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This parts list corresponds to the overview video of my DIY Cold Plunge that you can view here:

 

Cooler and Accessories

Frozin 400 Cold Plunge Tub. High-efficiency Foam Insulation for Superior Ice Retention over Uninsulated Barrel or Inflatable Ice Baths. 100 Gallon Frozen Capacity.
There are a variety of cooler options you can use as the base for your plunge, but this Frozin is interesting in that it has ports already included so you don't have to drill and install bulkheads. I haven't personally tried this as I used a Grizzly 400, which has now been replaced by the Grizzly 450. Some also use insulated shipping containers or even farm animal feed troughs. The key is buying something insulated or adding insulation to reduce the power needs of your chiller.
Sale
Active Aqua Water Chiller Hydroponics System, Indoor Cooling Mini Unit, 1/4 HP
The chiller keeps your water cold, and like many people I used this Active Aqua unit. The 1/4 HP model works well with the insulated coolers, and can go from ambient to 46F in about 48 hours. Be sure to get the right fittings (I link some below) as the unit has British Pipe Threads rather than the US-standard NPT threads.
Utoplike (32"x18") Teak Wood Bath Mat, Shower Mat for Bathroom, Wooden Floor Mat Square Large for Spa Home or Outdoor
I really like this teak platform as a spot to drip dry a little after getting out of the plunge.
EcoDecors, 18 inch, Natural, Teak Shower Bench, Teak Shower Stool, Teak Bench Shower, Teak Shower Seat, Teak Shower Chair, Teak Stool, Shower Benches Teak
This chair was easy to assemble, relatively cheap, and sturdy. I have it next to the plunge and keep my robe/towel there, and will sit to take my flippy floppies on and off.
2pcs Heavy Duty Stainless Steel Slop Basket Filter Trap, 2.75" Top / 1" Mesh Metal Sink Strainer,Perfect for Kitchen Sink/Bathroom Bathtub Wash Basin Floor Drain Balcony Drain Hole,Utility…
  • Outside diameter 7cm(2.75") x H 3cm(1.1"),Inside diameter : 2.5cm-3cm(1"-1.1"). Good bathroom drain hair catcher
  • Awesome kitchen and sink item. Simple and small design. Allows to be cleaned easily without hassles
  • Stainless Steel Sink Strainer, Perfect for Kitchen Sink Bathroom RV Bathtub Wash basin Floor drain balcony Drain Hole,Utility
  • 2.75” Top diameter, Also comes with metal flat rim to fit over sink's drain, At the same time can intercept hair, food bits, debris.long lasting protection against drainage clogging. Great for American families’ small kitchen and bat

Filtration

Danner Manufacturing, Inc., Supreme Aqua-Mag 1200 GPH Magnetic Drive Water Pumps for Aquarium, 02712
The tried and true pump, which makes the water move through your filter and chiller. note that most chillers, including the recommended Active Aqua, do NOT have a built-in pump so this is required even without a filter.
Sale
1 Micron 2.5" x 10" Whole House CTO Carbon Water Filter Cartridge Replacement for Countertop System, Dupont WFPFC8002, WFPFC9001, FXWTC, SCWH-5, WHEF-WHWC, WHCF-WHWC, AMZN-SCWH-5, 4Pack
Filters go in the filter housing, and clean up your water. I chose these since they have activated carbon which should keep the water a bit more clear. If you're going to use chemical filtration you may want a different filter since I believe the carbon will remove some of your chemicals.
Pvdf Venturi Injector 3/4” Inch Gas-Liquid Mixing Venturi Injection for Ozone Generator
I use ozone for additional filtration, and if you're going to follow suit, you either need a bubbler (like an acquarium) or a venturi like this to mix the ozone into your water. If you use this particular venturi, use about 3X the amount of teflon tape you think you'll need on the pipe threads, as my venturi was a leaker!
Elecpluway 100mg/h Spa Ozone Generator, 50/60Hz Mini Cold Plunge Ozone Generator, SPA-124 Hot Tub Ozonator
The ozone generator create ozone, which is sucked into the water from the venturi. Ozone is a harsh oxidizer (and bad for your lungs!) so don't breathe it in. I set my generator to run for about 45 minutes in the dead of night, and the ozone disolves into oxygen a couple hours later.

