Водоснабжение и учётKessel#Kessel#Staufix#Water systems#Components for plumbing and drainage systems#Valves, sluices, sluice gates for systems
STAUFIX Kessel - Двойной обратный клапан
The backwater valve for wastewater without sewage is equipped with two mechanical flaps which close automatically in the event of backwater. One flap serves at the same time as an emergency closure to be closed by hand.
Further info from manufacturer on STAUFIX Kessel
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