Dual return setup cor20 and m1
- Thread starter beardown
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Just a couple of things to comment on from your video.
First, both of these pumps require that you glue the pipe into their fittings. Not doing so could be quite dramatic when you fire them up.
Next, you forgot to put the o-ring into pump outlet before installing the fitting. That is why it seems loose when you wiggled it in the video.
Last, using the 1.25 union along with 1.25 plumbing up to the tank and then splitting to two 3/4" outputs into the tank will lead to a significant increase in flow compared to running 3/4" right from the pump. That is why we include that fitting.
If you have any questions, feel free to post on our NSI thread.
First, both of these pumps require that you glue the pipe into their fittings. Not doing so could be quite dramatic when you fire them up.
Next, you forgot to put the o-ring into pump outlet before installing the fitting. That is why it seems loose when you wiggled it in the video.
Last, using the 1.25 union along with 1.25 plumbing up to the tank and then splitting to two 3/4" outputs into the tank will lead to a significant increase in flow compared to running 3/4" right from the pump. That is why we include that fitting.
If you have any questions, feel free to post on our NSI thread.
Totally agree about the PVC size choice. Run 1.25 all the way until it must split and use a T fitting that goes from 1.25 > 2x .75 outlets. You lose a huge amount of flow with .75 right off the pump. I ran it in a calculator to give you an idea of how much the difference in flow and head lose is.
.75 =1066 gph
1.25= 1645gph
Good to know. I'll check out the forums again. I'm doing some plumbing tonight, so I appreciate the input. My last pump was definitely not as intricate, and I flex lined it all the way to the tank.
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I can't speak for the cor but for the vectra u need to use abs to pvc glue and it's a lot harder to do then that. I recomend using a vice as the two pieces will want to separate.
You could also just get the m1 fitting kit for ten bucs that screws on and makes it 1 1/4. If u are going to compare these two pumps please make it even as I'm interested in the diffence and if the cor was worth the wait.
Thanks
Justin
You could also just get the m1 fitting kit for ten bucs that screws on and makes it 1 1/4. If u are going to compare these two pumps please make it even as I'm interested in the diffence and if the cor was worth the wait.
Thanks
Justin
Tragically there is a fundamental ignorance in our hobby around how flow and pressure works in piping. If you understand this one fact you will be better off: a larger diameter PVC/tube will have less head lose resulting in more flow vs smaller diameter. There is a kind of a limit though, once you get to a certain size the gains start to drop off. Even though a 4" PVC will very little head loss and more flow it may not be more practical than 1.5".
My Reef Octopus Varios pump has no such problems, the 1.25 output came with a fitting that can easily be glued onto 1.25 PVC. Personally due to its vast features, build quality , and price point it is my favorite DC pump.
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What?
The fitting for the m1 is abs and he is using pvc so he needs to use that glue to bond the two. If not and he uses regular pvc glue it will eventually fail. When u use the abs glue it will push the m1's abs collar away from it hence why I recomend using a vice for a uniform fit and to not have a gap. I am lost as I have said nothing about a varios pump.
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No problem I do recomend grabbing the M1 1.5 plumbing kit for ten dollars as it is easier to work with.
And as everyone has said run 1.5 pipe as far as you can then bump down to 3/4 for the best flow.
I mean I run two return pumps and used the standard 3/4 pvc as I would have enough flow with both but if I was running one I would def bump it up to 1.5 to get the most flow out of your pump.
I believe the plumbing fitting sold for the M1 is 1.25" but I could be wrong. And it is not a union. That is exactly why we included the union in the box with the COR.
Kyl
And how does it feel like, to wake up in the sun
Oh it's definitely made me re-think things as I've been planning a tank upgrade, like not reducing down the return to 3/4" till the bulkhead on the tank, or the tee to two bulkheads. One thing, is there much benefit to going 1-1/4 (pump) > 1-1/2 (run) > 3/4 (T return lines), versus simplifying things with continuing the 1-1/4 pump output all the way to the 3/4 tee?
Kind of surprised that the literature isn't being plastered all over by the pump manufacturers.. unless it's a nefarious plot to keep people running with artificially restricted flows to increase sales of higher GPH pumps
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Terrance it is 3/4 and a collar u have to buy the 1.25
Also will we be able to purchase unions for this and the flow monitors?
I think I'm going to run this as 3/4" for now. I need to get this thing going tonight. I will replace the plumbing if I need to later on. Was on vacation for a bit, and I'm a little too anxious to see this thing in action.
I don't know if it is a plot or not but people are definitely buying bigger pumps with diminishing returns. In essence wasting their money and electricity.Kind of surprised that the literature isn't being plastered all over by the pump manufacturers.. unless it's a nefarious plot to keep people running with artificially restricted flows to increase sales of higher GPH pumps
So, this is one reason I did a MACNA workshop on this very topic. Furthermore I plan on working that into a video for when the COR releases.
I realize that.
I was commenting on why I liked the Varios pump. Doesn't have the same problem, also includes any and all fitting you would possibly need.
The pump has not been brought up, I brought it up, with reason. The Varios is in the same class as these two pumps you are comparing.
Oh it's definitely made me re-think things as I've been planning a tank upgrade, like not reducing down the return to 3/4" till the bulkhead on the tank, or the tee to two bulkheads. One thing, is there much benefit to going 1-1/4 (pump) > 1-1/2 (run) > 3/4 (T return lines), versus simplifying things with continuing the 1-1/4 pump output all the way to the 3/4 tee?
Kind of surprised that the literature isn't being plastered all over by the pump manufacturers.. unless it's a nefarious plot to keep people running with artificially restricted flows to increase sales of higher GPH pumps
There would be some benefit but as I mentioned earlier may not be practical. It would be very good if your Dual returns where 1" bulkheads not 3/4. I would buy a undrilled tank, buy your own overflow and plumb it how you want.
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Got ya
