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Finding a reliable replacement holding tank for your RV shouldn't be a gamble with your investment. The Alpha 27 Gallon RV Holding Tank (138BLANK) delivers the same OEM-quality construction used by major RV manufacturers, ensuring a perfect fit and leak-free performance for years of worry-free travel.
Features & Specifications
- 27 Gallon Capacity - Optimal size for mid-sized RVs and travel trailers
- Dimensions: 46" x 22" x 8.5" - Designed to fit standard RV compartments
- Rotational Molded Construction - Seamless one-piece design eliminates weak points and potential leak areas
- Blank Tank Design - Allows custom fitting placement for maximum installation flexibility
- 100% Leak Tested - Every tank is individually submerged and pressure tested before shipping
- UV-Resistant Material - High-density polyethylene withstands temperature extremes and road vibration
- Part Number: 138BLANK - Direct OEM replacement for Alpha Systems installations
Why Choose the Alpha 27 Gallon Holding Tank?
When you're replacing a critical component like your RV holding tank, you need confidence that it will perform flawlessly. This Alpha 27 gallon holding tank is manufactured using the same rotational molding process and quality standards as original equipment, ensuring superior durability compared to aftermarket alternatives. The blank tank configuration gives you complete control over drain and fitting placement, making it compatible with virtually any RV waste system layout. Unlike cheaper alternatives that may crack or leak after a few seasons, this OEM-grade holding tank is built to withstand the constant movement, temperature fluctuations, and stress of full-time RV living.
Compare 27 Gallon RV Holding Tanks
Not sure which 27 gallon holding tank is right for your RV? Compare the Alpha 138BLANK with other popular models to find the perfect fit for your waste management system.
| Model | Dimensions | Capacity | Drain Location | Best For | View Details |
|---|---|---|---|---|---|
| Alpha 138BLANK | 46" x 22" x 8.5" | 27 Gallons | Blank (Custom) | Maximum installation flexibility | Current Product |
| Alpha VR224685HBLANK | 46" x 22" x 8.5" | 27 Gallons | Blank (Custom) | Alternative Alpha blank tank | View → |
| MAKS 120023001 | 46" x 22" x 8.5" | 27 Gallons | Side Right Hand | Pre-configured right drain | View → |
| Elkhart Plastics H1261003 | 33.5" x 19" x 12.75" | 27 Gallons | Blank (Custom) | Compact vertical design | View → |
| ICON HT186-ED | 64" x 20" x 9" | 27 Gallons | End Drain | Long narrow spaces with sensors | View → |
Pro Tip: Measure your RV's holding tank compartment carefully before ordering. While capacity is important, the physical dimensions must fit your available space. Blank tanks offer the most flexibility for custom installations.
Technical Specifications
- Capacity: 27 Gallons (102 Liters)
- Length: 46 inches
- Width: 22 inches
- Height: 8.5 inches
- Material: High-Density Polyethylene (HDPE)
- Construction Method: Rotational Molding
- Wall Thickness: Uniform throughout for maximum strength
- Weight: Lightweight for easy installation
- Temperature Range: -40°F to 140°F
- Manufacturer: Alpha Systems
- Part Number: 138BLANK
- Drain Configuration: Blank - allows custom fitting placement
- Compatibility: Universal fit for RVs requiring 27 gallon holding capacity
What's Included
- 1x Alpha 27 Gallon Holding Tank (138BLANK)
- Manufacturer Quality Guarantee
- 100% Leak-Tested Certification
- Installation-Ready Design
Note: Fittings, drain valves, and mounting hardware sold separately. This blank tank allows you to customize fitting placement for your specific installation needs.
Compatible Models & Alternatives
Looking for related products or different configurations? Explore our complete selection of RV holding tanks including fresh water tanks, grey water tanks, and black water tanks in various capacities. Need a different size? Check out our 30 gallon holding tanks or alternative 27 gallon models.
Frequently Asked Questions
How do I install the Alpha 27 gallon holding tank in my RV?
Installation requires removing your old tank, positioning the new Alpha holding tank in the compartment, securing it with appropriate mounting straps or brackets, and connecting your drain fittings. Since this is a blank tank, you'll need to drill and install fittings in your desired locations. We recommend professional installation if you're not experienced with RV plumbing systems.
Is this holding tank compatible with my RV model?
This 27 gallon holding tank fits any RV with a compartment measuring at least 46" x 22" x 8.5". The blank design allows custom fitting placement, making it compatible with most RV waste systems. Measure your existing tank and compartment space before ordering to ensure proper fitment.
What's the difference between a blank tank and a pre-configured tank?
A blank tank like the Alpha 138BLANK has no pre-drilled holes for fittings, giving you complete control over drain valve placement, vent locations, and sensor positioning. Pre-configured tanks have fittings already installed in specific locations. Blank tanks offer maximum flexibility but require you to install your own fittings.
How long will this RV holding tank last?
With proper care and maintenance, this OEM-grade Alpha holding tank should last 15-20+ years. The rotational molded construction and UV-resistant HDPE material are designed to withstand the harsh conditions of RV travel including temperature extremes, road vibration, and chemical exposure from waste treatment products.
What's the weight capacity of the Alpha 27 gallon holding tank?
At full capacity, this tank holds 27 gallons of waste, which weighs approximately 225 pounds (water weighs about 8.34 lbs per gallon). The tank itself is designed to safely contain this weight plus additional stress from road travel. Always ensure your RV's mounting system can support the full weight.
Can I use this tank for fresh water instead of waste water?
While this tank is manufactured from food-grade HDPE material, it is specifically designed and marketed as a holding tank for waste water (black or grey water). For fresh water storage, we recommend purchasing a tank specifically designated for potable water to ensure NSF certification and proper sanitary standards.
Why Buy from Elkhart RV Parts?
As an authorized dealer of Alpha Systems products, we guarantee 100% authentic OEM-grade parts backed by manufacturer warranties. Every holding tank is individually leak-tested before shipping, and our expert team is available to answer technical questions about fitment and installation. We understand the importance of reliable RV components and stand behind every product we sell with fast shipping, secure packaging, and a commitment to your satisfaction.
Ready to upgrade your RV's waste management system? Order your Alpha 27 gallon holding tank today and enjoy peace of mind with OEM-quality construction. Questions about fitment or installation? Our AI Live Chat is here to help!
| Material | Rotational molded plastic |
|---|---|
| Width (inches) | 22 |
| Height (inches) | 8.5 |
| Length (inches) | 46 |
| Capacity (gallons) | 27 |
- What is the capacity of the alpha holding tank? The Alpha holding tank has a capacity of 27 gallons.
- What are the dimensions of this holding tank? The holding tank measures 46 inches in length, 22 inches in width, and 8.5 inches in height.
- Is this holding tank compatible with major rv manufacturers? Yes, this holding tank is made from authentic OEM parts and is the same high-quality tank used in new RV builds by major manufacturers.
- How durable is the alpha 27 gallon holding tank? The tank is made using extra durable rotational molded construction, creating a seamless one-piece tank that offers superior strength and longevity.
- Does the holding tank undergo any quality testing? Yes, every tank is individually submerged and tested for leaks before shipping to ensure reliable and problem-free installation.
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.