You can see it right in that picture. All you do is put a 90 on the riser tube, then a gate vale, and then another 90 facing down. Lower the riser tube all the way, and then fine tune the gate valve to adjust your water level.
THink my 1" gate valve would work on my G4?
The plan calls for a 1.25" gate valve. I could use a reduced bushing to make the 1" gate fit.
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