How Many Gallons In A 30lb Propane Tank

How Many Gallons In A 30lb Propane TankYou will find that there are several different propane tank. After that it can be filled through the ACME fill valve. For example: A 500 gallon propane tank at 40% = 500 x 0. Dimensions: 7'10" long and 30" in diameter Uses: Supplemental heating or 2 home appliances including water heaters, generators, and pool heaters. With a 30,000 BTU heater, you will need one gallon of propane every three hours. Full BTU content is 18,300,000 BTUs; that’s enough to provide 10,000 BTU/h for 76 days And 6 hours. Twenty-pound propane tanks are most often used to fuel gas grills. One regulator may work well on a gas grill but may be too small for a home heating system. This time, we’ll multiply 7 by 91,502 to get 640,514. Common Propane Tank Sizes and Their Uses. According to the EIA, 1 gallon of propane has an energy content of 91,452 BTU. A 30-pound propane tank measures 24 inches high and 12. How Long Does a 40 LB Tank Last in an RV?. 20 lb/gallon at temperatures between 60°F and 90°F), we can practically say that a 40 lb propane tank holds about 8 gallons of propane. Capacity: Holds about 200 gallons of propane when full. Where is the propane tank on an RV? The RV propane tank may be in a couple of different locations, again depending on exactly what kind of setup you have. How many liters are in a 30 lb propane tank?. Our steel 30lb cylinder is of the highest quality. Propane BTU 101: Your Guide to understanding BTUs …. Knowing how many gallons your propane tank holds can help you budget for the future and gauge the relative size of the tank for moving or storage purposes. Propane may be a gas, but it weighs 4. If you are not camping in the winter (and using the furnace) you could find a single 30 pound tank will last for several weeks to a month or more of continuous camping (I'm assuming you have the fridge and hot water heater on propane here. 30 lb Manchester Propane Tank with Gas Gauge: 30 lbs / 6. How Many Gallons of Propane in a 40-Pound Tank? A 40-pound propane tank is used for large RV’s. Propane volume, usage and efficiency varies based on things like temperature so while this calculator can give you a very good idea of how much propane your tank will hold, and how many BTU it will produce, it won't be exact. Propane tanks for sale in capacities of 5 lb (1. 1 gallon = 138,500 BTU. Same with underground propane tanks that hold up to 2,000 gallons: The minimum distance, from either a building or a property line, is 10 feet. A 20 pound propane tank is designed to hold. You would have to use math to figure out a load of propane versus the weight of your tank. The tank has a 96-gallon capacity. " What is the weight of a gallon of propane? The weight of a gallon of propane. A 500-gallon propane tank can also be used commercially by businesses like restaurants or dry cleaners that rely on multiple large gas appliances. 52 gallons * 0. It can be filled at the local price per gallon at any U-Haul center that carries propane. Every propane tank comes with a series of letters and numbers stamped on its collar (the round piece at the top of the tank). That said, the tanks may be 20 gallons, 30 gallons, 40 gallons, or even larger. These figures are approximate and can only be used to determine estimated gallons in the tank. To estimate propane usage: There are approximately 91,000 BTUs in a gallon of propane or 21,600 BTUs per pound. How Many Gallons In a 20 lb Propane Tank? Propane Pounds Per Gallon Chart How to Gauge How Much Propane Is Left in Your Tank. 1 gallon of propane yields 91,451 BTU and will cost you $2. 7 gallons of propane. 5 gallons, therefore a full tank will weigh approximately 55 pounds. 20 lb and 30 lb propane tanks can hold 3. For a 30-pound tank, only 7 gallons of propane are stored. How Long Does Propane Last? (Burn Time Calculator). Propane Tank Expiration & Propane Disposal. To determine how much gas is in your propane tank, multiply the outage reading by the capacity of the tank. That said, the tanks may be 20 gallons, 30 gallons, 40 gallons, or even larger. This Worthington Pro Grade tank is refillable so you can use it for years to come. See reference above for 20-pound tank adapter. 