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What does NW1 and BOLOFIX mean on a 15mm isolating valve? and are they good enough for a mixer tap flex tails thanks.

It's a high water pressure mixer tap. What would help with the rising and falling of temperature? The other taps are single lever round taps where as the basin tap is a rectangle fountain mixer tap (creates quite a mess when running, no aerator), when the tap runs one side of the water is cold...

Thank you for the replies, I am changing the basin tap as the current one doesn't have a balanced flow, the temperature goes up and down, it's either too hot or cool. I bought a high pressure tap and that is why I have been thinking about the full bore service valves. Also does the rising main...

Thank you for the reply, so is it good practice to have both types of valves fitted on a basin and kitchen copper pipes or does having one of them suffice. The valve on the toilet flexi looks like this Full Bore Isolating Valve CP 15mm (toolstation.com) The ones under the kitchen sink and basin...

Hi, my toilet has a flexi pipe, then a service or isolating valve on it, sorry I don't know the difference. What is the difference between a service and isolating valve and are both required on water feeds in the kitchen and bathroom. My kitchen, basin and bathtub have 15mm isolation valves...

Good morning everyone, New to the forum and looking for information to help me figure out plumbing work in my flat. I have provided details to give you an idea of what I may need and would be grateful for advice. I live on the top floor of a 2nd floor flat in a block of 6 and the cold water...