Hi everyone As a new member (50 yrs in plumbing & Heating) came across this 12 connector manifold leaking at 2 places and having not seen one of these in all my years it looked like a dogs dinner.also another 12 pipe manifold a couple of inches away,but not leaking .House has 12 rads? so must assume that the 12 way connector leaking has a stop half way through to allow flow and return#6inlet and 6 outlet.have to mend this but they don't do 12 connector manifolds as I can see at moment so will have to codge it up without spoiling the flow rate...... any advise would be appreciated DaVE m