On Thursday, 29 October 2020 at 14:15:14 UTC, Roland Perry wrote:
Struggling to find the keywords to guide me to buy online those plumbing
gadgets which clamp on the outside of, and pierce through, existing
pipework to attach a dishwasher feed or something similar.
--
Roland Perry
Forget it - turn the water off while you work and use a compression tee type washmac valve. Clean the pipe well before fitting.