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Unread 01/29/2009, 12:13 PM   #119
BeanAnimal
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Join Date: Feb 2003
Location: Pittsburgh
Posts: 20,772
Quote:
Originally posted by Canadian
Hey Bean,

I'm planning on doing this on a smaller scale on a smaller tank (24 x 24 x 20) and plan on using 3/4" fittings. I believe I asked you previously if that was adequate sizing for about 300-400 GPH flow (obviously not much) and you said it should be fine.

Anyway, one of the things I'd like to do is use 3/4" black vinyl tubing and John Guest or Mur compression fittings rather than spa flex, rigid PVC or hose barbs to make connections to the ball valves and bulkhead fittings. Do you think these would be effective in terms of being air tight? I like the idea of using them because they make things a little more modular and easier to disconnect for maintenance and modifications.
I am not sure how they do with negative pressure. I would imagine they should be fine though.


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