Doctor Evil wrote:

The header tanks were detachable. Depending on model and year then.
Get your
model number and rung Gledhill, they will put you right. If it
cannot be
detached theb install a small F&E tank on brackets at high levels on
the
wall and cut into the existing pipes serving the extising header
tank.
Check pipes sizes


Excellent. I've found the feed pipe round the back of the store now so
I think I'll be able to re-use it. Would it be worth using the store
just for hot water and having the CH straight off the boiler?