Bounce an idea about my return

[svandive]

I've got a 180 gallon setup today with a 1" return runs the length of the tank (six feet) before going up the 4.5 feet to the tank top and the U return. the idea originally was that I would tap in to that horizontal run as a manifold at some point. Well I never have and now I want to redesign the return.

My plan now is to come straight back and up from my return pump (COR-20) and have a Neptune Flow Meter on the return. My question is is this:

I want to come off the COR-20 using the provided 1.25" connector, and immediately size up to 2" pipe. this will then carry up to a vertical mounted 2" Flow Meter, and then up to the U and in to the tank. Are there any reason why this would not be a good idea? Thoughts? Suggestions??

From what I've learned using the 2" pipe will reduce friction and provide the maximum flow I can expect in this setup from my COR-20 pump. I can then use the pump to control my flow rate.

I hope this all makes since...

Thanks

 

[sbash]

Although, I can't quite picture what you are describing, changing the pipe size mid pipe will reduce your flow efficiency.

Are you talking about doing this:

Pump -> 2" Pipe -> 1.25" COR-20 1.25" -> 2" pipe -> take outlet

or:

Pump -> 2" Pipe -> 1.25" COR-20 1.25" -> 1.25" pipe -> take outlet

Either would likely work fine, I doubt there would be much difference in flow between the two configurations, but your efficiency is lost at the 1.25" fitting.

Also keep water volume in mind when you go up a pipe size. For example, A 1 foot run of 1" pipe holds .04 gallons of water, while a 1 foot run of 2" pipe holds .16 gallons of water. So if you pipe run is the same length, you need four times more water to fill the pipe, which also means four times more room in the sump when the pump is off.

 

[svandive]

Actually it's this:

Core-20 Pump -> 1.25" Pipe -> Reduction Bushing 1.25 <-> [2" Neptune Flow Meter 2"] -> 2" Pipe -> Outlet

Sorry my original description was not clear....

The outlet on the Neptune COR-20 Pump is is 1.25" so it's as big as I can start.

Your point about the water volume in the pipe is a great lessons and something I hadn't thought about. Luckily, I'm removing 6' of 1" pipe in the new setup which should equate to less overall back flow water volume tot he sump. However I would never have thought to calculate that if you hadn't pointed it out!!

 

[sbash]

Actually it's this:

Core-20 Pump -> 1.25" Pipe -> Reduction Bushing 1.25 <-> [2" Neptune Flow Meter 2"] -> 2" Pipe -> Outlet

Sorry my original description was not clear....

The outlet on the Neptune COR-20 Pump is is 1.25" so it's as big as I can start.

Your point about the water volume in the pipe is a great lessons and something I hadn't thought about. Luckily, I'm removing 6' of 1" pipe in the new setup which should equate to less overall back flow water volume tot he sump. However I would never have thought to calculate that if you hadn't pointed it out!!

Oh, the Core-20 is the pump, I mis-read, I thought the Core-20 was the flow meter... I was a bit sleepy after lunch!

Then yeah, it is a good plan, lol...