20 lb, 30 lb, 40 lb Tanks Typically used for grilling and patio heaters Holds 5 gallons of propane Very portable, easy to pick up Refill by stopping by our office conveniently located in Old West Durham 2907 Hillsborough rd 33 lb Tank Used to power forklifts 2’ tall, 1’ in diameter Holds 8 gallons of propane Can be picked up and moved by one person. Flame King 30 LB Propane Cylinder Steel Propane Tank. For a total of 200 gallons left in the tank, multiply 4 by 15. Use our propane tank sizes share to to figure out exactly which propane tank if right for you. That means that a 30 lb. The 30 pound propane tank holds about 7 gallons of propane and it usually supports your furnace, fridge, burners and water heater. 1,000-gallon propane tank uses. 1 gallon of propane yields 91,451 BTU and will cost you $2. It is built from high grade welded steel and powder coated for rust prevention. 7 and 5 gallons of propane into an empty 20 lb propane tank, but that is not safe. 30 Lb Propane Tank With Float Gauge?. Empty Propane Tank accompanies your BBQ grill (sold separately) and accommodates up to 7. The typical propane tank holds between four and five gallons of propane, but there are numerous sizes of propane tanks that can hold anywhere from a single gallon to hundreds of gallons. A 25 pound container holds about 7. Are Propane Tank Gauges Accurate? If there is a 40% fill rate for a 500 gallon tank, it has 500 gallons divided by 0. If you multiply the 24 hours by 7, then you get 168 hours of propane use. 1,000-gallon. The trick in estimating usage is guessing how often and how long the furnace runs. 4 gallons of propane in a 30 lb tank when it is 80% full. You will find that there are several different propane tank sizes out there. A 1,000-gallon tank is used for heating and appliances in extremely large homes (more than 4,500 square feet). What you need might depend on what you are using to power. How long does 30 lbs of propane last?. In making accurate calculations, one must take into account the weight of the valve assembly. 5 gallons so a full tank will weigh about 55 pounds or so. How Many Gallons of Propane Are in a Tank? (With Size Chart). With that information in mind, there are only about 6. Tanks usually measure around the tank size it says on the lever when unfilled. Thanks for asking! –Joseph 5/19/2015 3:52:17 PM. 30 Lb Propane Tank Exchange: Can You Exchange a 30lb Tank?. "The empty weight of a common steel "30 pound" liquid propane tank is around 25-28 pounds. How Many Gallons in a 30lb Propane Tank: Everything You Need to Know. 25 pounds per gallon. Cylinder Sizes & Specifications | Eagle Propane Sales Cylinder Sizes & Specifications *All dimesions are approximate. propane tank can run our appliances for 16 hours before running out. 85 gallons of propane,. You would have to use math to figure out a load of propane versus the weight of your tank. Propane Tank Sizes For Your Home. For above-ground tanks of 1,000 to 2,000 gallons, the safe distance increases. The 30 pound propane tank holds about 7 gallons of propane and it usually supports your furnace, fridge, burners and water heater. 4 = 200 gallons remaining in the tank. Important: propane tanks are often only filled to 80% capacity to allow the propane to safely expand. How To Tell How Full (or Empty) Your Propane Tank Really Is. 79 gallons of propane in a 40 lb propane tank. If someone says that it is a 7-gallon tank, they may be rounding up and not stating the true capacity size. 6 gallon), and 420 lb (120 gallon). Propane gas is generally expressed in gallons and propane tanks can hold a specified maximum number of gallons of propane gas when full. The 80% fill rule is a preventative safety measure against the fluctuations that happen inside a tank. How much does a 30 lb propane tank weigh empty and full?. How Much Does an Empty Propane Tank Weigh? An empty 20 lb propane tank weighs. How Many Gallons of Propane in a 20 lb Tank. How Can I Tell What Size Propane Tank I Have?. For example, assume a propane tank has a TW of 8 lbs. Empty Propane Tank accompanies your BBQ grill (sold separately) and accommodates up to 7. A 30 pound cylinder holds approximately 7 gallons of propane. How Long Does Propane Last in an RV? (Free Calculator). So why aren’t propane tanks ever filled up all the way? That has to do with the 80% fill rule. How Many Gallons In a 20 lb Propane Tank (Propane Tank Sizes)">How Many Gallons In a 20 lb Propane Tank (Propane Tank Sizes). 