I've come across a few of these HOP access covers on the streets of Glasgow recently, and I've been struggling to find out what they were for.

My best guess is that they're part of an old hydraulic system which supplied high pressure (HP?) water for running lifts, presses and other machinery.

Cont./

#glasgow #glasgowhistory #industrialhistory #accesscovers #manholecovers #pastglasgow #streetfurniture