The liner 30 is formed of a flexible material preferably a rubber such as {HEAD ~ a TPR rubber} which is known in {TAIL ~ the plumbing art} 
is known in
The liner 30 is formed of a flexible material preferably a rubber such as { HEAD ~ a TPR rubber } which is known in { TAIL ~ the plumbing art }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL