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