Do I need to seal my outdoor spa hot tub in winter?

2025-06-16

With the arrival of winter, many outdoor spa hot tub users will face a common problem: Do I need to seal my outdoor spa hot tub in the cold winter? If so, how can I seal it correctly to avoid damage to the equipment or unnecessary maintenance costs caused by low temperatures?


This article will take a deep look at whether it is necessary to seal an outdoor spa hot tub in winter and provide detailed sealing steps. We will analyze the challenges and maintenance points of outdoor spa hot tubs in winter in detail to answer your questions about how to effectively protect outdoor spa hot tubs in winter.

outdoor spa hot tub

Do I need to seal my outdoor spa hot tub in winter?

1.1 Use of outdoor spa hot tubs in winter

The design of outdoor spa hot tubs allows them to be used all year round, providing users with a comfortable spa experience even in the cold winter. In some cold regions, many people choose to use spa hot tubs in winter to enjoy the strong contrast between cold air and hot water. However, if you live in a cold area, especially those where winter temperatures drop below freezing, outdoor spa hot tubs may face some severe challenges, such as water freezing or equipment damage.


When the temperature is below freezing for a long time, the water in the water pipe is easy to freeze and expand, which may cause the pipe to burst and damage key components such as pumps and heaters. Therefore, many outdoor spa hot tub users will choose to stop using the bathtub in winter and seal it to prevent damage to the equipment.


1.2 Factors that determine whether to seal it

Whether to seal the outdoor spa hot tub depends mainly on the following factors:


● Climate conditions: If the winter temperature in your area is relatively mild, usually above zero, then there is no need to seal the spa hot tub, just do routine maintenance. However, if the temperature is below freezing for a long time, especially in areas with frequent extreme low temperatures, it is recommended to seal the spa hot tub to prevent the water pipe from freezing and bursting.

● Frequency of use: If you plan to use the spa hot tub in winter, then sealing is not necessary. Just keep the bathtub running and do a good job of water quality maintenance to prevent the water in the system from freezing. If you will not use the spa hot tub in winter, then sealing is a wise choice to protect the equipment.

● Insulation of spa hot tub: High-quality outdoor spa hot tubs are usually equipped with good insulation systems that can effectively maintain water temperature and prevent heat loss. If your spa hot tub has good insulation and can keep the water temperature within a reasonable range, you may not need to seal it. But if the tub is not well insulated or is not used for a long time, sealing can prevent energy waste and equipment damage.

spa hot tub

What are the steps to seal an outdoor spa hot tub?

If you decide to seal an outdoor spa hot tub for the winter, the correct sealing steps are crucial. The sealing process involves emptying the water tank, cleaning the equipment, and properly protecting the pipes and electrical appliances to ensure that there will be no problems when it is used again next year. Here are the detailed steps to seal an outdoor spa hot tub.


2.1 Turn off the power

The first thing to do when starting the process of sealing a spa hot tub is to turn off the power. Disconnect the tub from the power grid and ensure that the heater, pump and other electrical appliances will not run during the sealing process. For safety reasons, it is recommended to directly cut off the power switch of the tub instead of just turning off the power button on the control panel.


2.2 Drain the spa hot tub

Before closing it, you must completely drain the spa hot tub to prevent freezing and damage to the pipes, pump, and heater.


● Draining steps: First, find the drain outlet of the spa hot tub. Most spa hot tubs are equipped with a drain valve located near the bottom of the tub. Connect the drain hose to the drain valve and then direct the water to a safe drainage area to ensure that no water will accumulate or damage the floor. It is best to open the tub cover when draining to ensure air circulation and speed up the drainage.

● Vacuum residual water: Even if the drain valve has drained most of the water, a small amount of water may still remain in the pipes and pump. To completely drain it, you can use a wet-dry vacuum cleaner to vacuum any residual water in the pipes and nozzles. Make sure that each nozzle and filter area is completely vacuumed to prevent any residual water from freezing in cold weather.


2.3 Clean the spa hot tub

After draining the water, the next step is to clean the tub. The cleaning process helps remove scale, mineral deposits, and other dirt that can accumulate and damage the equipment during the winter.


● Clean the inner wall and filter: Use a non-abrasive cleaner to clean the inner wall of the tub, paying special attention to the nozzles and seams to ensure that there is no residual dirt. For the filter, it also needs to be thoroughly cleaned, and you may even consider replacing the filter with a new one when you reuse the tub to ensure clean water quality.

● Remove scale and minerals: If there is scale or mineral deposits in the tub, you can use a special descaling cleaner to clean it. Make sure there is no residue in the tub and pipes, which can reduce maintenance work when you use it again next year.


2.4 Protect the pipes and pumps

After emptying and cleaning, the pipes and pumps of the spa hot tub need to be protected.


● Use antifreeze: In order to prevent the trace moisture that may remain in the pipes from freezing, RV antifreeze can be added to the pipes and pumps. This antifreeze can effectively protect the pipes from freezing. Pour the antifreeze into each nozzle, pipe and pump port to ensure that all pipes are protected. Remember that the antifreeze should be a product that is safe for plastics and rubber to avoid damage to the equipment.


2.5 Cover the spa hot tub

After all the internal work is completed, the last step is to cover the tub cover and ensure its tightness. A high-quality spa hot tub cover can effectively prevent cold air and moisture from entering the tub and protect the tub from the cold weather.


● Check the tightness of the cover: Carefully check the sealing strip of the tub cover to ensure that there are no damage or cracks. If the cover shows signs of aging or deformation, it is recommended to replace it with a new cover. A well-sealed cover can significantly reduce heat loss and also prevent debris such as leaves and dust from entering the tub.

● Use windproof fixing straps: There are many strong winds in winter, especially in some windy areas, and the spa hot tub cover may be blown up by strong winds. To avoid this, you can use windproof fixing straps to firmly fix the cover on the tub to ensure that the cover will not move even in strong winds.

hot tub

Does the outdoor spa hot tub need maintenance after being enclosed?

Although the outdoor spa hot tub can be unused throughout the winter after being enclosed, it still needs regular inspection and maintenance to ensure that there are no problems.


3.1 Check the lid and seal regularly

At regular intervals, check the lid of your spa hot tub to see if it is secure and if there is any moisture or snow accumulated on the lid. If the lid is damaged or the seal is not good, cold air and moisture may enter the tub and damage the device.


3.2 Clear snow and ice

If your area has heavy snowfall or frost in winter, it is recommended to clear snow and ice in time to avoid excessive snow from crushing the tub lid. In addition, moisture from melted snow may seep into the tub and damage the device.


HuanTong’s Lovia Spa products are known worldwide for their luxurious features, reliable quality, and affordable factory pricing. With more than 30 years of manufacturing experience, we support your business goals through flexible purchasing options and wholesale discounts. Whether you want a standard hot tub or a customized smart spa solution, we can deliver. Buy directly from our Guangzhou factory and take advantage of our expert support and bulk pricing strategies.

Get the latest price? We will reply as soon as possible (within 12 hours)