The mag 9.5 is rated at 950 gph not 750, im estimating conservatively a 600gph flow at head height about 5ft. As per manufacturer's flow curve and real world numbers. If I get 500gph after all the friction loss of plumbing I will be happy.
Turnover wont be of the utmost importance since im running some modular filtration in the sump which is not dependent on the falling water from the drains alone.
I had originally planned on the 1.5" branching into a pair of 3/4" spraybars but after some digging I found that a 3/4 + 3/4 pipe does not equal the same inner diameter of a single 1.5" pipe. Its significantly smaller. So I went with 1".. I figure the friction loss in the bends going to the spray bar will be slightly negated by the slower water velocity traveling through a larger pipe. Im not looking for a Jetstream coming out of the spraybars I just want good flow around the tank as opposed to a single locline nozzle.
The manual does call for a 1.5" pipe, this confused me but after seeing how all the saltwater guys were running oversized returns I finally gave it the confidence to go ahead with it.
Ive got a huge amount of space in the stand, basically the main reason I built one versus a store-bought. Im hoping my measurements are correct and ill have enough room. If the drawers are too much of a tight fit I'll man up and make some custom ones out of acrylic.
Thats the inside with a 24" level standing up right for scale.
I snagged the gate valve off amazon. It cost about $10. Reviews were good so I bit. Thanks for the tip on primer. Ive read before that it doesn't do a whole lot, many plumbers dont use it
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