Neptune COR20 Included Fittings Question

[rhostam]

Hi, I have a question about the COR20 included fittings.

They are:

• 1.25” union
• 1” fitting w/ o-ring
• 3/4” fitting w/ o-ring

Question:
Is the included 1.25” union to be used on the output or on the input? It fits the output and that is where I’d like to use it.

However, the depth of the 1.25” union female is about half of the male end of the COR20 output and doesn’t come close to the o-ring on the COR20.

I’d like to learn about plumbing so this will be my first lesson. Whatever feedback you can provide will be appreciated.

 

[lapin]

INCLUDED FITTINGS​

The COR comes complete with all the fittings necessary for most aquarium configurations (0.75″ output, 1.0″ input). But we’ve also included a 1.25” union for the output so you can connect the pump in a manner that will result in the least amount of head loss.


You will need to convert the 3/4 output to 1.25
A trip to the hardware store with both pieces and let them show you what they have



Plumb your main return-line in 1.25″ and get the full potential of the COR pump – as much as 50% or more flow!

 

[rhostam]

INCLUDED FITTINGS​

The COR comes complete with all the fittings necessary for most aquarium configurations (0.75″ output, 1.0″ input). But we’ve also included a 1.25” union for the output so you can connect the pump in a manner that will result in the least amount of head loss.


You will need to convert the 3/4 output to 1.25
A trip to the hardware store with both pieces and let them show you what they have



Plumb your main return-line in 1.25″ and get the full potential of the COR pump – as much as 50% or more flow!

Thanks, I’ve read that.

I guess I don’t understand. Let me paraphrase what I’m reading there:

The COR20 threaded output is 0.75”.
The 0.75” fitting that is included and attached should be plumbed to 0.75” pipe that is then upsized to 1.25” then I can use the included 1.25” union?

If that is the case, cool. Disappointed the union isn’t slip on both ends, though.

 

[QU4NTX]

Thanks, I’ve read that.

I guess I don’t understand. Let me paraphrase what I’m reading there:

The COR20 threaded output is 0.75”.
The 0.75” fitting that is included and attached should be plumbed to 0.75” pipe that is then upsized to 1.25” then I can use the included 1.25” union?

If that is the case, cool. Disappointed the union isn’t slip on both ends, though.

How did you end up pluming your COR20. I have the same questions.

 

[rhostam]

How did you end up pluming your COR20. I have the same questions.

Hi there.

I ended us using the included 3/4” slip connection.

Included 3/4” slip union -> 3/4” sch 80 -> 1” to 3/4” slip reducer -> 1” slip spigot barb.

I bought so much extra plumbing. I believe I isolated the parts list from my order history:

Description	BRS SKU/ Amazon Link
3/4” COR20 Union Slip	n/a included with COR20
3/4” Schedule 80 Pipe	202700
Schedule 80 Reducing Coupler 1” Slip x 3/4” Slip	202568
1" Pipe Adapter Spigot x Barb	207927
Oatey 30246 PVC Regular Cement and 4-Ounce NSF Purple Primer Handy Pack	Amazon Link

This was my first glue job. So don’t mind the mess. I am proud to say I’m much better at it ever since I put together my own mixing station. LOL.

I let it run/test for a day:

In the sump. Note that I left some space between the sump and the cabinet wall to allow me room to clean. This results in the house having to flex a bit.