The EUROSTANDARD electrofusion tapping saddles with valve are manufactured in polyethylene PE100 injection molded. They are operating as a valve thanks to the presence in the internal part of a brass thread body supplied with gaskets suitably positioned. The cutter, integrally made in brass, can also serve as closing tightening element. They are suitable for pipelines for the distribution of gas and water. Boring under working with network pressures up to 10 bar for gas and 16 bar for water.