Dear Lab Guy, I have a question regarding the table-top Polyethylene Buchner Table-Top Funnel. Are those meant to be used for vacuum filtration or gravity filtration? If it's for vacuum, do you have a recommendation on the pump, hose (and/or a separate water container?) set up that can work with that funnel. Thanks! Li Y.

Dear Lab Guy, I have a 18” table top Buchner funnel. I have air leak where the plate sits inside at the wall. Is there something I can use to seal this? Best regards, Josh