Is such a thing available? I have replaced my WC cistern ballcocks with Torbecks as they are so quiet. i have a big cold water tank to service a fair sized building with a 3/4" ballcock in the loft, I wanted a 3/4" equilibium, my local supplier hadn't got one and said they weren't made, is this true? i phoned Torbeck and they don't make them, does anyone know a source?