can any kind soul point me to an online manual. Couple of other things.I need to fit a shower to a bathroom, I think there might Just be enough head for a bath mixer. Theres mains cold, plus gravity hot, so a pressure equalising valve is needed/ If not enough head, I'm back to the above gainsborough.I suppose this also needs matching pressure, can I fit an equalising valve in this instance as the pipe run from the header is a nightmare Many thanks