Abstract

A drain insert is provided for insertion in a drain beneath a drain grate (10) to prevent ingress of material, comprising: an elastomeric valve (16) disposed between the drain grate (10) and the drain that is closed in the absence of draining liquid and opens due to its presence; and a reservoir (13) that fills and overflows with the draining liquid passing through a drain path outlet (24) that is below an upper level (21) of the reservoir.

IPC Classes  ?

• E03C 1/294 - Odour seals with provisions against loss of water lock
• E03F 5/042 - Arrangements of means against overflow of water, backing-up from the drain
• F16K 15/14 - Check valves with flexible valve members