No listed product is a 50-gallon propane tank. The options below include smaller propane cylinders and one water-storage tank, so check capacity and fuel type before buying. The 100-pound cylinder is the closest listed option by propane capacity at about 23 gallons; the 30- and 40-pound cylinders are smaller. The water tank is not for propane. Use this comparison to identify which listed product may fit a smaller-scale need and when you should keep looking for a true 50-gallon LP tank.
| Product | Listed capacity | Best suited for |
|---|---|---|
| Flame King 100 lb Cylinder | 23 gallons | Buyers needing more capacity than smaller cylinders |
| Flame King 40 lb Cylinder | 40 pounds | Buyers seeking a mid-size propane cylinder |
| Flame King 30 lb Cylinder With Gauge | 30 pounds | Buyers who want a built-in level gauge |
| Flame King 30 lb Cylinder | 30 pounds | Buyers prioritizing listed testing and transport details |
| 50 Gallon Water Tank | 50 gallons of water | Water storage only, not propane |
Flame King 100-Pound Propane Cylinder
This steel cylinder is listed as a 100-pound, 23-gallon propane tank with a POL valve and collar. Its description names mixed heating systems, home fireplaces, dryers, and grills as possible uses. It is the largest propane option in this selection, but its listed capacity is still less than half of 50 gallons.
Best for: Buyers who need a larger cylinder for an appropriate propane appliance or system and do not require 50 gallons of storage. Choose this if capacity matters more than portability among the listed cylinder choices.
Limitation: It is not a 50-gallon tank. Confirm the appliance connection and installation requirements before purchase; the supplied product details do not establish compatibility with a particular setup.
Flame King 40-Pound Steel Cylinder
The Flame King YSN401 is a white steel propane cylinder with an overflow protection device valve. Its listed capacity is 40 pounds, making it smaller than the 100-pound cylinder and larger by weight than the 30-pound options in this selection.
Best for: Buyers seeking a mid-size propane cylinder rather than a bulk tank. It may suit a use where a 30-pound cylinder is insufficient but a 100-pound cylinder is not needed, subject to the appliance and setup requirements.
Limitation: The product information does not give a gallon capacity or specific dimensions. Do not treat its 40-pound rating as 40 gallons, and do not select it as a substitute for a 50-gallon LP tank.
50-Gallon Water Storage Tank
This square plastic reservoir is listed for water and non-flammable liquids, with dimensions of 38.00 inches long, 18.85 inches wide, and 22.55 inches high. It appears in the search results for 50-gallon LP tanks, but its stated purpose is water and other non-flammable liquids—not propane storage.
Best for: Buyers who need a 50-gallon water or non-flammable-liquid reservoir and want the listed dimensions for space planning. It is included to distinguish gallon capacity from fuel compatibility.
Limitation: It is not an LP tank. Do not use this plastic water reservoir to store propane or other flammable liquids.
Flame King 30-Pound Cylinder With Gauge
This 30-pound steel cylinder has a built-in gas meter gauge for checking the propane level. The listing also describes a powder-coated finish, a pre-purged vacuum-ready interior, and an overfill prevention device (OPD) valve. Those details may help buyers who value a visible level reading when managing a smaller cylinder.
Best for: Buyers who want a 30-pound cylinder with a built-in gauge. Choose this over the other listed 30-pound option if the level-reading feature is a priority.
Limitation: A 30-pound cylinder is much smaller than a 50-gallon tank. The supplied details do not state exact dimensions or gallon capacity, so check the product listing and intended setup before purchasing.
Flame King 30-Pound Steel Propane Cylinder
This 30-pound steel cylinder has a Type 1 overflow protection device valve. The listed features include a powder-coated finish, pre-purged vacuum-ready preparation, and X-ray and hydrostatic testing. The listing also states DOT and Transport Canada compliance.
Best for: Buyers who want a 30-pound cylinder and place importance on the product’s stated testing and transport details. Compare it with the gauge model if checking fuel level at the tank is more important to you.
