Hi all. A newbie here. We have bought a Mondella Resonance pin lever shower mixer in Matt Black to match all the other tap fittings in the unit. But when it comes to this mixer tap, we have run into a wall. The tap appears to be one complete unit so we were wondering if this can be unscrewed so we can just unscrew the old chrome one that is currently in the shower & just screw the new Matt black fitting over it? Or do we have to take the old one out completely & fix the new one in? It seems that the tiles have been put in after the mixer was installed originally so is this a job better suited to a plumber? We have 3 to do so looks like a mission



