Its only risky because the lazy fellow who fitted it did not remove the washer when soldering it in! Even his soldering would give rise to some complaints.
Its good practise to exercise both air vents, drain cocks, stop cocks and gate valves during a service. Rarely done unfortunately but I like to!
Saves the problems I have been having at an install where the mains water supply is in 1/2" copper.
I do everything to avoid touching gate valves and drain cocks.
Are you actually saying that on every service, you go around the house doing your exercises?. Average semi with rad pipe drops probably has at least 4 cocks.
I get it , just about, if you are talking about valves that you KNOW are in good nick, but unless you have maintained it from new, you can't (know)
I did self moderate my post earlier, but there was somethng in it about having to carry a bung kit and laddders, or a hosepipe. Neither is conveniently carried on the X42.
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