182611WBLANK $263.18 428BLANK $221.46 259BLANK $292.80 VR17449WBLANK $319.52 210BLANK $375.57 387BLANK $319.97 198BLANK $401.33 Selected VB28546W $382.83 938BLANK $404.17 VR28606WBLANK $456.31 VR34575WBLANK $383.21

Frequently needed together

Alpha 35 Gallon RV Fresh Water Tank - 28x20x18-7/8 - 198BLANK FDA Approved Elkhart RV Parts - Universal Fresh Water Tank Fittings Kit with Water Level Sensors for RV Tanks Adcoseal - B-100 Butyl Rubber Sealant - 10.3 oz Cartridge - Black - Exterior RV Tank Sealant

Total price $475.23

Upgrade Your Adventure with the Alpha 35-Gallon Fresh Water Tank for Unmatched Durability and Reliability
Dimensioned print for Alpha 35 Gallon RV Fresh Water Tank - 28x20x18-7/8 - 198BLANK FDA Approved
Keep your water supply safe and fresh on the road with the Alpha 35 Gallon Fresh Water Tank. Made from durable, FDA-approved polyethylene, this seamless, one-piece tank resists stains, corrosion, and rust for long-lasting reliability in RVs, horse trailers, or marine vessels. Its compact design fits easily while meeting OEM-quality standards for peace of mind wherever your travels take you.
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✓ ElkhartRVParts.com - The Only Authorized Place for Alpha Parts

✓ 100% Verified Authentic OEM Grade Part

Alpha 35 Gallon RV Fresh Water Tank - 198BLANK

Upgrade or replace your RV's fresh water storage with the Alpha 35-gallon fresh water tank (198BLANK). Measuring 28" x 20" x 18 7/8", this premium rotational-molded tank delivers superior quality, durability, and safety compared to many factory-installed tanks. Perfect for motorhomes, travel trailers, fifth wheels, and horse trailers.

Why Choose This Alpha Fresh Water Tank?

  • 100% FDA-Approved Materials: Made from premium food-grade polyethylene that's fully certified for safe drinking water storage - safer than many OEM tanks
  • Seamless One-Piece Construction: Rotational molding creates a leak-proof tank with no seams, joints, or weak points that could fail over time
  • Superior Durability: Built tougher than standard factory tanks with enhanced resistance to cracks, impacts, and UV damage
  • Stain and Corrosion Resistant: Maintains water purity and freshness even after years of use - won't rust, corrode, or develop odors
  • Perfect Fit Replacement: Designed to OEM specifications for easy installation in your RV's existing water system
  • Long-Lasting Performance: Outlasts and outperforms typical factory-installed tanks for worry-free adventures

Technical Specifications

  • Part Number: 198BLANK
  • Brand: Alpha
  • Capacity: 35 gallons
  • Dimensions: 28" L x 20" W x 18 7/8" overall H
  • Material: FDA-approved polyethylene (food-grade)
  • Construction: Seamless rotational molding
  • Weight: 64 lbs
  • Color: Natural/translucent
  • Certification: FDA-approved for potable water

Common Applications & Compatibility

This 35-gallon fresh water tank is ideal for:

  • Class A, B, and C motorhomes
  • Travel trailers and fifth wheels
  • Horse trailers with living quarters
  • Marine vessels and boats
  • Off-grid cabins and tiny homes
  • Emergency water storage systems

Installation & Use

Installing your new Alpha fresh water tank is straightforward for experienced RVers or professional installers. This is the blank tank; fittings are not shown as included on the retained 198BLANK drawing. Match the required plumbing and mounting layout to your installation. Ensure proper mounting and secure all connections to prevent movement during travel. The seamless construction eliminates common leak points found in welded or multi-piece tanks.

Maintenance Tips

To keep your fresh water tank in optimal condition, sanitize it at least twice per year using RV-approved cleaning solutions. Drain completely when storing your RV for extended periods. The stain-resistant polyethylene material makes cleaning easy and prevents buildup that can affect water taste and quality.

Related Products You May Need

Looking for different sizes? Check out our Alpha 40 Gallon Fresh Water Tank (388BLANK), Alpha 47 Gallon Fresh Water Tank (VR245587WBLANK), or Alpha 63 Gallon Fresh Water Tank (988BLANK). Browse our complete selection of 40 Gallon RV Fresh Water Tanks or explore all Motorhome Water Tanks.

Why Buy From ElkhartRVParts.com?

  • 100% authentic Alpha OEM-grade parts
  • FDA-approved materials for safe drinking water
  • Fast shipping with freight options for large tanks
  • Expert support via AI Live Chat for sizing and compatibility questions
  • Trusted by RV owners and professional installers nationwide

Frequently Asked Questions

Q: Is this tank safe for drinking water?
A: Yes! This tank is made from FDA-approved food-grade polyethylene specifically certified for potable water storage.

Q: Will this fit my RV?
A: Measure your existing tank space carefully. This tank measures 28" x 20" x 18 7/8". Use our AI Live Chat for help with fitment questions.

Q: How do I install this tank?
A: Professional installation is recommended. This blank tank requires an installation-specific plumbing and mounting plan; verify the original print before ordering.

Q: How long will this tank last?
A: With proper care and maintenance, Alpha tanks typically outlast factory-installed tanks by many years thanks to superior materials and construction.

Need help choosing the right tank size or have installation questions? Use our AI Live Chat for instant expert assistance with product selection and compatibility.

Order your Alpha 35-gallon fresh water tank today and enjoy reliable, safe water storage for all your RV adventures!

Original Blueprint and Gallery Views

The Alpha 198BLANK revision A drawing dated December 15, 2023 specifies approximately 35 US gallons, a 28 x 20-inch plan and an 18 7/8-inch overall height. The main body depth is 16 7/8 inches; the raised upper section adds 1 inch above the top and the lower sump projects 1 inch below the main bottom. The upper section is 8 inches wide, starts 10 inches from the end, and runs 7 7/8 inches inward. The lower sump is 4 inches wide and starts 11 inches from the end.

The four shadowed views and rotatable model reconstruct this individual blank-tank drawing, retaining its upper ramp and lower sump. Undimensioned body insets and blend transitions follow the printed proportions. Natural polyethylene finish is illustrative. The underside view is flipped for display; no fittings are invented. Dimensions are reference dimensions with ±1/4-inch tolerance and capacity is approximate. Use the original blueprint to verify clearance and exact fitment; this is not measured manufacturing CAD.

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100% Authentic OEM Parts

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.

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