Hot Tub Construction, Process and History
Hydrotherapy is used for soothing muscles, detoxifying the body and relaxing the mind. Starting in the 4th century hot stones were placed directly in the water as the primary heat source. Ofuro or soaking tubs started in Japan around in the late 730s. These soaking tubs were part of inns (ryokan) offering beds, food, and drink. The fall of the Roman Empire lead to the abandonment of traditional bathing practices. In the 13th century baths became popular again. Instead of rocks Jacuzzis, spas, and hot tubs utilized more modern plumbing systems.
Components to a hot tub include temperature keypads, a filtering system, heating system, delivery system, and a drain. Hot tubs use keypads or turners to control the heat. Hot tubs should contain safety mechanisms that ensure temperatures stay below 104°F. Filtration systems in pools and aquariums is very important. Hot Tubs use a suction filtration system, or a pressure filtration system. The suction filter pulls water through a pump and removes particles. A pressure filter uses a cartridge to filter the water.
A heating element is added to keep the hot tub warm. Inside of the heater is a flow switch, and over-heat switch. These monitor the pressure of the water as it moves through the pumps and plumbing lines to keep the hot tub running. The plumbing lines are made of plastic PVC. The jets are adjustable and makes the water stream into a series of projections by water pressure. The drain has several options. These are similar to sinks, bathtubs, and drinking fountains. Lights are also attached to the tubs so seeing at night is an option.