Lighting and Automation

Sale
Kasa Smart Plug Power Strip HS300, Surge Protector with 6 Individually Controlled Smart Outlets and 3 USB Ports, Works with Alexa & Google Home, No Hub Required , White
This power strip (plugged into a GFCI outlet since water and electricity don't mix) let's you power individual outlets on and off, and monitors power consumption. You can use it with the branded mobile app, or connect to various home automation systems, in my case, Home Assistant.
BTF-LIGHTING IP68 Waterproof Outdoor WS2815(Upgraded WS2812B) RGB LED Strip Individually Addressable 5050SMD Dual Signal DC12V 16.4ft 300Pixel Can Work Under Water White PCB(No Adapter or Controller)
These serve no legitimate purpose beyond adding some bling to your plunge. You can adjust color and brightness, and depending on your controller, do cool patterns and other nonsense. These lights will work with the extension cable, power supply, and controller below.
GLEDOPTO ESP32 WLED LED Strip Controller Dynamic RGB IC IO33 DIY Port App Control Easy Wiring Terminal for WS2811 WS2812 SK6812 TM1814 WS2813 WS2815 FCOB Addressable Strip Light
Light strips need a controller to set their color, brightness, etc., and this one is based on the open source WLED project. It's easy to connect to the WLED app, or an automation system like Home Assistant. For the 4 conductor light strip I used, just connect both data lines to the D terminal.
BTF-LIGHTING AC100-240V to DC12V3A Max 36W Suit DC12V2A DC12V1A Device Power Supply Adapter Converter with 5.5x2.1mm DC Output Jack for WS2815 WS2811 5050 3528 5630 FOB COB etc LED Strip Module Light
This power supply turns 120V AC into 12V DC to power the controller and your light strip. If you're worried about zapping yourself, 12VDC is much safer than AC in this submerged application.
BTF-LIGHTING 9.84FT 4 Pin 0.5mm²/20AWG IP68 Extension Cable Wire with Male and Female Connectors for RGB 5050 WS2815 WS2805 etc LED Strip 15mm Metal nut Small Size Home Lighting Connector
If you need an extension cable, this one is rated to IP68 for submersion, compatible with the above lights, and flexible enough to just sit between the gasket in the Grizzly lid.
Double Sided Tape Heavy Duty, Waterproof Mounting Foam Tape, 33ft Length, 0.4in Width, Strong Adhesive Tape for LED Strip Lights, Automotive, Home, Office Decor, Outdoor, Made of 3M VHB Tape
I used Flex Seal adhesive to mount my lights, but it wasn't great. I'll likely replace with VHB tape, which is very effective, and rated for submerged use.

Plumbing and Miscellaneous

Here are the plumbing fittings I used and a source for them. I don’t have any affiliation with these vendors aside from having ordered from them for my plunge.

Part Notes Source Link
Grizzly Drain Plug If you use a Grizzly cooler, this allows you to replace the lower drain cap with a threaded connection Grizzly https://grizzlycoolers.com/products/grizzly-torrent-twist-plug-with-hose-connection
Bulkhead Creates another threaded connection in your cooler (assuming you’re not using the above cooler with threaded holes). Requires a 1 5/8″ hole saw. McMaster Carr https://www.mcmaster.com/36895K122/
FlexPVC Pipe Pick your favorite color in the 3/4″ size. I ordered 15′ and had about 5′ left over. Note that the FlexPVC website is terrible, and shipping is slow, but the product is solid. FlexPVC https://flexpvc.com/cart/agora.cgi?p=Flex_PVC_By_The_Foot_CLEAR&p_id=813-007&xm=on&ppinc=detail
Chiller Connection The Active Aqua chiller has funky British pipe threads. I’ve heard of people using standard NPT connectors with lots of pipe dope and force, but this has the correct threads. You’ll need a reducer bushing (below) to connect to your 3/4 FlexPVC McMaster-Carr https://www.mcmaster.com/4654N24/
Chiller Connection Bushing Turns the 1 1/4″ socket connection in the above fitting into a 3/4″ socket that will accept your 3/4″ FlexPVC McMaster-Carr https://www.mcmaster.com/4880K317/
Hose Connection (Optional) Lets you screw a garden hose onto the water outlet in the cooler for easy draining FlexPVC https://flexpvc.com/cart/agora.cgi?p=GardenHose-Male&p_id=16-010&xm=on&ppinc=detail
Unions These slip onto FlexPVC or standard PVC pipe and let you disconnect by unscrewing. This is helpful for servicing and moving the equipment and you can see where I used them in my video. I’d grab 8-10 since you may make a mistake or two. FlexPVC

https://flexpvc.com/cart/agora.cgi?p=PVC-Fittings-Unions-China&p_id=1207GS&xm=on&ppinc=detail

Grab a couple threaded unions as well to connect to the Danner pump (1 each):

https://flexpvc.com/cart/agora.cgi?p=PVC-Fittings-Unions-China&p_id=1207GT&xm=on&ppinc=detailhttps://flexpvc.com/cart/agora.cgi?p=PVC-Fittings-Female-Adapter-Spigot&p_id=478-007&xm=on&ppinc=detail

 

Misc. Fittings Be ready to make a couple trips to your nearest big box store Blowes/Home Cheapo

4 x 3/4″ Elbows for filter

2 x 1″ Male MPT to 3/4″ Slip for filter

2 x 3/4 T for filter

1 section 3/4″ PVC (I used about 3′)

 

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