1 gallons of gas. Given that the amount of gallons that goes into a propane tank varies a bit with temperature (propane density between 4. Propane Tanks for Forklift and Buffing Machines We also carry propane tanks for forklifts and propane tanks for buffing machines. The 20lbs tank is the most popular tank size and it's better know by its nickname "patio" because of its use for patio heaters. To determine how much gas is in your propane tank, multiply the outage reading by the capacity of the tank. What Size Are RV Propane Tanks? (Helpful Guide). A 40 lb propane tank holds 9. Capacity: Holds about 200 gallons of propane when full. A 30-pound propane tank is 24 inches tall, and a 20-pound propane tank is 18 inches tall. 20 lb, 30 lb, 40 lb Tanks Typically used for grilling and patio heaters Holds 5 gallons of propane Very portable, easy to pick up Refill by stopping by our office conveniently located in Old West Durham 2907 Hillsborough rd 33 lb Tank Used to power forklifts 2’ tall, 1’ in diameter Holds 8 gallons of propane Can be picked up and moved by one person. 180 litres, 200 lbs) How much does it cost to fill a 30 lb propane tank? The cost to refill a propane tank varies from $3. If you multiply the 24 hours by 7, then you get 168 hours of propane use under normal circumstances. 4 gallons of propane, and when full it weighs 71 lbs. If you were to fill the tank all the way, then there should be 8 gallons of propane inside. With outdoor patio heaters, we’re dealing with 20 lb propane tanks; that’s a 4. Twenty-pound propane tanks hold about 4. They say it gets a total of 22,000 BTUs of cooking power. They can be 20-pound propane tank (9 kilograms) to 100-pound propane tank (45 kilograms) and they comfortably contain 5 gallons to 25 gallons of propane respectively. The generator should last longer if it powers a few things around your home or business. This figure represents the number of gallons of propane currently in the tank. Cylinder 30 lb propane tanks are used in grilling and outdoor fryers Most commonly found on RV's 40 Lb. A 30 lb propane tank holds 7 gallons of propane when completely full. Propane, like water, will expand when heat is added to it. This Worthington Pro Grade tank is refillable so you can use it for years to come. Especially if you have a special rig set up for full-timing or long-term camping. 1 gallons of propane. According to a major 20-pound propane tank producer, Blue Rhino, their 20-pound propane tank will only contain about 4. 250 gallon residential propane tank is 7 feet 8 inches long, with a diameter of 30 inches. Tell What Size Propane Tank I Have?. 4 gallons of propane and weigh in the neighborhood of 58 to 71 pounds. 76 less per gallon by refilling your propane tank rather than exchanging it. A 40-pound propane tank measures 29 inches high and 12. When the furnace is running it will run through a gallon of propane every 2. 00 a gallon at most U-Haul propane refill locations. A 30 lb propane tank holds 7 gallons of propane when completely full. The cost to refill a propane tank varies from $3. propane tank contains 7 gallons when full. 125 pounds per gallon, and a "30 pound tank" will carry roughly 7. How Many Gallons In a 50 lb Propane Tank (Propane Tank Sizes). These must be placed at least 25 feet from a building or property line. 30 lb Manchester Propane Tank with Gas Gauge: 30 lbs / 6. 200 lbs (40g) 420 lbs (80g). 11 lb/gallon = 7. 4 Gallons of Propane, Not 5 80% is now considered “FULL” due to safety reasons. 120 Gallon Propane Tank Dimensions: 4'6" in height and 30" in diameter Uses: 1-2 residential appliances. Propane Cylinders and LP Gas Bottles">Propane Cylinders and LP Gas Bottles. Benefits: A 250-gallon horizontal propane tank can support moderate propane uses and help bridge the gap between small and large users. A 30 lb tank holds 7 gallons of propane, and when full it weighs 54 lbs. A 250 gallon propane tank holds 200 gallons of propane when full. Plac it on the scale and read the scale's display to determine the current weight. How many gallons of propane are in a 120-gallon tank? Some of you may recognize this as a trick question. Propane weighs approximately 4. How Many Gallons In a 20 lb Propane Tank? Propane Pounds Per Gallon Chart How to Gauge How Much Propane Is Left in Your Tank. 504 at 60º F, which equals approximately 4. A 20 pound propane tank is designed to hold about 20 pounds or 4. According to the national standards publication NFPA58, a propane tank with 20 pounds (5 Gal) of gas at 70°F would have a pressure of 145 psi; at 90°F, pressure would increase to 180 psi; at 105°F, pressure continues to rise to 235 psi, and at 130°F, pressures of 315 psi would be reached. On average, you spend less per gallon by refilling your propane tank rather than exchanging it. In fact, propane tanks are equipped with an OPD (Overfill Prevention Device) that prevents the tank from being more than 80% filled. 