Hi all. I'm a DIYer about to change an old bathroom sink for a new one. It's currently all done in 15mm copper with no isolating valves and plumbed straight into the taps without any flexi hoses or similar.
My questions are these:
1. I'm going to fit isolating valves, probably Pegler full-bore lever type. Is this the best idea?
2. Do I need some sort of check valve for backflow prevention or does the air gap from the tap to the basin suffice? If so, would this be fitted before the isolator on the supply side?
3. Is it a good idea (or even required) to fit some sort of drain cock after the isolating valve?
4. Due to the design of the monobloc I'll be using, I guess I'm limited to using flexi-hoses that are supplied with it. Can I do anything about the pressure drop associated with these hoses or use copper tails?
I've tried to search for these answers already in the forums (fora?), especially the drain cock bit, but not really come up with anything definitive.
Many thanks in advance for your help and the benefit of your experience. I could get a plumber in, but this seems pretty straightforward. I just want to do everything as would be expected by current regs.
My questions are these:
1. I'm going to fit isolating valves, probably Pegler full-bore lever type. Is this the best idea?
2. Do I need some sort of check valve for backflow prevention or does the air gap from the tap to the basin suffice? If so, would this be fitted before the isolator on the supply side?
3. Is it a good idea (or even required) to fit some sort of drain cock after the isolating valve?
4. Due to the design of the monobloc I'll be using, I guess I'm limited to using flexi-hoses that are supplied with it. Can I do anything about the pressure drop associated with these hoses or use copper tails?
I've tried to search for these answers already in the forums (fora?), especially the drain cock bit, but not really come up with anything definitive.
Many thanks in advance for your help and the benefit of your experience. I could get a plumber in, but this seems pretty straightforward. I just want to do everything as would be expected by current regs.