During installation of the valve 11, {TAIL ~ the spring} 13 is inserted into {HEAD ~ the housing} 12 and the closing part 16 is then pressed behind the latching 
During installation of the valve 11 , { TAIL ~ the spring } 13 is inserted into { HEAD ~ the housing } 12 and the closing part 16 is then pressed behind the latching
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH