On 2020-10-29, Andy Burns wrote:

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.

https://www.wickes.co.uk/Self-Cutting-Washing-Machine-Tap/p/420510

How well do those work? Tqhey always struck me as risking a bad seal
or loose bits of pipe inside the pipe.