1240mm Tideflex TF-1 In Dun Laoghaire Coal Harbour

The most practical solution.

The coal harbour at Dun Laoghaire dates from the 18th Century and the outfall of the culverted watercourse seemed a simple solution. However, the outfall was constantly experiencing blockages due to sand and rocks being swept into the outfall chamber. A Tideflex duckbill valve was proposed by MeasurIT as the most practical solution and this has been working without incident since 2006.

Project details

Client: Dun Laoghaire-Rathdown County Council
Design Details: 1240mm Tideflex TF-1 valve with thimble plate in angled headwall

Odoo CMS - a big picture


The original chamber exits were both sealed off with metal plates and the Tideflex duckbill valve provides the only drainage point now. As the line pressure builds up in the upstream system, the valve opens and discharges, even when submerged. Due to its rubber duckbill design, the Tideflex valve is more than able to handle both the wave action and the debris of the sea.

Odoo - Sample 1 for three columns

Old outfall from chamber in sea wall.  

Odoo - Sample 2 for three columns

2No. exits from old outfall chamber.  

Odoo - Sample 1 for three columns

Tideflex non-return valve at low tide.  

Odoo - Sample 2 for three columns

Tideflex check valve being submerged as the tide rises.