Best 50-Gallon Holding Tanks for RVs and Water Storage
The best 50-gallon holding tank depends on what it will store, the available installation space, and whether you need fittings included. The Custom Roto-Molding H85 is a straightforward 50-gallon RV holding tank; Tough Grade suits buyers prioritizing a low-profile polyethylene design; and the RecPro options offer a choice between tanks with and without fittings. For fresh or gray water, consider the Class A Customs tank, which lists fresh-water-safe materials.
| Product | Best For | Key Detail |
|---|---|---|
| Custom Roto-Molding H85 | A basic 50-gallon RV tank | 50-gallon holding capacity |
| Tough Grade 50 Gallon | Low-profile installations | 53 x 27 x 10.5 inches |
| RecPro, No Fittings | Installations needing a separate fittings plan | 48.5 gallons actual capacity |
| RecPro, With Fittings | Buyers seeking the fittings version | 48.5 gallons actual capacity |
| Class A Customs T-5000 | Fresh or gray water storage | Built-in NPT fittings |
Custom Roto-Molding H85 50-Gallon Tank
The Custom Roto-Molding H85 is a direct option for shoppers searching for a 50-gallon RV holding tank. The listed product information identifies it as a 50-gallon waste-water tank made by Custom Roto-Molding. That makes it a relevant choice when the required capacity is the main selection criterion.
- Best for: RV owners looking for a tank identified as 50 gallons.
- Why it was selected: Its stated capacity and waste-water purpose closely match the search.
- Check before buying: The supplied details do not list dimensions or fittings, so confirm the tank’s fit and connection requirements for your setup.
Tough Grade 50-Gallon Polyethylene Tank
This Tough Grade tank is a 50-gallon option for black- or gray-water storage. Its dimensions are 53 inches long, 27 inches wide, and 10.5 inches high. The product information describes rotationally molded polyethylene construction and a low-adhesion internal surface intended to resist buildup.
- Best for: RV builds or mobile units that need a broad, low-profile tank.
- Why it was selected: It combines stated 50-gallon capacity, specified dimensions, and black- or gray-water use.
- Consideration: Its 53-by-27-inch footprint may not suit compact installation spaces. Measure the intended location before choosing it.
RecPro 50-Gallon Tank, No Fittings
Despite its 50-gallon product name, RecPro lists this tank’s actual capacity as 48.5 gallons. It measures 53 by 27 by 10.5 inches and is made from polyethylene. The listing describes a connection clamp on the port and compatibility with a RecPro tank installation kit.
- Best for: Buyers who want the RecPro tank dimensions and plan to source or arrange fittings separately.
- Why it was selected: Its listed size and near-50-gallon capacity make it a close match for this search.
- Limitation: It is not a full 50 gallons by the stated actual capacity, and the product name specifies no fittings.
RecPro 50-Gallon Tank, With Fittings
This version shares the RecPro tank’s listed dimensions of 53 by 27 by 10.5 inches and its stated actual capacity of 48.5 gallons. It is the better choice between the two RecPro listings if you are specifically comparing the version identified as having fittings. The features also note a connection clamp and compatibility with the RecPro tank installation kit.
- Best for: Buyers who prefer the fittings version of this RecPro tank.
- Why it was selected: It provides a close-to-50-gallon capacity in a clearly specified size.
- Limitation: Confirm which fittings are included and whether they match your plumbing plan; the supplied details do not specify every fitting’s configuration.
Class A Customs T-5000 Fresh-Water Tank
The T-5000 is a 50-gallon tank for fresh or gray water, rather than a black-water waste tank. The manufacturer states that it uses materials approved for fresh and drinking water. It measures 38.25 by 14.25 by 22.25 inches, excluding fittings, and has two 1.5-inch female NPT fittings and two 0.5-inch female NPT fittings.
- Best for: RV or concession setups needing fresh-water or gray-water storage.
- Why it was selected: It offers 50-gallon capacity, stated fresh-water suitability, and built-in fittings.
- Limitation: Do not choose it as a black-water tank; the listed uses are fresh and gray water.
Buying Guide: How To Choose A 50-Gallon Holding Tank
What will the tank hold?
Start by separating waste-water tanks from fresh-water tanks. The H85 is listed for waste water, while Tough Grade is described for black or gray water. The Class A Customs T-5000 is for fresh or gray water. Match the tank to its intended use instead of relying on capacity alone.
Will it fit the installation space?
Compare the product’s length, width, and height with the available space, and account for plumbing access. The Tough Grade and RecPro models measure 53 by 27 by 10.5 inches. The T-5000 has a different shape and lists dimensions excluding fittings. The H85 listing provided here does not include dimensions, so verify them before purchase.
Does the stated capacity mean 50 usable gallons?
Check the actual-capacity specification, not only the product name. RecPro lists 48.5 gallons of actual capacity for its “50 Gallon” models. Other products in this comparison are identified as 50-gallon tanks, but their supplied details do not provide a separate usable-capacity figure.
Are fittings included and compatible?
Review the fittings description and compare connection types with your plumbing design. The RecPro listings distinguish between versions with and without fittings. Class A Customs provides specific NPT fitting sizes. Do not assume a tank includes an inlet, vent, outlet, or valve unless the product details say so.
Frequently Asked Questions
Is a 50-gallon tank always exactly 50 gallons?
No. For example, the RecPro models use “50 Gallon” in their names but list an actual capacity of 48.5 gallons.
Can a fresh-water tank be used for black water?
Do not assume so. The Class A Customs T-5000 is described for fresh or gray water, not black water.
Which listed tanks have dimensions provided?
Tough Grade and both RecPro versions list dimensions of 53 by 27 by 10.5 inches. The T-5000 lists 38.25 by 14.25 by 22.25 inches, excluding fittings.
Should I choose a tank with fittings?
Choose based on your installation plan. A fittings version may suit buyers seeking included connections, but verify fitting types and placement before ordering.