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Alpha 608BLANK RV Holding Tank - 48 Gallon Center Drain Large Capacity Black Water Storage
The Alpha 608BLANK holding tank delivers reliable 48-gallon black water storage capacity with center drain orientation and OEM-grade rotational molded construction. This 70" x 28" x 8" holding tank features seamless one-piece design, leak-tested quality assurance, and center drain configuration for RVs with extended length basement storage and centered plumbing layouts.
Why Choose the Alpha 608BLANK Holding Tank?
Alpha's 608BLANK holding tank solves the challenge of replacing worn or damaged RV waste tanks with authentic OEM-quality construction. The 48-gallon capacity provides substantial black water storage for extended trips and full-time living, while the rotational molded seamless design eliminates weak points and potential leak areas found in welded tanks.
At 70" long, 28" wide, and 8" tall, this holding tank features an extended length profile ideal for large RVs with long basement storage configurations. The 70" length maximizes capacity while maintaining a manageable 8" height and moderate 28" width. The center drain orientation provides balanced drainage and is ideal for RVs with centered plumbing configurations.
Key Features and Specifications
- Capacity: 48 gallons black water storage
- Dimensions: 70" length x 28" width x 8" height
- Drain Orientation: Center Drain
- Configuration: Blank (no pre-installed fittings)
- Construction: Rotational molded seamless one-piece design
- Material: High-density polyethylene (HDPE)
- Part Number: 608BLANK (VR28708HBLANK)
- Manufacturer: Alpha
- Quality Testing: 100% leak-tested before shipping
- Grade: OEM quality - same tanks used in new RV builds
Perfect For These Applications
The 70" x 28" x 8" size with 48-gallon capacity and center drain makes the 608BLANK ideal for:
- Class A motorhome black water tank replacement with center plumbing
- Large fifth wheel holding tank upgrades
- Full-time RV living with extended capacity needs
- Luxury travel trailer waste tank repairs
- Custom RV builds requiring large capacity with extended length and center drain
- RV restoration projects with long basement storage and centered plumbing
- Applications requiring extended time between dump stations
- Large families or groups needing substantial waste storage
Center Drain Orientation - What It Means
The 608BLANK features center drain orientation, which means the drain outlet is positioned in the center of the tank. This configuration offers several advantages:
- Balanced drainage from both sides of the tank
- Ideal for RVs with centered plumbing layouts
- Provides optimal flow and complete drainage
- Perfect for the extended 70" x 28" footprint design
- Eliminates need for offset plumbing connections
Note: Professional installation recommended. You'll need to drill and install appropriate fittings, gaskets, and hardware based on your RV's plumbing system.
Extended Length Design
The 608BLANK features an extended 70" length profile, making it one of Alpha's longest holding tanks. This configuration offers several advantages:
- 70" length maximizes capacity in long basement compartments
- Moderate 28" width fits standard RV configurations
- Low 8" profile maintains manageable height
- Center drain works perfectly with extended length design
- Provides 48-gallon capacity in an extended footprint
- Perfect for Class A motorhomes and large fifth wheels
- Ideal for RVs with long, narrow tank compartments
Compare Similar Alpha Holding Tanks
| Model | Capacity | Dimensions (L x W x H) | Drain Side | Part Number | Best For | View Details |
|---|---|---|---|---|---|---|
| 608BLANK | 48 Gallons | 70" x 28" x 8" | Center Drain | 608BLANK | Extended length, center plumbing | Current Product |
| VR345175HBLANK | 45 Gallons | 51" x 34" x 7.875" | Check specs | VR345175HBLANK | Similar capacity, wider, shorter length | View |
| 940BLANK | 50 Gallons | 64" x 32" x 8" | Right Drain | 940BLANK | Slightly larger capacity, right drain, wider | View |
| VR246085HRBLANK | 45 Gallons | 60" x 24" x 8.5" | Right Drain | VR246085HRBLANK | Similar capacity, right drain, narrower | View |
Helpful Tip: Center drain tanks like the 608BLANK provide balanced drainage and work perfectly with extended length designs. Always verify your RV's drain location before ordering.
