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Alpha VR40427HBLANK RV Holding Tank - 40 Gallon Black Water Storage
The Alpha VR40427HBLANK holding tank delivers reliable 40-gallon black water storage capacity with OEM-grade rotational molded construction. This 42" x 40" x 7" holding tank features seamless one-piece design, leak-tested quality assurance, and blank configuration for custom fitting installation to match your RV's specific plumbing requirements.
Why Choose the Alpha VR40427HBLANK Holding Tank?
Alpha's VR40427HBLANK holding tank solves the challenge of replacing worn or damaged RV waste tanks with authentic OEM-quality construction. The 40-gallon capacity provides ample black water storage for extended trips, while the rotational molded seamless design eliminates weak points and potential leak areas found in welded tanks.
At 42" long, 40" wide, and 7" tall, this holding tank features a unique square-like footprint that maximizes capacity in a low-profile design. The generous 40" width combined with the shallow 7" height makes it ideal for wide, shallow compartments in travel trailers and motorhomes.
Key Features and Specifications
- Capacity: 40 gallons black water storage
- Dimensions: 42" length x 40" width x 7" height
- Configuration: Blank (no pre-installed fittings)
- Construction: Rotational molded seamless one-piece design
- Material: High-density polyethylene (HDPE)
- Part Number: VR40427HBLANK
- Manufacturer: Alpha
- Quality Testing: 100% leak-tested before shipping
- Grade: OEM quality - same tanks used in new RV builds
Perfect For These Applications
The 42" x 40" x 7" size with 40-gallon capacity makes the VR40427HBLANK ideal for:
- Travel trailer black water tank replacement
- Class C motorhome waste tank upgrades
- Fifth wheel holding tank repairs
- RVs with wide, shallow tank compartments
- Custom RV builds requiring square footprint
- RV restoration projects with specific dimensions
- Applications requiring low-profile 7" height
- Extended trip RVs needing reliable waste storage
Unique Square Footprint Design
The VR40427HBLANK features a unique 42" x 40" footprint, creating an almost square design that maximizes capacity in wide compartments. This configuration offers several advantages:
- Maximizes capacity in wide, shallow spaces
- Low 7" profile fits under floors with limited clearance
- Ideal for RVs with non-standard tank compartment shapes
- Provides 40-gallon capacity without excessive length
- Balanced weight distribution across wide footprint
Note: Professional installation recommended. You'll need to drill and install appropriate fittings, gaskets, and hardware based on your RV's plumbing system.
Compare Similar Alpha Holding Tanks
| Model | Capacity | Dimensions (L x W x H) | Part Number | Best For | View Details |
|---|---|---|---|---|---|
| VR40427HBLANK | 40 Gallons | 42" x 40" x 7" | VR40427HBLANK | Wide shallow compartments, square footprint | Current Product |
| VR28598HLBLANK | 40 Gallons | 59" x 28" x 8" | VR28598HLBLANK | Same capacity, left drain, longer length | View |
| VR334985HBLANK | 42 Gallons | 49.5" x 33" x 8.375" | VR334985HBLANK | Slightly larger capacity, balanced dimensions | View |
| 304BLANK | 43 Gallons | 61.75" x 24" x 8.5" | 304BLANK | Longer, narrower footprint | View |
Helpful Tip: When selecting a holding tank, measure your RV's tank compartment carefully. The VR40427HBLANK's unique 42" x 40" square footprint is ideal for wide, shallow compartments where traditional long, narrow tanks won't fit efficiently.
Installation and Compatibility
This holding tank ships as a blank unit requiring professional installation. You'll need to:
- Verify tank dimensions fit your compartment (42" L x 40" W x 7" H minimum)
- Drill appropriate holes for drain outlet, vent, and sensor fittings
- Install gaskets and threaded fittings with proper sealant
- Connect to existing RV plumbing system
- Secure tank with appropriate mounting straps or brackets
- Test all connections for leaks before use
Professional installation strongly recommended. Improper installation can lead to leaks, odors, and system failures.
What Makes Alpha Holding Tanks Superior?
