Manufactured from polypropylene, this tundish adaptor kit by Wavin is designed to prevent unpleasant odours escaping from the sink waste. It is used to prevent foul smells entering the building when connecting a tundish from the safety discharge on an unvented hot water cylinder with a combined temperature and pressure relief valve, when connected to a soil stack. This HepVO valve is a hygienic, self-sealing valve designed to prohibit the escape of foul sewage smells into the air. It is for use with an unvented hot water storage system to connect a tundish outlet to a drainage stack and prevents foul sewer air from entering a building. The kit comprises a 32mm HepVO valve and tundish adapter. The total length of the valve with the tundish installed is 320mm. This plumbing tool comes in a white finish to complement bathroom appliances.