Planning Guide for a Hot Tub Installation

Laying the Foundation

Hot tubs need a proper foundation in order to prevent settling. Hot tubs can either be installed into a wood deck system or a concrete foundation, which needs to be at least 4 inches thick. The foundation needs to be completely straight and level, and must be strong enough to support the weight of the hot tub, water and people in it. Hot Tub Guide recommends installing the hot tub on an elevated foundation to encourage proper drainage. If you laid a concrete foundation, it will need to cure for at least four days before assembling the hot tub on it.

The complexity of wiring your hot tub depends on which product you choose. If you need to install a spa panel, for example, you should consult with a contractor if you don't have any previous experience with electrical wiring. Installing a spa panel involves mounting a panel on the side of your house and running an underground conduit to power your hot tub. As noted by the Home Depot, you should have your work inspected by a certified electrical inspector before filling and using your hot tub. The International Association of Electrical Inspectors provides a helpful online locator if you need to find someone in your area. Also, check with your local city government about any inspections it requires.

Exact instructions for hot tub assembly vary by manufacturer; however, regardless of the model you have, make sure that you don't block access to your hot tub control panel. As noted in "The Ultimate Guide to Spas and Hot Tubs," by pool and spa expert Terry Tamminen, you can pre-plumb your hot tub before installing it if you don't have a lot of space between your hot tub and other surfaces, such as a deck wall. Typical plumbing tasks include installing jets, floor drains and air blower rings. Consult a professional if you do not have previous plumbing experience.

If you've chosen to install your hot tub inside your home, you might need to install a ventilation system to prevent moisture buildup and related problems. Ozonators and ionizers are helpful for both indoor and outdoor hot tubs, and help reduce the amount of chemicals you will need for maintenance. Both products are also easy to install. As you fill your tub, monitor all jets and connections for leaks, and double-check all connections before you turn on the power for the first time.