Another issue!!

Hello Friends

So this morning I had a ds cloakroom basin tap change. Ok. I can do that.

Got to house, in cloakroom no ballofix. Looked in airing cupboard hwsc, no gate valves, ok look in loft, loads of gate valves from cwsc, everything must be tank fed, nothing labelled but ok I'll turn the all off. One wouldn't budge the others turned.

Back downstairs, test taps, still running a bit, up in loft again, won't turn off any further. Back down stairs, decision time. Ok, I'll do it. Got everything around me.

Cold tap off, finger over end of pipe, all ok, bit fiddly to get new tap backnut on but did it & connected up. All ok. Little bit wet.

Hot, undid backnut as much as possible & undid tap connector, water running, then red hot, burning, ffs, couldn't get tap back but on, hot water & room flooding now, it's ok as downstairs with Lino, mop by my side.

Eventually got it on & connected. No leaks. Customers happy.

Now they want new kitchen tap fitted but again no ISO & I can't do it like I did as I got soaked, the room was soaked & it was scorching hot water.

So, custards are happy to fit ballofix all over house & change all the gate valves in the loft that come off the cwsc.

Now, my confidence is flagging as I write this.

Can anyone confirm what I'm thinking please?

Drain down & change gate valves then fit ballofix on other pipes for future, refill, change kitchen tap & test other outlets.

Thanks all

Rct