The Manifold...
The Heating and Plumbing Warehouse uses a unique all in one manifold. No need to assemble pump, thermostats or valves. Everything is made ready to go on the wall. Most of the manifold models fit in a cupboard. Larger models will go under the staircase or in a utility room.  The HPW manifolds are available in 1 to 16 ports. All manifolds are double lockable which means that every circuit can be closed separately.  The manifold is simply plumbed in as a radiator, 15mm * pipe flow and return (* 22mm for manifolds larger then 8 ports).