Lines to and from storage tank

[free75degrees]

I am getting ready to assemble my copper coil HX and I have a question. I will have 3 or 4 coils of 1/2" copper in parallel and I am wondering what I should use to connect them to the output from the Tarm. I will be hiring a professional to do the bulk of the plumbing, but I do want to get the coil assembly put together with input and output stubs sticking out of the tank that my plumber can connect to. Should they be 3/4", 1", or larger? Should I use copper to get from the Tarm to the tank? The tank is only a few feet away from the Tarm 40, and the tank is 800 gallons unpressurized.

 

[Nofossil]

I am getting ready to assemble my copper coil HX and I have a question. I will have 3 or 4 coils of 1/2" copper in parallel and I am wondering what I should use to connect them to the output from the Tarm. I will be hiring a professional to do the bulk of the plumbing, but I do want to get the coil assembly put together with input and output stubs sticking out of the tank that my plumber can connect to. Should they be 3/4", 1", or larger? Should I use copper to get from the Tarm to the tank? The tank is only a few feet away from the Tarm 40, and the tank is 800 gallons unpressurized.

I used 3/4" copper, but I only have an EKO 25 with a small circulator. Three 1/2" lines have a bit more cross section than a 3/4" line, so if you're running a bigger circulator you might want to stick with 1" to keep the fluid velocity down.

 

[free75degrees]

OK, I'll go with 1", thanks.