[MW:12726] existence of

Dear All,

can anybody help :

we have some some small bore (1/2" ~ 1 1/2") gate valve in stock, when we open the valve by hand wheel and wedge goes up, some water comes out from inside of valve:

now my questions :

1-what is this water i n valve?
2-is it related to Hydro test?
3-can we reject these valves?

your prompt reply would be highly appreciated.

Regards,
Zarei

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