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The Alpha 33.5 gallon RV holding tank is a replacement waste holding tank for RV owners, service shops, and dealers matching a 56" x 20 1/2" x 9" tank footprint. Use it when the original tank is cracked, leaking, or no longer holding waste reliably, but measure carefully before buying because tank swaps are driven by capacity, outside dimensions, and drain/fitting layout. Confirm your drain and fitting locations against the original tank before ordering.
Features & Specifications
- Brand: Alpha
- Tank type: RV Holding Tank
- Capacity: 33.5 gallons
- Dimensions: 56" x 20 1/2" x 9"
- Part number: 430BLANK
- Drain / fitting note: Verify against your original tank before ordering
- Use case: RV black/gray waste holding-tank replacement when the footprint and drain layout match the original tank.
Why Choose This Alpha Holding Tank?
This tank is for buyers who already know the approximate capacity they need and want a clean, measurable replacement option instead of guessing from a generic photo. The key advantage is the verified size: 56" x 20 1/2" x 9", with Alpha part number 430BLANK for easier cross-checking against paperwork, tank stamps, or prior service notes.
The trade-off is that RV holding tanks are not universal. Before ordering, compare the length, width, height, drain location, and any existing fittings on your tank. If one of those details does not match, choose a different Alpha tank size or ask AI Live Chat to help narrow the options.
Compare Alpha RV Holding Tanks
Not sure which holding tank is right for your RV? Compare this tank against nearby Alpha capacities and footprints before you commit.
| Model | Dimensions | Best For | View Details |
|---|---|---|---|
| Alpha 33.5 Gallon - 430BLANK | 56" x 20 1/2" x 9" | replacement layouts where this capacity and footprint match the original tank | Current Product |
| Alpha 33 Gallon - 909BLANK | 54" x 21 7/8" x 8 1/2" | replacement layouts where this capacity and footprint match the original tank | View Details |
| Alpha 33 Gallon - 201BLANK | 56" x 30" x 7.5" | replacement layouts where this capacity and footprint match the original tank | View Details |
| Alpha 34 Gallon - 197BLANK | 56" x 24" x 8" | replacement layouts where this capacity and footprint match the original tank | View Details |
Tip: Match the tank by outside dimensions first, then confirm capacity and drain/fitting locations. A close gallon rating is not enough if the footprint or outlet position is different.
Technical Specifications
| Brand | Alpha |
| Tank type | RV Holding Tank |
| Capacity | 33.5 gallons |
| Dimensions | 56" x 20 1/2" x 9" |
| Part number | 430BLANK |
| Drain / fitting note | Verify against your original tank before ordering |
What's Included
Tank only as listed; fittings, sensors, straps, adhesives, and installation hardware are not included unless they are separately shown or stated on the product page.
Compatible Models & Alternatives
Use this listing when the Alpha 430BLANK capacity and footprint match your current RV holding tank. If your measurements are slightly different, compare the nearby Alpha tank options in the table above rather than forcing a close-but-wrong replacement.
Frequently Asked Questions
How do I know if this Alpha holding tank will fit my RV?
Measure the existing tank and compare the outside dimensions, capacity, drain position, and fitting locations. Do not rely on gallon capacity alone.
Is this tank for fresh water?
No. This listing is for an RV holding/waste tank application, not a potable fresh-water tank.
What does the part number 430BLANK help me verify?
The part number gives you a cleaner way to compare against labels, old invoices, manufacturer paperwork, or prior service records.
What should I pair with a replacement holding tank?
Most installs require checking the existing valves, seals, straps, fittings, sensors, and plumbing connections. Reuse or replace those items based on condition and verified sizing.
What if my drain location does not match?
Choose a different tank. Drain and fitting locations are critical on holding-tank replacements, and modifying the wrong tank can create leaks or installation problems.
Why Buy from Elkhart RV Parts?
Elkhart RV Parts focuses on hard-to-find RV replacement parts and keeps product pages built around the measurements and part numbers buyers need to avoid ordering the wrong component.
| QAI Certification | REC 559-1 |
|---|---|
| Width (inches) | 20.5 |
| Height (inches) | 9 |
| Length (inches) | 56 |
| Capacity (gallons) | 33.5 |
| Construction material | Rotational Molded Plastic |
- What are the dimensions of the alpha 33.5 gallons holding tank? The tank measures 56 inches in length, 20.5 inches in width, and 9 inches in height.
- Is this holding tank suitable for rv waste management? Yes, the Alpha 33.5 Gallons Holding Tank is specifically designed for RV waste management and meets all necessary health and safety standards.
- What material is the alpha holding tank made from? It is made using extra durable rotational molded construction, creating a seamless, one-piece tank for superior strength and longevity.
- Does this tank come with any quality assurance? Yes, every Alpha holding tank is individually submerged and tested for leaks before shipping to ensure reliable performance.
- Is the alpha 33.5 gallons holding tank compatible with major rv brands? Yes, this tank uses authentic OEM parts and is the same high-quality tank used in new RV builds by major manufacturers, ensuring perfect compatibility.
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.