Quick Answer
It is generally safe to store a propane tank outside in the winter as long as some basic precautions are taken. The main risks are damage from freezing temperatures and theft. To prevent freezing issues, keep the tank at least half full and place it on its side if storing for an extended period. Protecting the tank from direct wind exposure, precipitation, and standing moisture/snow will also help prevent freezing problems. Using locks, chains, or a storage box can deter theft. With proper precautions, outdoor propane tank storage in winter is safe.
Overview of Storing Propane Tanks Outside in Winter
Many homeowners use propane to fuel appliances and equipment like grills, generators, and heating units. Propane is supplied in portable tanks that are refilled as needed. Often these tanks are stored outside for convenience, even during cold winter months. This leads to the question – is it safe to leave propane tanks outside in freezing winter weather?
The short answer is yes, propane tanks can safely be stored outside in the winter if certain precautions are taken. Propane itself will not freeze in a tank since it boils at -44°F. However, potential safety issues can arise when tanks are left exposed to freezing temperatures, snow, rain, and theft. With proper care taken to avoid these hazards, outdoor propane tank storage in winter can be done without issues.
Key factors in safe winter storage include:
– Keeping the tank 50-80% full to prevent freeze-up
– Placing the tank on its side to reduce cold exposure
– Protecting from precipitation and ground moisture
– Securing the tank against theft
– Inspecting valves for damage or leaks
Following basic guidelines for winter propane tank storage allows the convenience of keeping tanks outdoors while avoiding weather-related dangers like corrosion, leaks, and explosions. This article covers winter storage best practices to keep your propane safe all season long.
Reasons to Store Propane Tank Outdoors
There are a few key reasons homeowners may prefer to store their propane tanks outside rather than indoors:
Convenience – Keeping the tank near where it will be used, like by a grill or generator, avoids having to transport it each time.
Lack of Indoor Space – Propane tanks can be large and bulky. Not everyone has an indoor area big enough to store one.
Safety – Some people worry that storing propane indoors presents a greater fire or explosion hazard than outside.
Code Compliance – Fire codes prohibit keeping propane containers in some indoor spaces or limit the quantities that can be stored inside.
Avoid Odors – Leaking or lingering propane odors can collect indoors. Storing the tank outside prevents this.
So the driving factors for outdoor propane storage are mostly convenience, lack of interior floor space, following fire codes, and avoiding risks from leaking gases collecting inside. These benefits often outweigh the extra precautions needed for safe winter storage. With a bit of planning, tanks can safely remain outside year-round.
Dangers of Storing Propane Outside in Winter
While propane itself won’t freeze, tanks left exposed to winter weather can still develop issues. The main hazards include:
Freezing Components
In very cold conditions below -40°F, rubber gaskets, plastic knobs, hoses, and valves can crack or break. This can lead to propane leaks. Prolonged icy temperatures may also cause metal fittings and joints to contract and separate.
Ice Blockages
Any residual moisture inside tank pipes and valves can freeze, obstructing propane flow. Attempting to fill or use a tank when ice has blocked the lines could damage equipment.
Corrosion
Exposure to winter precipitation, humidity, and road salt can lead to rusting or corrosion on tank exteriors, valves, and fittings. This accelerates wear and creates the risk of propane leaks.
Damage From Falling or Shifting
Tanks shifted by winter winds or knocked over by snow piles, plows, or icicles can be dented, cracked, or disconnected from supply lines. Loose tanks also risk theft.
Fire and Explosion Hazards
A spark or flame anywhere near a damaged, leaking propane tank can ignite the gas, causing an explosion hazard. Winter storms can also damage supply lines and ignite gas buildups indoors.
So while propane itself remains stable and liquid below -40°F, the components storing and supplying it can be negatively impacted by winter’s freezing temperatures, precipitation, winds, and snow/ice accumulation. But with proper precautions, these dangers can be avoided.
Is it Safe to Store Propane in the Garage Over Winter?
Many homeowners wonder if storing their propane tank in the garage over winter is a safer option compared to leaving it fully exposed outdoors. The answer is that garage storage can be safe in certain conditions:
– The garage must remain above freezing temperatures year-round. Tanks should not risk exposure to sub-zero cold.
– The tank should be kept away from direct vehicle exhaust fumes, which can corrode and damage the tank.
– Local fire codes may prohibit or restrict the quantity of propane allowed to be stored in residential garages. Always check regulations.
– Indoor storage still carries a small risk of leaked propane accumulating versus dissipating outdoors.
– The garage cannot share a common wall with living spaces, as this could allow leaked gas to enter the home.
So storing propane in an attached, climate-controlled garage that meets fire codes can be safe in winter. But a detached garage would be too cold, while an attached garage risks gas leakage indoors. The safest option is a detached garage kept above freezing all winter. Overall, outdoors is still the best place for avoiding freeze-ups.
How to Store Propane Tanks Safely Outside in Winter
By taking the right precautions, propane tanks can be safely and reliably stored outdoors even in freezing, snowy winter weather. Following these best practices for outdoor winter propane storage will prevent weather-related issues:
Keep the Tank 50-80% Full
Don’t allow the tank level to drop below 50% capacity before refilling. This provides sufficient interior vapor pressure to avoid freeze-ups within the tank.