Installation and Compatibility
This holding tank ships as a blank unit requiring professional installation. You'll need to:
- Verify tank dimensions fit your compartment (70" L x 28" W x 8" H minimum)
- Verify center drain orientation matches your RV's plumbing layout
- Drill appropriate holes for drain outlet (center position), vent, and sensor fittings
- Install gaskets and threaded fittings with proper sealant
- Connect to existing RV plumbing system at center position
- 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
- Center Drain Configuration: Balanced drainage ideal for centered plumbing systems
- Large Capacity Options: 48-gallon capacity for extended freedom
- Extended Length Designs: 70" length maximizes capacity in long 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 608BLANK holding tank?
The Alpha 608BLANK holding tank has a 48-gallon capacity for black water storage. This is a large capacity tank, providing substantial waste storage for extended RV trips and full-time living.
What does center drain orientation mean?
Center drain means the drain outlet is positioned in the center of the tank, providing balanced drainage from both sides. This configuration is ideal for RVs with centered plumbing layouts and works perfectly with the tank's extended 70" x 28" footprint.
What are the dimensions of the 608BLANK?
The 608BLANK measures 70" long x 28" wide x 8" tall. The extended 70" length makes it ideal for long basement storage configurations. 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 608BLANK 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 (at center position), vent fittings, and sensor ports exactly where your RV's plumbing system requires them.
Will this fit my Class A motorhome?
The 608BLANK is designed for large RVs including Class A motorhomes with long basement storage and centered plumbing. Measure your tank compartment carefully - you need at least 70" length x 28" width x 8" height, plus clearance for fittings and connections. The 48-gallon capacity with center drain is ideal for full-time RVing and extended trips.
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 long can I go between dump stations with 48 gallons?
The 48-gallon capacity provides extended time between dump stations. For a family of 4, you can typically go 5-7 days or longer depending on usage patterns. This makes the 608BLANK ideal for boondocking and full-time RV living.
Is this suitable for full-time RV living?
Absolutely! The 608BLANK's 48-gallon capacity with center drain is perfect for full-time RV living. The large capacity reduces the frequency of dump station visits and provides the convenience and freedom needed for extended stays and boondocking.
Authentic Alpha Parts from Elkhart RV Parts
When you order the 608BLANK 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, drain orientation, and configuration for your specific application. Have questions about sizing, drain orientation, or compatibility? Use our AI Live Chat for expert product guidance and technical support.
Order Your Alpha 608BLANK Center Drain Large Capacity Holding Tank Today
Replace your worn or damaged RV holding tank with the reliable Alpha 608BLANK center drain large capacity holding tank. With 48-gallon capacity, center drain orientation, extended 70" length, blank configuration flexibility, 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 and full-time living.
Ships via freight. Order now for fast delivery of your authentic Alpha holding tank.
| Material | Rotational Molded Plastic |
|---|---|
| Width (inches) | 28 |
| Height (inches) | 8 |
| Length (inches) | 70 |
| Capacity (gallons) | 48 |
- What is the capacity of the alpha vr28708hblank holding tank? The Alpha VR28708HBLANK holding tank has a capacity of 48 gallons.
- What are the dimensions of this holding tank? The holding tank measures 70 inches in length, 28 inches in width, and 8 inches in height.
- Is this tank compatible with most rvs? Yes, this tank is made with authentic OEM parts and is the same high-quality tank used in new RV builds by major manufacturers, ensuring compatibility.
- Does this holding tank come with fittings included? No, this particular model VR28708HBLANK is a blank tank and does not include any fittings.
- How durable is the construction of the alpha holding tank? The tank is made with extra durable rotational molded construction, creating a seamless one-piece tank that provides superior strength and longevity compared to traditional tanks.
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