Jim Clark made a welcome return after his health wobble late last year, everyone was pleased to see him and of course his plumbing skills were soon put to good use.
Above shows close up of the 6 inch valve furthest away in blue and connections to the plastic piping.
Maybe a way of merging these photos but beyond me!
Anyway Jim does the honours in opening the value with Stuart looking on nervously!
I think there was shuttering mentioned to pour in concrete, encasing the metal parts?
Thanks to John Wood for the photos and information.