Water pipe insert with reflux check valve fitted into water channel and bypass with excess pressure valve to guide water past check valve

摘要

The pipe insert (1) has a water channel (2) with fitted reflux check valve (3). It also has a bypass (14) with excess pressure valve (16,17) to guide water past the check valve. The excess pressure valve is a one-way valve with flow direction opposite to that of the check valve. The bypass is a ring channel co-axially around the check valve and opening into the water channel in front and behind it. The valve is formed by a channel aperture (16) and a hose-like sealing element (17) of elastomer material covering it.