The Hot Tub AquaFill
The “Hot Tub AquaFill” is designed for use with above-ground portable spas, and like fountains, they require manual filling. The greatest drawback to filling your hot tub with a garden hose is the frequency of overflows and flooding associated with getting preoccupied with other tasks and forgetting to turn off the hose. “Water damage and homeowner policies can be a volatile issue in many says Don Griffin of the National Association of Independent Insurers, a trade association for property-casualty insurers. Swimming pool, spa and hot tub overflow is one of the top ten causes for home water damage claims with many insurance companies. Chief among the cause of overflowed pools, spas and hot tubs is forgetting to turn off the hose when filling, or malfunctioning mechanical float control systems. These are nothing more than common toilet tank floats (Fluidmaster) which often malfunction and will not shut off as they were designed to, resulting in an overflow and possible lawsuits from neighbors. If you wonder why mechanical float valves are so undependable, you may get an idea by logging onto the Fluidmaster.com website and read the list of 15 problems to trouble-shoot! The AquaFill has no troubleshooting list. It was designed to turn on and off one million times. The AquaFill float sensor is used in the canning and bottling industry and has a failure rate of only .001 per 1000! The AquaFill’s sensor switch is designed to handle a continuous voltage of 120v.; the pool Aquafill uses only 6 volts and the pond and fountain AquaFill only 24 volts. The Hot Tub AquaFill installs in approximately one hour and fits easily in any hot tub equipment space. Once installed, you will never have to fill your hot tub by hand again.
The water level in the hot tub flows into the AquaFill assembly and into the float chamber where the water level equalizes. The assembly can be telescoped up and down for the purpose of adjusting the water level in the hot tub. The solenoid valve is plumbed into either a return line or supply line for adding water to the hot tub as needed.
The water supply to the solenoid can be as small as 3/8 ths inch plastic or copper tubing, making it easy to hide in a variety of ways. The tubing can even be run in the jointed of tile on a patio. The hot tub kit comes with the AquaFill assembly, 24 volt transformer, solenoid valve (back flow preventer) and lock nut with rubber gasket seal. In the basic hot tub installation, a hole is drilled through the shell 5 to 6 inches below the desired water level. The threaded male adapter is then inserted through the hole and the rubber washer and rounded washer is tightened down to hold the assembly in place. Once installed, the assembly can then be telescoped up or down to establish the desired water level. In most cases, it will be necessary to have an electrician wire a 110 volt AC plug in the equipment compartment for the 24 volt transformer to plug into to supply the power for the Aquafill switch to operate the solenoid valve. The solenoid valve (w/back flow preventer) can be plumbed into the supply or return lines.