New Everton Stadium - Hill Dickinson Stadium

What i don't understand and would love to learn is how was there just so much water. Surely a breach in the roof would not cause it, and if it's drains why would it come from a covered up area at the back of a large stand? I can understand a leak on a new roof but not of that magnitude🤔
It's the siphonic drainage. It's designed to carry huge volumes of water and is used on pretty much all large commercial roof areas to limit the number of downpipes.

Problem being that if there is ever a failure of the system, like this for whatever reason, those huge volumes of water can cause quite severe flooding.
 
It's the siphonic drainage. It's designed to carry large volumes of water and is used on pretty much all large commercial roof areas to limit the number of downpipes.

Problem being that if there is ever a failure of the system, like this for whatever reason, those huge volumes of water can cause quite severe flooding.
Thanks mate👍 Just looking at diagrams of it now, seems air locks can be an issue. Clever system when working though.
 
Siphonic drainage...apparently: Most common cause of operational problems and system failures is blockages in pipework and gutters - can be avoided with a regular maintenance program. Incorrect installation resulting in air being trapped in the system.
 

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