77 Ill. Adm. Code 890.750
Hydromassage/Whirlpool Bathtubs
Section 890
Section 890.750 Hydromassage/Whirlpool
Bathtubs
a) Whirlpool bathtubs shall be installed so that the tub, pump,
jets and pump tubing drain completely after each use. The pump shall be
located above the weir of the whirlpool tub trap.
b) All whirlpool bathtubs shall comply with ASME A112.19.7/CSA
45.10 (Whirlpool Bathtub Appliances). The suction fittings used in whirlpool
bathtubs shall conform to ANSI/APSP 16 (Standard Suction Fittings for Use in
Swimming Pools, Wading Pools, Spas, and Hot Tubs).