1 gallon (US) is equal to 0. But consider a few other factors: Propane is $. First fill requires propane provider to break the suction seal by filling the POL valve with Methanol. A 30-pound propane tank measures 24 inches high and 12. This formula can apply to any other size propane tank as well. Then divide that figure by our 40,000 BTUs of appliance usage. Cylinder 30 lb propane tanks are used in grilling and outdoor fryers Most commonly found on RV's 40 Lb. Benefits: A 250-gallon horizontal propane tank can support moderate propane uses and help bridge the gap between small and large users. Put your tank. It does not matter if you have a large propane tank or a small 5 gallon propane cylinder, almost all applications require a pressure regulator. 1 gallons of liquid propane which weighs just 17 pounds. A propane tank has an empty weight called a “tare” weight that you should check with a scale. Liquid propane has a specific gravity of 0. How Long Does an RV Propane Tank Last (Heat, Fridge, Water). Understanding Propane Tank Sizes. 8 gallon), 60 lb (14 gallon), 100 lb (24 gallon). Typically used for grilling and patio heaters; Holds 5 gallons of propane; Very portable, easy to pick up. How Many Gallons Of Propane In A 30 Lb Tank?. That means that a full 20 lb propane tank contains 4. Why is this important to know?. If you multiply the 24 hours by 7, then you get 168 hours of propane use under normal circumstances. A 30-pound propane tank is 24 inches tall, and a 20-pound propane tank is 18 inches tall. Twenty-pound propane tanks are most often used to fuel gas grills. 236 X tank capacity in pounds = tank capacity in gallons Let’s apply this formula to a 50 pound propane tank. Capacities: Empty shipping weight: 23. Propane 101, Propane Regulator Facts. Continuing the same example, 16 / 4. That is a lot of fuel for your 30,000 BTU furnace to use up. 20 lb/gal at the same temperature. There are four cylinders in propane. 91 litres) 40 Gallon (approx. 20 pounds is considered maximum regulation full. propane tanks are commonly used for cooking and heating RV's. Product Description Part Number: OPD30 UHaul offers a 30lb upright cylinder which features a rugged, consistent design intended to withstand the rigors of construction, camping, and all other purposes. Model / Size: 20 lbs 30 lbs 40 lbs 60 lbs 100 lbs 100 ASME 200 lbs (40g) 420 lbs (80g). When it is full, it weighs roughly 48 to 54 pounds. A full tank weighs roughly 55 pounds in gallons so it can weigh about 5 gallons. A 30 pound cylinder holds approximately 7 gallons of propane. " What is the capacity of a 20lb propane tank in gallons? Propane Tank, 20. On average, a propane-powered generator will consume about 2-3 gallons every hour, which means the generator can run for 125 hours, roughly five days. Even when it is full, a propane gauge will only read 80%. Long story short – Regulations require the maximum weight of propane in a typical barbecue grill tank to be no more than 42% of 47. Overview The Flame King 30 LB Propane Tank is pre-purged vacuum ready for filling of propane avoiding you the cost and headache of purging your new tank. How Long Does A Propane Tank Last On A Patio. 125 pounds per gallon, and a "30-pound tank" will hold about 7. The 80% fill rule is a preventative safety measure against the fluctuations that happen inside a tank. The Drip Cap Propane tanks are portable. You can expect to pay an average of $200 a month, depending on how often you use it and how high you set the heat. For a 30-pound tank, only 7 gallons of propane are stored. The typical propane tank holds between four and five gallons of propane, but there are numerous sizes of propane tanks that can hold anywhere from a single gallon to hundreds of gallons. 1 Ccf (100 cubic feet) = 1 137,000 BTU. Thankfully the furnace doesn’t run constantly. Propane Cylinders and LP Gas Bottles. 40 lb Propane Tank (Gallons) = (0. “The empty weight of a common steel “30 pound” liquid propane tank is around 25-28 pounds. Liquid propane has a specific gravity of 0. A 250 gallon propane tank holds 200 gallons of propane when full. According to a major 20-pound propane tank producer, Blue Rhino, their 20-pound propane tank will only contain about 4. Large commercial barbecues, construction heaters, space heaters, propane hawk torches, and. A 30-pound propane tank is 24 inches tall, and a 20-pound propane tank is 18 inches tall. Propane Tanks For Grilling If you love to grill, here are the perfect propane tanks for your next meal or cookout. A 100-pound propane tank measures 48 inches high and 14. 