The invention relates to {HEAD ~ apparatus} for connecting {TAIL ~ a radiator} to a single or double tube type hot water central heating system 
for connecting
The invention relates to { HEAD ~ apparatus } for connecting { TAIL ~ a radiator } to a single or double tube type hot water central heating system
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH