ASME A112.19.7 pdf download Hydromassage bathtub systems 4.12 Suction fitting cover apertures Suction fitting cover apertures shall not allow the passage of a 7.87 mm (0.31 in) circular rod with an applied force of 22 N (5 lbf). 5 Testing 5.1 Installation Hydromassage bathtub systems shall be installed in accordance with the manufacturer’s instructions. When installation tolerances are specified, the...