Place Tank on Its Side
Laying the tank on its side reduces the surface area exposed to cold temperatures compared to standing it upright. Less direct exposure to icy winds helps prevent hardware freeze-ups.
Protect Against Precipitation & Moisture
Keep the tank under an overhang or enclosed structure so it stays dry. Place on pallets or blocking to avoid contact with wet ground. Snow piles should be cleared off and around the tank after storms.
Inspect for Leak Points
Check valves, fittings, and the tank surface for cracked seals, dents, or corrosion that could cause leaks. Perform repairs or replace damaged parts.
Consider Tank Insulation
For colder climates, wrapping tanks with insulating covers provides extra freeze protection. Ensure insulation won’t trap leaking gases.
Prevent Tank Theft
Secure tanks with locks and chains anchored to a fixed object. Store in a locked, ventilated cabinet or shed. Etch identification on the tank.
Shut Off Valves When Not in Use
Closing the main valve and disconnecting hoses and regulators when storage periods will be extended reduces parts exposed to weather.
Tips for Thawing a Frozen Propane Tank
If freeze-up issues do occur, here are tips for safely thawing a propane tank:
– Move the tank to a warmer area like a garage to thaw over 1-2 days. Never rapidly heat with flame or electric heaters.
– Spray freeze-blocked valves with de-icing lubricants like WD-40 or kerosene. Lightly tap to open valves once ice melts.
– Once thawed, turn the tank upside down to allow melted ice to drain from valves and lines before reconnecting for use.
– Replace any damaged rubber valves, gaskets, and hoses after thawing. Also refill the tank to prevent refreezing issues.
– Consider adding propane antifreeze before future winter storage. Use only antifreeze made for propane systems.
With proper handling, a frozen propane tank can be thawed and restored to safe working order. Preventing freezing is much easier than thawing, so utilize cold weather storage best practices.
Warning Signs of Propane Tank Freezing
Check outdoor propane tanks frequently in winter for the following signs that freezing problems may be developing:
– Ice or frost visible on valves, gauges, or lines
– Difficulty turning valves or moving tank dials
– Visible cracks, leaks, or damage around seals
– Tank feels abnormally cold to the touch
– Issues igniting propane appliances
– Reduced propane vapor pressure on tank gauges
– Flame burn issues – yellow coloring, irregular shape
Taking action at the first signs of freezing can allow you to safely thaw the tank before major ice blockages occur. If freezing is suspected, move the tank to a warmer area and call your propane supplier for assistance. Don’t attempt to force valves or lines if frozen.
Using Propane Safely in Winter
Beyond proper storage, also keep these guidelines in mind for using propane safely all winter:
– Place tanks upright and ensure appliances have adequate ventilation to avoid deadly CO buildup indoors.
– Keep exhaust vents for appliances like heaters and generators clear of snow and ice accumulation.
– Watch for signs appliances are struggling to ignite or producing irregular flames, which may indicate freezing issues.
– Never use open flames or high-heat methods to thaw propane equipment.
– Inspect supply lines for damage or leaks – snow piles can strain connections.
– Make sure tanks are secure from falling or drifting in high winds and icy conditions.
– Consider adding propane system additives or switching appliance rubbers to low-temp models.
– Know how and when to shut off the propane supply valve in an emergency.
Taking both storage and usage precautions will keep your propane operating reliably throughout the winter.
Propane Safety Tips
Beyond winter storage, following general propane safety tips year-round is important:
– Never store propane indoors or in enclosed spaces like basements or sheds.
– Locate tanks at least 10 feet from windows, heat sources, and ignition sources.
– Ensure tanks are clearly labeled “Flammable Gas” and check that valves are properly closed after each use.
– Handle propane carefully – never overfill tanks or use damaged tanks/equipment.
– Keep a carbon monoxide detector installed near propane appliances for alerts of CO leaks.
– Inspect propane components regularly for leaks, corrosion, dents, or other damage that requires replacement.
– Always turn off propane valves before disconnecting and transporting tanks.
– Know how to check propane pressure levels and when tanks need to be refilled.
– Ensure appliances are properly sized for the propane supply and rated for outdoor use if needed.
– Review safety manuals for all propane equipment and train anyone using it on proper handling.
Adhering to key propane safety fundamentals reduces the risks when using tanks year-round.
Conclusion
Storing propane tanks outside in freezing winter temperatures is generally safe when basic precautions are taken. Maintaining adequate propane capacity in tanks, protecting tanks from precipitation and moisture, securing tanks against theft, and inspecting equipment for damage are essential practices for avoiding weather-related issues. Standalone tanks in sheltered locations with lockable enclosures provide optimal winter storage conditions. While cold temperatures can create potential problems, a well-maintained and properly stored propane tank can reliably withstand winter weather and continue supplying fuel all season long. Following the best practices outlined, homeowners can safely keep propane tanks outside through even the coldest winter months.