6 gallons x 91,452 BTU = 420,679 BTU of energy. Tip! Depending on the weather conditions you may actually see condensation on the sides of a propane tank. 304 In the end, you can see that propane yields 47,048 fewer BTUs per gallon than heating oil. The higher the BTU per unit of fuel, the more. Residential Propane Tanks Step 1 Measure the diameter of your tank. First fill requires propane provider to break the suction seal by filling the POL valve with Methanol. 125 pounds per gallon, and a “30 pound. Dimensions: 7'10" long and 30" in diameter Uses: Supplemental heating or 2 home appliances including water heaters, generators, and pool heaters. How Heavy Is A 30 Gallon Propane Tank? There are four cylinders in propane. 250 gallon residential propane tank is 7 feet 8 inches long, with a diameter of 30 inches. 125 pounds per gallon, and a “30-pound tank” will hold about 7. The 30 pound propane tank holds about 7 gallons of propane and it usually supports your furnace, fridge, burners and water heater. Regardless, you’ll likely be able to save on whole-house heating costs by using a propane wall heater to warm an area. 20 lb and 30 lb propane tanks can hold 3. 13368 gallons/ft 3 = 1. When the furnace is running it will run through a gallon of propane every 2. 00 a gallon at most U-Haul propane refill locations. The more common propane tank is the 40 pound model. For 125- to 500-gallon propane tanks, the distance is at least 10 feet – from any building and from any property line. 79 Gallon Of Propane Here you have it: You can fill 7. When you notice your tank running low, you can determine how empty it is if you can measure it. Can You Run a Propane Generator 24 Hours a Day?. To determine how much gas is in your propane tank, multiply the outage reading by the capacity of the tank. Cylinder 30 lb propane tanks are used in grilling and outdoor fryers Most commonly found on RV's 40 Lb. Weigh your propane tank You might use this multipurpose luggage scale: >>. Liquid propane has a specific gravity of 0. How Long Will A Generator Run On Propane?. It does not matter if you have a large propane tank or a small 5 gallon propane cylinder, almost all applications require a pressure regulator. 1 gallons of liquid propane which weighs just 17 pounds. Steel Propane Tank (30 lbs. According to a major 20-pound propane tank producer, Blue Rhino, their 20-pound propane tank will only contain about 4. On average, you will be spending $1. Use the formula below to determine how many gallons are in your propane tank: 0. 250 Gallon Tank. propane tanks are commonly used for cooking and heating RV's. Federal regulations require most propane grill tanks to be recertified or replaced every 10 years after the date of manufacture. How Many Gallons in a 30lb Propane Tank: …. However, this information is only for. Mr Heater Buddy (4,000 – 9,000 – 18,000 BTU) >> MH18B (up to 18,000 BTU) Indoor-Safe (amzn) The 18,000 BTU model will accept two 1-lb propane bottles. That works out to be one week's worth of fuel under normal circumstances. A 30 pound propane tank holds 7 gallons and weights 55 pounds when filled. In reality, a 20-lb propane tank is about 80% full, so the most you can put in is 4 gallons. When you notice your tank running low, you can determine how empty it is if you can measure it. Dimensions: 7’10” long and 30″ in diameter. There are four cylinders in propane. 250 Gallon Tank. The tank has a 96-gallon capacity. Common Uses: Auxiliary heating, including water heaters, generators, and pool heaters. Knowing how many gallons your propane tank holds can help you budget for the future and gauge the relative size of the tank for moving or storage purposes. A typical steel 30 pound liquid propane tank weighs about 25-28 pounds empty. On their product page it estimates a 1 hour burn time so that’s. Your Propane Tank Really Is">How To Tell How Full (or Empty) Your Propane Tank Really Is. That means that a full 20 lb propane tank contains 4. 5” tall and 30” in diameter Capacity: Holds about 96 gallons of propane when full Benefits: Although a 120-gallon tank is not easy to move around, its ability to be used for almost anything is amazing!. Tanks usually measure around the tank size it says on the lever when unfilled. How Many Gallons In a 20 lb Propane Tank (Propane Tank Sizes). Cylinder Sizes & Specifications | Eagle Propane Sales Cylinder Sizes & Specifications *All dimesions are approximate. Propane weighs about 4. The 20lbs tank is the most popular tank size and it’s better know by its nickname “patio” because of its use for patio heaters. How many gallons of propane are in a 120-gallon tank? Some of you may recognize this as a trick question. 30 lb Manchester Propane Tank with Gas Gauge: 30 lbs / 6. 1 gallon = 91,452 BTU. 5 gallons so that a full tank will weigh about 55 pounds. It can hold a maximum of 200 gallons (80% rule) Empty weight: 483 pounds. 6 gallons of liquid propane, and 30-pound tanks hold about seven gallons. 5 gallon), 40 lb (10 gallon), 50 lb (11. Propane may be a gas, but it weighs 4. In my example, 16 pounds is 4/5 full, or 80%. It does not matter if you have a large propane tank or a small 5 gallon propane cylinder, almost all applications require a pressure regulator. 4 = 200 gallons remaining in the tank. With 7 gallons inside your 30-pound propane tank should have 574,000 BTUs approx. 6 = 16 pounds of propane 20 pounds is considered maximum regulation full. The empty propane tank weighs about 20 pounds so if you add the 17 pounds of gas you have a full propane tank weighing around 37 pounds. 20 pound propane tank run times based on typical ‘full’ fill level of 4 gallons, and propane weighing 4. Gallons of propane your tank holds when filled to 80% 4. For example: A 500 gallon propane tank at 40% = 500 x 0. With outdoor patio heaters, we’re dealing with 20 lb propane tanks; that’s a 4. 1 gallon (US) is equal to 0. It’s rated for 22,000 BTUs (11,000 each hob) so I enter that in the first field with 1 lb of gas in the 2nd field. This accounts for the fact that the tank can only be filled to 80%. 180 litres, 200 lbs) How much does it cost to fill a 30 lb propane tank? The cost to refill a propane tank varies from $3. A 30 pound propane tank holds 7 gallons and weights 55 pounds when filled. Compared to exchanging a tank, which on average costs from $5. 5 gallons so that a full tank will weigh about 55 pounds. 91 litres) 40 Gallon (approx. 20 lb and 30 lb propane tanks can hold 3. Knowing how many gallons your propane tank holds can help. Where is the propane tank on an RV? The RV propane tank may be in a couple of different locations, again depending on exactly what kind of setup you have. Can You Run a Propane Generator 24 Hours a Day?. A 500-gallon propane tank can also be used commercially by businesses like restaurants or dry cleaners that rely on multiple large gas appliances. Propane may be a gas, but it weighs 4. A standard-sized propane tank is 20 lbs (9. On their product page it estimates a 1 hour burn time so that’s pretty close. According to the Propane 101 website, a 20-pound propane tank measures 18 inches high and 12. com">Propane 101, Propane Regulator Facts. On average, a propane-powered generator will consume about 2-3 gallons every hour, which means the generator can run for 125 hours, roughly five days. So why aren’t propane tanks ever filled up all the way? That has to do with the 80% fill rule. Twenty-pound propane tanks hold about 4. At this temperature, 1 pound of propane is roughly equivalent to 0. The cost to refill a propane tank varies from $3. 5 gallons, while a 30 pound tank can hold about 125 pounds. It's fairly lightweight so you can also easily take it around with you to get refilled and to wherever you need it. 6 gallons of liquid propane, and 30-pound tanks hold about seven gallons. 35 lbs) per gallon. According to the EIA, 1 gallon of propane has an energy content of 91,452 BTU. But this depends on the generator’s size and load. A 30 lb tanks holds approximately 7 gallons of propane. The easiest way to calculate how many gallons are in a propane tank is to use the pound to gallon conversion whenever the temperature is 60 degrees Fahrenheit. 120 Gallon Tank (AKA 100 Gallon Tank or 420 LB Tank) Dimensions: 54. They can be 20-pound propane tank (9 kilograms) to 100-pound propane tank (45 kilograms) and they comfortably contain 5 gallons to 25 gallons of propane respectively. So if Obama was still president the last time you checked your propane tank’s expiration date, it is definitely time to take another look -- it may just be time to exchange your grill’s tank for a fresh one. 7 and 5 gallons of propane into an empty 20 lb propane tank, but that is not safe. With 7 gallons inside your 30-pound propane tank should have 574,000 BTUs approx. 120 Gallon Tank (AKA 100 Gallon Tank or 420 LB Tank) Dimensions: 54. 20 lb, 30 lb, 40 lb Tanks.