The McAlpine STW19-TUBE is a dip tube designed for use with McAlpine STW 1½" shower traps. It is made from white plastic and is inserted into the trap body to create a water seal, preventing foul odors and gases from entering the bathroom. This dip tube is easy to install, remove for cleaning, and is a cost-effective solution for preventing unpleasant odors, especially in bathrooms not used regularly. It provides an additional layer of protection against unpleasant odors and gases for McAlpine STW 1½" shower traps. Available for 19mm, 50mm, and 80mm Shower Traps. Suitable for use with the STW range of 1½" Shower Traps. A full range of spare parts and accessories are available.