ive just bought a cottage to renovate, i have a old copper immersion tank with a supply tank built in above it, i want to put a new system up in the attic so i get a higher pressure and its not above the stairs, the problem i have i only have about a mitre in hight in the highest point of the attic, ive only seen tanks 950mm tall and i believe they need a cold water tank fitted above it, do they make shorter wider tanks? thankyou