Hey you guys first of what is BUMP

??? I always see it in postings . . . or WTB

??? Anyhow your cpr cs90 does it have a pump? (I have the cs50 and it has a pump to prevent it from stopping the flow just incase power goes out . . . it also takes all the bubles out from the overflow box) Anyhow let me know and is it still available??
Thanks