MDPE or medium density polyethylene is a reliable and highly versatile material that has proven itself across a wide range of plumbing products providing a stable and economical platform for domestic and commercial installations. We have a wide array of medium density polyethene fittings to suit your latest hot or cold plumbing project, no matter the scope or scale. Taking you from parts list to job. Hand tight only. Captive O ring seal. Lifetime protection. WRAS approved. Withstands up to 16 bar. Variety of applications. Used for connecting water mains pipes and any water supply pipes. Size 20mm. Weight: 0.1543235834 pounds. Manufacturer: B2C.