DIY Whirlpool Tub Installation: Transform Your Bathroom
Introduction
Whirlpools are available that fit into a standard tub space and install almost as easily as a regular tub. Learn how to tear out the old tub, tub walls and faucet; rough in new plumbing; and set the new whirlpool in place.The first step in drop-in whirlpool tub installation is deciding how much of the bathroom to demolish. The existing tub was a standard 30- by 60-inches. Whirlpools that size are available, but we decided to replace it with a slightly roomier, 32- by 60-inch model.
We recommend you add this extra two inches if you have the space. It’ll complicate the project a bit; you’ll need to shift the drain about one inch, and the tub edge may have to sit on top of the existing flooring. But you’ll enjoy the extra width when you’re soaking in the tub.
After forming your plan, call your local building department to see which permits you’ll need (electrical, for one) and learn about any special local rules regarding whirlpools. Some inspectors require separate wall access for servicing the motor and pump, depending on the model you buy.
Buying a whirlpool
Whirlpool tubs come in lots of shapes and sizes, made by a number of national and regional manufacturers. We chose a model with an integral tiling flange that fits into a standard five-foot space. If you have more room, install a drop-in model— a whirlpool bathtub meant to sit on top of a tiled deck.
Check with your local distributors for model and installation instructions. Some tubs designed to fit a standard five-foot space feature add-on flanges. Avoid these if you can — the flanges won’t be as watertight as the integral ones.
In this article, we’re installing an American Standard whirlpool tub. Other manufacturers have somewhat different tub designs and installation techniques. Be sure to check the specific instructions included with the tub you buy.
Figure A: Electrical Plan
You’ll need at least one dedicated 15-amp GFCI circuit, two if you install an optional heater. In our bath, we installed two “blank front” GFCIs in the linen closet so we could test the circuits without opening the tub access, then ran two separate 14-2 cables to outlets at the pump and heater locations.
You also need to run a solid No. 8 copper ground wire from the motor to all metal associated with the tub. Check with your electrician or inspector for wiring details. Follow the manufacturer’s recommendations for the placement of the electrical outlet.
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