Renovating bathroom just now and the wife wants mixer taps throughout. Normal single handle hobbj on the sink and a fancy traditional style beast on the bath. Hot water is supplied from unvented cylinder at 2 bar closed pressure, 1.5 bar ish when flowing full tilt. Cold is supplied from mains at about 4 bar closed in. I'll need to fit a pressure reducer on the cold side and I'm wondering if altecnic are any good as the y are significantly cheaper than Honeywell. I'm well aware of the adage you get what you pay for so illI pay for Honeywell if I have to, but I thought I'd at least check with the pros. I'd guess I'd need to set it for roughly the operating pressure of the hot water system rather than the closed in. Should I also fit a non return valve?