
The Weber Smokey Mountain (WSM) cooker is a popular choice for barbecue enthusiasts, with many choosing to use the water pan to help regulate temperature and moisture. While some prefer to cook without water in the pan, lining it with foil makes cleaning easier and can help catch grease. The water pan is placed above the coals, secured to the lower grate with a clip, and its shape, size, and capacity vary across WSM models. The water helps maintain low and slow barbecue temperatures by absorbing heat energy and turning into steam, which fills the cooking chamber and surrounds the meat. This technique also helps smoke stick to the meat, imparting flavor and creating the signature pink smoke ring. While the water pan is a standard feature, some users opt for alternatives like diffusers or foil-wrapped pans to improve temperature control and avoid the hassle of refilling water.
Weber Smokey Mountain Water Pan
| Characteristics | Values |
|---|---|
| Purpose | To hold water during the cooking process |
| Benefits of using water | Makes "low & slow" barbecue temperatures easy to achieve and maintain, keeps moisture in the chamber, helps maintain temperature, helps smoke stick to the meat, imparts flavour to the meat |
| Downsides of using water | Water level must be checked and refilled, potential for serious injury if the water pan is filled in an unsafe manner or falls into hot coals |
| Alternative to water | Wrap the pan in foil, fill with sand, use a clay pot dish, use a diffuser at the charcoal chamber |
| Benefits of using foil | Easier to clean, no gunk in the water to clean out, no risk of grease fire |
| Downsides of using foil | Requires a shallower pan |
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What You'll Learn

Benefits of using water in the pan
The Weber Smokey Mountain Cooker is a barbecue that can be used for smoking at low and slow temperatures. The water pan is placed above the coals, secured to the lower grate with a clip. Here are some benefits of using water in the pan:
Moisture and Temperature Control
Water in the pan helps to maintain moisture in the chamber and regulate temperatures. It takes a significant amount of energy to heat water to its boiling point of 212°F, and as the cooker temperature rises, more water evaporates, absorbing excess heat and keeping the cooker temperature stable. This is particularly beneficial for longer cooks, where it is essential to maintain a consistent temperature.
Smoke Infusion and Flavor Enhancement
As water in the pan boils, water vapour fills the cooking chamber and condenses on the surface of the meat. This condensation helps smoke adhere to the meat, infusing it with flavour. The smoke also contains sodium nitrite, which contributes to the formation of the desirable pink "smoke ring" associated with smoked meats.
Fire Safety
Cooking with an empty water pan, especially if it is greasy or dirty, can increase the risk of grease fires. By using water in the pan, you add an extra layer of protection against potential fires caused by grease buildup or high temperatures.
Ease of Use
While some prefer to cook without water in the pan for easier cleanup, using water can simplify the cooking process. The water pan acts as a heat sink, helping to moderate cooker temperatures without the need for constant adjustments to charcoal levels or airflow. Additionally, the water pan should be filled with warm water to prevent hot steam and ash from rising quickly if water splashes the fuel. The water pan is also placed securely on grill straps to prevent it from falling into the hot coals. Lastly, the WSM can run for 10+ hours without needing additional fuel, reducing the need for frequent refuelling.
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How to safely use water in the Weber Smokey Mountain Cooker
The Weber Smokey Mountain Cooker is a popular choice for barbecue enthusiasts, with many choosing to use water in the pan to help regulate temperature and maintain moisture. Here are some detailed instructions on how to safely use water in the Weber Smokey Mountain Cooker:
Prepare the Water Pan
Firstly, it's important to ensure your water pan is secure. The Weber Smokey Mountain Cooker has grill straps at the bottom of the middle cooking section to suspend the water pan. If your pan seems unsteady, do not add water until the problem is resolved. You can modify the grill straps to help the pan fit more securely.
Add Water
With the middle cooking section off the fire, place the water pan securely on the grill straps. Put the bottom cooking grate into the middle cooking section, and then place the entire section over the hot coals in the charcoal bowl. Pour water into the pan immediately before it gets hot, pouring into the centre of the pan through the bottom cooking grate.
Benefits of Using Water
Water helps to regulate temperature by acting as a heat sink. It takes a lot of energy to heat water, so if your cooker gets too hot, the water will boil away, consuming heat energy and keeping the temperature down. This also helps to maintain moisture in the chamber, preventing food from drying out.
Alternatives to Water
Some people choose not to use water in their Weber Smokey Mountain Cooker. One alternative is to wrap the pan in aluminium foil, which makes cleanup easier. Others fill the pan with sand or use a clay pot dish. Some people also use a diffuser at the charcoal chamber to help distribute heat more evenly.
Safety Considerations
It is important to keep your cooker clean to avoid grease fires, especially when cooking at high temperatures with an empty water bowl. Always shut down the vents and replace the lid after cooking to reduce airflow to the coals. Ensure there are no activities taking place near the unit that could result in injury, especially with children around.
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Why Weber switched to a deep pan in 2009
The Weber Smokey Mountain Cooker (WSM) is a popular barbecue smoker that utilizes a water pan to regulate temperature and moisture during the cooking process. The presence of water in the pan acts as a heat sink, absorbing and moderating heat to maintain a stable temperature. Additionally, as the water boils, it produces water vapour that fills the cooking chamber, helping smoke adhere to the meat and imparting a distinctive flavour.
In 2009, Weber made a significant change to the design of their Smokey Mountain Cooker by introducing a deeper 2.5-gallon water pan. This modification was implemented in response to customer feedback regarding the capacity of the previous water pan. The new deeper pan was designed to address these concerns and provide an enhanced smoking and cooking experience.
However, the introduction of the deeper water pan also presented some challenges. One of the most notable issues was the difficulty in wrapping the pan with foil. The increased depth made it cumbersome to achieve a proper fit with a single sheet of foil, which had been possible with the older, shallower pans. This inconvenience led some users to explore alternative solutions, such as Dutch oven liners or foil-wrapped terracotta plates, to facilitate easier cleanup.
Another consequence of the deeper water pan was its lower-hanging profile. In some cases, the pan's depth caused it to come into contact with the charcoal and smoke wood in the charcoal chamber. This obstruction made it challenging to add charcoal or stir the coals during the cooking process, particularly for those who preferred to use lump charcoal or required longer cooking sessions.
Despite these challenges, the deeper water pan offered certain advantages. Its increased capacity provided more water vapour, which could be beneficial for regulating temperature and moisture levels during smoking. Additionally, the deeper pan could be useful for those seeking to cook with larger volumes of water or utilize the pan for specific recipes or cooking techniques.
In conclusion, Weber's decision to switch to a deep pan in 2009 was likely driven by their commitment to addressing customer feedback and improving the functionality of their Smokey Mountain Cooker. While the deeper pan introduced some complexities in terms of foil wrapping and charcoal management, it also offered benefits related to temperature control and moisture retention. Ultimately, the design change reflected Weber's ongoing efforts to enhance the smoking and grilling experience for their customers.
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How to clean a Weber Smokey Mountain
To clean a Weber Smokey Mountain, you should regularly check the inside of the lid for any flaking. If it appears dry and flaky, use a stiff-bristled brush to remove the flakes, or spray the inside of the lid with a garden hose, scrub, and rinse. Brush any ashes or flakes in the middle cooking section down into the bottom of the cooker.
Make sure the water pan is clean. To make cleaning the water pan easier, cover it with heavy-duty aluminium foil before use. You can also fill the pan with sand, which will retain heat and help regulate temperature. Ashes that seem cold on the surface may still be hot inside, so take care when handling and disposing of them. The safest way to dispose of ashes is to put them in a small metal trash can dedicated to ash storage. Let the ashes sit for a long time to ensure they are fully extinguished before disposing of them in the garbage.
Spray the grates with non-stick cooking spray before use to make cleaning them easier. To dispose of the contents of the water pan, you can bag the fat and water with cold ashes using a heavy-duty trash bag, or allow the fat to solidify on the surface of the water, skim it off, and pour the remaining liquid down the sink.
The plated finish will break down over time with normal use, allowing rust to set in. The rust tends to start on the bottom of the grates and works its way up. Cooking grates should be replaced when the rust reaches the top surface where it would come into contact with food.
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How to avoid common mistakes when using a Weber Smokey Mountain
The Weber Smokey Mountain (WSM) is a popular choice for barbecue enthusiasts, but there are some common mistakes to avoid when using this cooker.
Firstly, it is important to remember that the grill grate is not the place to prepare your meat. Cutting, sliding, or jiggling the meat on the grill grate can knock it out of place, leading to accidental spills and potential safety hazards. Keep your cooker clean to avoid grease fires, especially when cooking at high temperatures with an empty water bowl. Grease fires are extremely dangerous, with flames that can quickly spread and cause significant damage.
When using the water pan, always ensure it is securely attached to the lower grate with a clip, hovering above the coals without touching them. The water pan helps to diffuse heat and stabilize temperatures, but it should not be used when cooking with the direct method over hot coals. If you choose to cook without water in the pan, line it with foil for easier cleanup, but be aware that temperatures may fluctuate more.
Be cautious when handling the WSM during use, as the exterior gets very hot. Keep children and other activities at a safe distance to prevent burns and injuries. Always shut down the vents and replace the lid after cooking to reduce airflow to the coals and avoid the risk of fire. Finally, resist the urge to remove the lid when the temperature spikes, as this will only make the fire burn hotter due to increased oxygen flow.
By being mindful of these common mistakes and taking the necessary precautions, you can safely enjoy delicious smoked meats and other dishes prepared in your Weber Smokey Mountain.
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Frequently asked questions
Water in the pan makes “low & slow” barbecue temperatures easy to achieve and maintain. It also keeps moisture in the chamber, helps with maintaining temperatures, and makes it easier to manage the heat.
The water pan is placed above the coals, secured to the lower grate with a clip. The water pan is suspended by four grill straps at the bottom of the middle cooking section. With the middle cooking section off the fire, put the water pan in place, then pour water into the centre of the pan.
Foiling the water pan can make cleanup easier. You can use a single sheet of wide aluminum foil, or a Dutch oven liner. If using foil, some people recommend creating a slight depression in the foil.
Some people use a clay pot dish, a pizza pan, or a diffuser at the charcoal chamber. If using an alternative, you may need to adjust the WSM grill straps for a stable fit.







































