[Ringodoggie]

I am trying a few things and I bought a very small (30ml) Buchner funnel.

I was going to use the pump I use with my BHO vac chamber but I am wondering if that's going to be too much neg pressure for this tiny glass funnel. It's a 3CFM 5P pump.

Here's the funnel.

https://www.ebay.com/itm/30ml-24-40J...72.m2749.l2649


Any comments are appreciated. Thanks

[Ringodoggie]

I am thinking that a hand pump might be more suitable for this application. I know I would have to keep pumping to maintain the vacuum but we are only processing 10 to 20ml so it shouldn't take long.

How about one of those brake bleeder kits. Cheap. Decent gauge to see the pressure.

[bloyd]

Water aspirator

[Ringodoggie]

Excellent idea. I have to check out the feasibility where I live. Water is very expensive here. About $0.15 a CF. If the faucet has to run for an hour, that's about 10 bucks. LOL My toilet flap got stuck once and it was late night before I got home and noticed it. My water bill was almost $400 that month. :(

I think I saw a recycling water aspirator. I could make that with a simple submersible pump dumping back onto itself.

I saw cheapo plastic aspirators for 20 bucks and nice glass ones for over $100. Is there a difference in performance. Same principle applies to both.

Thanks again.

[bloyd]

A cheap metal or nalgene aspirator would provide plenty of vacuum for a small Buchner like you posted.
What are you trying to filter through the Buchner?

[Ringodoggie]

Thanks. I'll see what's available.

The first thing through the funnel will be Everclear and rosin mix.

Thanks again