I'm planning on fitting a monobloc basin mixer tap in my new bathroom, but I'm wondering of I'll need a non-return valve on the hot supply..
The cold supply is mains fed at approx 1bar, but the hot supply will be gravity fed, at approx 0.2 bar.
Do I need to fit a NRV on the hot supply to prevent the higher pressure cold water flowing back up the hot pipe?
I know there are 2 types of mixer... single flow and dual flow, and dual flow means the hot and cold don't mix, so no danger of backflow.... the problem is that the tap I want to get doesn't say what type it is.
http://www.anybath.com/shop/taps-wastes/fairport-shaker/fairport-shaker-single-lever-673414.html
Should i fit an NRV to be on the safe side?
The cold supply is mains fed at approx 1bar, but the hot supply will be gravity fed, at approx 0.2 bar.
Do I need to fit a NRV on the hot supply to prevent the higher pressure cold water flowing back up the hot pipe?
I know there are 2 types of mixer... single flow and dual flow, and dual flow means the hot and cold don't mix, so no danger of backflow.... the problem is that the tap I want to get doesn't say what type it is.
http://www.anybath.com/shop/taps-wastes/fairport-shaker/fairport-shaker-single-lever-673414.html
Should i fit an NRV to be on the safe side?