GRH was called upon by one of our main clients to replace some existing CWDS isolation valves that were letting by delaying maintenance of the existing hot water calorifiers.
The existing 100 & 80mm gate valves were replaced with fully lugged butterfly valves and new brazed spools to make up the difference in size.
These works were completed by means of a pipe freeze to the 100mm copper CWDS during normal hours.
The new 100&80mm copper brazed spools were fabricated off-site as no hot works were allowed on this particular site.
All works were completed on schedule.