Ok if I cut about 4 inches off the red control tube would it cause any problems? My reason for wanting to do this is my limited height under the stand. Cutting 4 inches would make it so much easier to remove for cleaning etc....
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It doesnt come above the cup but the collection cup comes off and is easy to put back on once the body is in the sump. Gate valve might be a good fix if i do have problems.Sorry, but I didn't think the red tube went above the collection cup. So I don't understand how height is a problem.
Can you cut the tube and add a gate valve to control the bubble height.

