Needle housing
7.
Replace the O-rings on the needle housing as shown below.
8.
Once the O-rings have been replaced, wet the injection pin with water or
Medispray and then insert into the housing as shown below.
9.
Replace the O-ring on the end piece if it is visibly damaged. Wet the end piece and
insert it into the injection pin as shown below.
10.
Then insert the assembled needle housing into the injection gun. Wet the assembly
with water before insertion.
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