Roland Perry Wrote in message:
In message , at 11:46:26 on Fri, 30 Oct 2020, thescullster remarked:Roland Perry Wrote in message: 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 PerryIf you are fitting a drain valve to empty the whole system, then this should be one that allows good flow.That way there's a chance the water velocity will carry crud with it .The "pipe cutter" types will not do this for you.I'm using the pipe-cutter valve to empty the system, so that I can put a more conventional bleed-valve elsewhere.-- Roland Perry

As has been mentioned the "proper" one that you fit should be at
the lowest point on the system so that you can empty ground floor
mains if necessary.

Phil
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