I am about to replace an elderly brass float valve feeding a loft cold
water tank. I see that I have choice of Part 1 or 2 brass valves (what
is the difference - both seem to be available in high and low pressure
versions?). I thought that equilibrium type valves were usually confined
to WC cisterns but do have the advantage of being quiet. If these are
suitable does anyone know what is the difference (apart from price)
between Torbeck and Siamp. From an ongoing maintenance viewpoint is
there any advantage of the equilibrium valve over the traditional brass
type in a hard water area?

The full range appear to be available at
http://www.toolstation.com/shop/Plum...ves/d20/sd2696

Grateful for any advice.
--
Robert