Drain Line Size (8GPM Backflush)

[bluelogic]

I'm adding a catalytic carbon filter to my water softener. It has an 8GPM backflush and the book recommends a 3/4" drain line. My drain line is 1/2". Do I have to upgrade the drain line? The drain line is PVC runs near the floor and 3 feet long connected to an air gap to a sewer out next to my garage.

bluelogic

 

[ditttohead]

You will be fine with 1/2" but it will be a bit noisy.

 

[Sponsor]

 

[bluelogic]

How noisy are we talking about? It is in the garage near the front of the house.

I lied, the drain line is PEX.

Bluelogic

 

[bluelogic]

Went super husband and got a 1" Mason bit and plumbed the entire system with shark bites and pex.

 

[ditttohead]

Hard to say how noisy, many variables. it may be fairly quiet... velocity in pipe = noise. Larger pipe, less noise it typical.