Alpha has built a reputation for engineering excellence in the RV industry. Their holding tanks feature:
- Rotational Molded Construction: Seamless one-piece design eliminates weak points and potential leak areas
- OEM Quality Standards: Same tanks used by major RV manufacturers in new builds
- 100% Leak Testing: Every tank is individually submerged and tested before shipping
- High-Density Polyethylene: Superior chemical resistance and durability for waste applications
- Unique Footprint Options: Square design maximizes capacity in wide compartments
- Blank Configuration Options: Complete flexibility for custom plumbing installations
- Strict Quality Control: Manufactured to meet all health and safety requirements
- Built for RV Life: Designed to withstand constant movement, vibration, and temperature changes
- Long Service Life: Durable construction provides years of reliable performance
Frequently Asked Questions
What is the capacity of the VR40427HBLANK holding tank?
The Alpha VR40427HBLANK holding tank has a 40-gallon capacity for black water storage. This provides ample waste storage for extended RV trips and reduces the frequency of dump station visits.
What makes this tank's dimensions unique?
The VR40427HBLANK features an almost square footprint (42" x 40") with a shallow 7" height. This unique design maximizes capacity in wide, shallow compartments where traditional long, narrow tanks won't fit efficiently.
What are the dimensions of the VR40427HBLANK?
The VR40427HBLANK measures 42" long x 40" wide x 7" tall. Make sure to measure your RV's tank compartment carefully, allowing extra space for fittings, connections, and mounting hardware.
Is this tank leak-tested?
Yes, every Alpha VR40427HBLANK holding tank is individually submerged and leak-tested before shipping. This rigorous quality control ensures you receive a reliable, problem-free tank ready for installation.
What does blank configuration mean?
Blank configuration means the tank has no pre-installed fittings. You have complete flexibility to drill and install drain outlets, vent fittings, and sensor ports exactly where your RV's plumbing system requires them.
Will this fit my travel trailer?
The VR40427HBLANK fits RVs with tank compartments that accommodate 42" length x 40" width x 7" height, plus clearance for fittings and connections. The wide, shallow design is perfect for travel trailers with wide compartments and limited vertical space.
Do I need professional installation?
Yes, professional installation is strongly recommended. Installing a holding tank requires drilling precise holes, installing fittings with proper gaskets and sealant, connecting to plumbing systems, and thorough leak testing. Improper installation can lead to serious problems including leaks and odors.
How does this compare to other 40-gallon tanks?
The VR40427HBLANK's unique 42" x 40" footprint sets it apart from other 40-gallon tanks that typically have longer, narrower dimensions. This square design is ideal for RVs with wide, shallow compartments where traditional tanks won't fit efficiently.
Authentic Alpha Parts from Elkhart RV Parts
When you order the VR40427HBLANK from Elkhart RV Parts, you receive 100% authentic Alpha products backed by our commitment to quality. We are an authorized Alpha dealer, ensuring you receive genuine OEM-grade parts with full manufacturer quality standards.
Our team understands RV holding tank systems and can help you select the right tank size and configuration for your specific application. Have questions about sizing, installation, or compatibility? Use our AI Live Chat for expert product guidance and technical support.
Order Your Alpha VR40427HBLANK Holding Tank Today
Replace your worn or damaged RV holding tank with the reliable Alpha VR40427HBLANK holding tank. With 40-gallon capacity, unique square footprint, rotational molded construction, and 100% leak-tested quality, this holding tank delivers the OEM-grade performance you need for years of trouble-free RV adventures.
Ships via freight. Order now for fast delivery of your authentic Alpha holding tank.
| Material | Rotational Molded Plastic |
|---|---|
| Width (inches) | 40 |
| Height (inches) | 7 |
| Length (inches) | 42 |
| Weight (pounds) | 136 |
| Capacity (gallons) | 40 |
- What is the capacity of the alpha vr40427hblank holding tank? The Alpha VR40427HBLANK holding tank has a capacity of 40 gallons.
- What are the dimensions of this holding tank? The holding tank measures 42 inches in length, 40 inches in width, and 7 inches in height.
- Is this holding tank durable enough for rv use? Yes, it is made with extra durable rotational molded construction designed to withstand the movement, vibration, and temperature changes experienced during RV travel.
- Does this tank meet health and safety standards? Yes, the tank is manufactured to strict specifications ensuring it meets all necessary health and safety requirements for RV waste management.
- Is this holding tank compatible with other rv models? Yes, this tank is an authentic OEM part used in new RV builds by major manufacturers, ensuring perfect compatibility and performance.
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.

