GPM drop calc on parallel pipes

[rickcf]

I need some generic answers to gpm questions.

I have a pipe with water traveling at about 10 gpm via a pump. The pipe travels 100 feet where it then separates into parallel pipes.

One branch continues straight for 7 feet.

The other branch travels 21 feet total = Down 7 feet, across 7 feet then back up 7 feet then meets with the first branch.

What is the approximate gpm on the long 21’ dropping/rising branch of the parallel? Is there a significant drop from 10gpm on the long branch?

Generally will the gpm still be 10gpm after the parallel – I assume so?

Rough estimates only – do not need exact numbers – just trying to see if this is doable – if my pump can handle it. I am concerned the gpm flow through the long parallel will drop drastically and I am wasting my time going through that branch with my current pump.

Thanks

 

[johnjh2o]

What are you trying to accomplish?

 

[rickcf]

I am trying to find out if there is a GPM drop in the long parallel branch. If so approximately how much.

 

[speedbump]

You need the pipe size, type (copper, plastic, galvanized etc) then go to a friction chart. There's one on my site here: http://www.pumpsandtanks.com/Helpful-Info/Friction-Loss-Chart.htm