Polyethylene screw connections are compatible with valid international standards and are used for pipe connections up to a pressure of 16 atmospheres. Polyethylene screw connections are produced in different shapes and sizes, including PE100 and PE80 types of conversion, elbow, tee, cap and connector. The application of polyethylene screw connections is used for water distribution network and water supply system and agriculture. Installation of these connections is without the need for a special welding machine, and even if damage occurs, it can be replaced precisely and conveniently.