They're to keep the water from contacting the nipple. You want to leave them in place, or replace the nipples with brass.
...and was wondering what these plastic inserts are? Should they come out before install? They are open except for that little tab in the middle.
Thanks in advance.
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They're to keep the water from contacting the nipple. You want to leave them in place, or replace the nipples with brass.
Ok. Thank you.