The best water chiller and pump for a cold plunge depends on tub capacity and whether you need a complete cooling system or only a circulation component. The EONIX 1/2 HP chiller is suited to larger tubs, while its 1/3 HP model and the AS ColdPlunge unit are options for setups up to about 79 gallons. For an existing system, consider the ICYBULL pump or BAOSHISHAN accessory kit, checking connection sizes before buying.
| Product | Best for | Key detail |
|---|---|---|
| EONIX 1/2 HP Chiller | Larger plunge tubs | Recommended for 79–105 gallons |
| EONIX 1/3 HP Chiller | Cold plunges up to 79 gallons | Integrated pump and reusable filter |
| AS ColdPlunge 1/3 HP Chiller | Plunge tubs or home bathtubs | Includes a submersible pump |
| ICYBULL 720 GPH Pump | Adding circulation to a system | Speed control and multiple modes |
| BAOSHISHAN Accessories Kit | Compatible BAOSHISHAN setups | Includes pump, filter, connectors, and hose |
EONIX 1/2 HP Cold Plunge Chiller
Best for: Buyers with a larger cold plunge tub who want a chiller, pump, and filtration in one system. Its 1/2 HP compressor is recommended for 79–105-gallon containers, with a stated maximum limit of 132 gallons. The integrated pump circulates water through a filter that can be rinsed weekly rather than replaced.
The LED touch screen and remote control provide two ways to set and manage the temperature. Choose this model over a 1/3 HP unit when tub volume is the deciding factor. The listing does not specify cooling performance for every ambient temperature or setup, so results may vary with conditions and insulation.
EONIX 1/3 HP Cold Plunge Chiller
Best for: Cold plunge owners with tubs up to 79 gallons who want an integrated pump and reusable filter. The listed system is designed to cool water to 42°F and maintain the selected temperature within a stated 1°F variance. Its 1/3 HP compressor is a smaller-capacity option than the EONIX 1/2 HP model.
The reusable fine-mesh filter is intended to catch debris and can be cleaned rather than replaced with disposable cartridges. The product listing describes a universal connection system, but buyers should still verify hose and port fit with their tub. Avoid choosing it for a tub above the stated 79-gallon capacity.
AS ColdPlunge 1/3 HP Chiller
Best for: Buyers who want to use a cold plunge tub or a standard bathtub. This 1/3 HP unit is designed to cool water to 42°F and includes a built-in circulation pump and washable metal mesh filter. For a bathtub, the included submersible pump helps move water through the system.
It is a practical choice when flexibility across different home locations matters, including a bathroom, garage, or patio. The listed connection size is 1/2-inch inlet and outlet ports for cold plunge tubs, so confirm that your tub’s connections match. The product information does not provide a gallon-capacity recommendation.
ICYBULL 720 GPH Water Pump
Best for: Cold plunge owners who already have a chiller and need a separate circulation pump. The pump is rated at 720 gallons per hour and offers Boost Cool and River Mode settings, plus a speed controller. Its quiet-operation design may suit a home recovery area where pump noise is a concern.
Choose this if you want adjustable flow modes rather than an all-in-one chiller. It has 3/4-inch barbed connections, which may not match every hose or chiller port. Check your system’s fittings and plumbing requirements before selecting it; the listed information does not include a chiller or filter.
BAOSHISHAN Ice Bath Accessories Kit
Best for: Owners of compatible BAOSHISHAN chiller and tub systems who need several circulation components together. The kit includes a 50W pump rated at 317 GPH, a filter, four 1/2-inch-to-0.71-inch connectors, an adapter, and silicone hose. The filter is intended to catch debris and help prevent clogs.
Choose this kit when its listed components and compatibility match your setup. The manufacturer specifies integration with its 300L and 500L aquarium chillers and inflatable cold plunge tub. That limited compatibility is an important caution: do not assume the connectors and hose fit unrelated systems.
Buying Guide: How To Choose A Water Chiller And Pump
What capacity should the chiller handle?
Start with the filled water volume of your tub. Match it to the chiller’s stated capacity rather than choosing by horsepower alone. In this selection, the EONIX 1/3 HP models are described for up to 79 gallons, while the 1/2 HP model is recommended for 79–105 gallons, with a stated maximum of 132 gallons. Capacity and cooling results can also depend on conditions such as ambient temperature and tub insulation.
Should you buy an all-in-one unit or a separate pump?
An all-in-one chiller is a simpler option when you need cooling, circulation, and filtration together. A standalone pump is more appropriate when you already own a chiller and need to add or replace water circulation. Before buying a separate pump, compare its flow rating and fitting size with the requirements of your system.
Which connections and maintenance details matter?
Check inlet and outlet sizes, hose diameter, and whether the product includes the pump or hose you need. A washable filter can reduce the need for disposable replacements, but it still needs routine cleaning. Confirm that a kit’s stated compatibility includes your exact chiller or tub rather than relying on a similar-looking connection.
Frequently Asked Questions
Can a water chiller work without a pump?
Water must circulate through a chiller system for cooling to reach the tub. Some products include a pump; others, such as the ICYBULL, are separate pumps. Check the chiller’s included components and installation requirements.
Is a 1/2 HP chiller better than a 1/3 HP model?
It is the better fit when the tub volume requires the larger stated capacity. A 1/3 HP unit may suit a smaller plunge, while a 1/2 HP unit is recommended for larger containers. Match the model to the water volume and manufacturer guidance.
Does a cold plunge chiller include a filter?
Some do. The EONIX and AS ColdPlunge models listed here include filtration, while a standalone pump listing does not describe a filter as included.
Will any pump fit any cold plunge chiller?
No. Pumps and chillers can use different connection sizes and hose arrangements. Compare the listed fittings with your system before purchasing.