The fixture is constructed with {HEAD ~ surfaces} that allow the fixture and {TAIL ~ water} to form a seal around each device 
allow
The fixture is constructed with { HEAD ~ surfaces } that allow the fixture and { TAIL ~ water } to form a seal around each device
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH