Propane cylinder refill or exchange, which is better

Refilling your propane cylinder is almost always the better deal. You keep your own bottle, it is filled to its proper capacity, and you pay for the gas that actually goes in. An exchange cage swaps you for somebody else’s bottle, typically filled well short of full.

The exception is convenience at an odd hour, and that is a real exception worth naming. Here is the comparison for grill bottles, RV cylinders and forklift tanks. Part of our complete guide to propane tanks.

What is the difference between refill and exchange

A refill puts propane into the cylinder you already own. An exchange takes your empty and hands you a different filled one.

A refill is measured

Your bottle goes on a scale or a meter and is filled to its rated capacity. You can watch it happen, and you pay for the propane that went in.

An exchange is a swap

You hand over an empty and take a full one from the cage. The convenience is genuine. What you give up is your own cylinder and any knowledge of how much gas you just bought.

Which one gives you more propane

A refill, because the bottle is filled to capacity rather than to whatever the exchange program decided to put in.

Exchange bottles are often not full

Exchange cylinders are commonly filled short of the capacity a 20 pound bottle holds. Nothing is hidden about it, the weight is printed on the sleeve, but few people read it and almost nobody compares it against a refill.

So compare per gallon, not per swap

The question is never which ticket is smaller, it is how much propane you got for it. Ask us what a refill of your bottle comes to and compare that against the cage.

What about the condition of the bottle

With a refill you keep your own cylinder and you know its history. With an exchange you inherit whatever was in the cage.

Your bottle stays yours

If you bought a good cylinder, refilling means you keep it. People who have spent money on a decent bottle are often annoyed to learn an exchange takes it away permanently.

Cylinders have an expiry date

Every portable cylinder carries a manufacture date stamped on the collar, and after a set period it must be recertified before anyone can legally refill it. We check that date and we recertify at our locations.

We will tell you if yours is done

If a cylinder is out of date or damaged we will say so rather than fill it. That is not us being difficult, it is the rule, and it is the right rule.

When is exchange the better choice

Exchange wins in one situation, and we would rather say so than pretend otherwise.

Situation	Better option	Why
Normal grill use at home	Refill	More gas, you keep your bottle
RV, and you are filling regularly	Refill	Cost per gallon matters when you do it often
Forklift or commercial cylinders	Refill	Volume, and the bottles are yours
It is late and we are closed	Exchange	A cage is open when we are not
Your cylinder is out of date	Recertify or replace	Nobody can legally refill it as it stands
Bottle is rusty or damaged	Replace it	Condition beats cost on a pressure vessel

The out of hours case is real

If the bottle runs dry on a Sunday evening with guests waiting on dinner, the cage wins. We are not going to pretend otherwise.

How to look after a cylinder

A grill bottle gets treated worse than any other piece of propane equipment people own, and it is the one they carry in the car.

Transport it upright and secured

A cylinder should travel standing up and tied off so it cannot roll. Lying a bottle on its side puts the relief valve in the wrong place, which is the one thing you genuinely do not want on a hot Texas afternoon.

Do not leave it in the car

Take it straight home. A closed vehicle in a Hill Country summer gets hot enough to matter, and a cylinder is not designed to be stored that way.

Store it outside, never indoors

A cylinder lives outdoors, upright, out of direct sun where you can manage it, and away from anything that could ignite. Not in the garage, not in a shed with the mower, and never in the house.

Check the valve and the hose

Before you connect, look at the valve and the hose for cracking or damage. If you smell propane after connecting, shut the valve and stop. Propane carries an added odorant precisely so you get that warning.

Where can you get a cylinder refilled

At our locations. We fill grill bottles, RV cylinders and commercial cylinders, and we recertify. We also supply and service dispensing units for businesses that fill bottles for their own customers.

Bring the bottle, not the grill

Disconnect the cylinder and bring it on its own. Carry it upright and secured, and do not leave it in a hot closed vehicle for the afternoon.

Commercial and forklift cylinders

Forklift cylinders are a different bottle again, with a liquid draw and a different valve, and they sit horizontally in a bracket rather than standing up.

We fill those too, and for a business running several the arithmetic against an exchange program stops being close. If you run a warehouse or a job site from Burnet down to Cedar Park, talk to us about a schedule rather than waiting until a truck stops.

RV tanks that do not come off

Plenty of RVs have fixed tanks that cannot be carried in. Bring the whole vehicle and we will fill it in place.

Frequently asked questions

Is it cheaper to refill or exchange a propane tank

Refilling almost always gives you more propane for your money, because the cylinder is filled to capacity rather than to whatever the exchange program puts in. Compare per gallon, not per swap.

How much propane does a 20 pound grill cylinder hold

A 20 pound cylinder is rated to hold 20 pounds of propane when properly filled, which is what a refill gives you. Exchange bottles are frequently filled below that, and the weight is printed on the sleeve.

Can you refill any propane cylinder

Any cylinder in good condition and within its certification date. We check both, and we recertify at our locations when the date has passed.

How long is a propane cylinder certified for

A set period from the manufacture date stamped on the collar, after which it needs recertifying before a refill. Bring it in and we will read the date.

Can I refill my RV propane tank without removing it

Yes, if it is a fixed tank. Bring the vehicle to one of our locations.

Propane does a great many jobs beyond the grill, from crop drying to forklift fuel, and the US Energy Information Administration sets out the range.