Return Pump and Manifold Questions

[nsconductor]

Working on laying out a manifold for my 120G build and looking for comments on v1.0 of the design. Attached picture should help clarify my initial thoughts.

1. Manifold Size - 3/4"?
2. All valves are just ball valves
3. Is the line up ok? Or should it be changed?

Pump sizing - My thoughts are for turnover rate in the system of about 750 GPH. In planning to drive the reactors off of the manifold, I was thinking of pump capable of producing 950 GPH at calculated head. I figured the head by using a 15.8 GPM rate, 3 horizontal feet of pipe at 3/4", 5' of vertical lift, 3 feet of misc head loss (to account for 3 reactors in total), 2 90s and 4 Ts. I came up with total pump head required of 15.7 feet. Therefore, I need a pump that that can produce 950 GPH at 15.7 feet of head. Does this make sense? Any pump brand recommendations?

Any other feedback is most welcome. Thanks in advance.
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[rdnelson]

Pretty much the same as I set mine up but I didn't do all the calcs. I just went with a used Quiet One 6000 which is about 1500 gal per hour. Right now it feeds my five and a dual BRS reactor.

 

[eagle9252]

you can double check your numbers at this site below just to if your number are close to theirs.

 

[nsconductor]

rdnelson99;825065 wrote: Pretty much the same as I set mine up but I didn't do all the calcs. I just went with a used Quiet One 6000 which is about 1500 gal per hour. Right now it feeds my five and a dual BRS reactor.

Rich - Did you have to valve back the pump to your return line based on it's large GPH rating? Any issues in doing so if you had to? 3/4" Manifold?

 

[eagle9252]

not answering the question but i always add a return off the pump back in the drain side of the sump. this way you can loop the water in sump if needed. when i do my weekly wc i loop the water and let it mix with the other half in the sump for and hr or so while i feed the tank. then i open the nv to the tank and close the bv to the sump.

 

[nsconductor]

eagle9252;825359 wrote: not answering the question but i always add a return off the pump back in the drain side of the sump. this way you can loop the water in sump if needed. when i do my weekly wc i loop the water and let it mix with the other half in the sump for and hr or so while i feed the tank. then i open the nv to the tank and close the bv to the sump.

Great Idea! Thanks. That makes a lot of sense to me.

 

[rdnelson]

Nsconductor;825356 wrote: Rich - Did you have to valve back the pump to your return line based on it's large GPH rating? Any issues in doing so if you had to? 3/4" Manifold?

I have a ball valve in the return but it is wide open. Off the pump I have a 1" X fitting. Continue up with 1" and hit 3 discharges. I neck down to 3/4" ball valves just before the discharge. Off one side of the X I feed the skimmer thru a ball valve. The other side I have a 1" manifold for reactors. I also have a 3/4" branching off the manifold to feed the Fugere.

I will try to post a couple pics here in a bit.

 

[rdnelson]

Here are a few pics that may help.

Edit: By the way, after these shots were taken I did cut a valve in feeding the skimmer. Pretty cool to see what happens to the skimmer cap when you shoot 1500 gal/hr through it. LOL
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[grouper therapy]

I know this sounds elementary but make sure you space the valves far enough apart so that when they closed the handles clear each other.

 

[eagle9252]

grouper therapy;825366 wrote: I know this sounds elementary but make sure you space the valves far enough apart so that when they closed the handles clear each other.

sounds like you have been there... lol

also make sure when useing unions you put the stupid spinning nut back on before you glue it :doh:

@ Rich. hey, no pics... so, it did not happen

i need to update my plumbing pics since i went from an left side interenal pump on the 55g sump to and extrnal pump on the 75g center return that is drilled and piped thru the right side baffles.

 

[rdnelson]

eagle9252;825368 wrote: sounds like you have been there... lol

also make sure when useing unions you put the stupid spinning nut back on before you glue it :doh:

@ Rich. hey, no pics... so, it did not happen

i need to update my plumbing pics since i went from an left side interenal pump on the 55g sump to and extrnal pump on the 75g center return that is drilled and piped thru the right side baffles.

I see pics. .