Electrical heater for warming the back, bottom, head and neck and arm-rest surfaces of showers and bathtubs, namely, soaker tubs, hydro-tubs, air massage tubs, and walk-in tubs, installed on the surface or imbedded in the body of the tub

PREINSULATED TUBING BUNDLE-NAMELY, PROCESS LINE, THERMAL INSULATION, AND JACKET FOR USE IN STEAM SUPPLY, CONDENSATE RETURN AND PERSONNEL PROTECTION