Limitation: This cylinder does not list a built-in gauge in the supplied features, and its capacity is not 50 gallons. Verify that its valve and connection match the intended application.
Buying Guide: How to Choose a Propane Tank
Do you need 50 gallons or 50 pounds?
Start by confirming the unit in the product description. Gallons measure volume, while pounds are a common way propane cylinders are labeled. The listed 100-pound cylinder is described as holding 23 gallons, which makes clear that a 100-pound tank is not a 100-gallon tank. A 50-gallon LP tank is a different size category from the 30-, 40-, and 100-pound cylinders listed here.
If your requirement is specifically 50 gallons of propane storage, none of these five products meets it. Search for a product explicitly described as a propane or LP tank with a 50-gallon capacity, and verify the tank’s intended installation type and specifications with the seller or a qualified propane professional.
How much capacity do you need?
Choose capacity based on the appliances or equipment being supplied and how frequently you can refill the tank. The 100-pound cylinder is the largest propane option in this selection. The 40-pound cylinder is a middle option by listed weight, while both 30-pound cylinders are smaller. Product capacity alone does not establish how long a tank will run; fuel use depends on the connected equipment and operating conditions.
- Choose the 100-pound cylinder if you need the highest listed cylinder capacity in this selection.
- Choose the 40-pound cylinder if you want a mid-size option and do not need the listed 100-pound model.
- Compare the 30-pound cylinders if a smaller cylinder suits your setup; one includes a gauge, while the other lists testing and transport details.
Which valve and safety details should you check?
Read the valve description and confirm it is appropriate for your intended equipment. The supplied listings identify an OPD valve on the 40-pound model and both 30-pound models; one 30-pound product specifies a Type 1 OPD valve. The 100-pound product lists a POL valve. These descriptions are not a substitute for checking connection requirements or local rules.
Before buying, review the complete product information and consult a qualified installer when the tank will connect to a fixed appliance or fuel system. Do not modify a tank or use a container for a fuel that the manufacturer does not specify.
Is a cylinder suitable for a home or fixed installation?
Product descriptions may mention uses such as heating systems, fireplaces, dryers, or grills, but that does not confirm suitability for every appliance or installation. Tank placement, connections, capacity, and applicable local requirements matter. A portable cylinder and a stationary bulk tank are not interchangeable just because both contain propane.
For a fixed residential setup, determine the required tank type and capacity before ordering. Ask a qualified propane professional or your local authority about installation and placement requirements. The product information provided here does not specify every installation detail.
What should you measure before ordering?
Measure the available footprint and access path, including room to position or connect the tank. The water tank listing supplies dimensions, but those dimensions apply to that water reservoir only. The propane cylinder details supplied here do not include full dimensions for every model, so check the listing for measurements before planning a location.
Also consider how the tank will be filled or exchanged, how it will be transported, and whether its weight and valve type fit your needs. Follow the product instructions and applicable safety guidance for handling propane cylinders.
Frequently Asked Questions
Is there a 50-gallon propane tank in this selection?
No. The products include 30-, 40-, and 100-pound propane cylinders, plus a 50-gallon water tank. None is listed as a 50-gallon propane tank.
Is a 100-pound propane tank the same as a 100-gallon tank?
No. The listed Flame King 100-pound cylinder is described as holding 23 gallons. Pounds and gallons describe different measurements.
Can the 50-gallon water tank store LP gas?
No. Its listing identifies it as a reservoir for water and non-flammable liquids. It is not a propane tank and should not be used to store LP gas.
Which listed propane cylinder has the largest capacity?
The Flame King cylinder listed at 100 pounds, or about 23 gallons, is the largest propane option in this selection. It is still not a 50-gallon tank.
Which 30-pound cylinder includes a gauge?
The Flame King YSN330 is listed with a built-in gas meter gauge. The other 30-pound model’s supplied features do not mention a gauge.