Hi all,
Isolation valves are ok if fitted to commercial premises, for example: would you shut down the hot water services to all rooms, kitchens etc to replace a washer on a hot tap, NO!, so yes isolation valves are good.
But for domestic use, if you look down the center of a isolation valve, penny valve or ballafix valve, whatever you wish to call it, on a 15mm valve the opening must only be 10mm, which is a flow restriction, as on a bath, sink and basin most combination boilers only give between 9 liters and 14 liters a minute, depending on the incoming main.
Would you fit restrictions?
P.S
Sorry about that it was litres not liters, sorry
