A flushing shield is a device that is used to clean drains or sewers by increasing the flow velocity of the flushing water through the narrowing of the sewer cross section [[EN14654-1:2005]].

The process involves installing, into the sewer pipe, a flushing shield device that is fitted to the sewer cross section. The shield is equipped with one or more small diameter pipes which are used to channel and focus the backed up sewer water for flushing purposes. Another form of a flushing shield is the so called "cleaning vessel".

Image: 

Flushing shield [FI-Müller]

 

FI-Müller

Firmeninformation Müller Umwelttechnik GmbH & Co. KG, Schieder-Schwalenberg

EN14654-1:2005

DIN EN 14654: Management und Überwachung von Reinigungsmaßnahmen in Abwasserkanälen und ‑leitungen – Teil 1: Reinigung von Kanälen, Beuth-Verlag, Berlin (12.2005).

Image: 

Flushing shield [Source: STEIN Ingenieure GmbH]

Image: 

Flushing shield [Source: STEIN Ingenieure GmbH]