The Mechanism and Components
The system acts as a portable filtration and heating unit that turns a standard bathtub into a regulated hot tub. The required components include:
Hoses: One hose is placed in the tub to pull water out (usually from the chest area), and another hose returns the heated water to the tub (usually at the feet)
Filter: A sand filter (such as a Hayward sand filter) or a coconut charcoal canister filter is necessary
Crucially, the filter must be placed before the heater in the sequence to prevent dead skin cells from clogging the heating element
Pump: A small pump, approximately 1/4 horsepower, is used to circulate the water
Heater: A stand-alone instant heater (also called an "on-demand" or tankless heater) is used to heat the water as it passes through
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Thermostat: The system requires a thermostat to control the heater, allowing it to shut off or turn on to maintain a steady temperature (ideally between 105°F, and 110°F)
Bathtub → Filter → Pump → Heater → Bathtub
**Anyway I can set this up in my apartment bathroom properly assuming I have room for it?**
like the other guy said maybe just buy a tub that has these features already. better and cheaper yet there are undoubtedly devices, even just a hotplate, that can heat stones for you to drop into the bath with you and periodically switch out.