RO Expansion from 2x4 inch to single 8 inch

[Maplewalnut]

Looking for someone who has converted a two post 4inch membrane RO to a single 8 inch membrane. I assume there is a minimum feed pump size I would need but what else should I be concerned with? Also what approximate gph could I expect 400-500?

Not sure if I am going to try and expand my current set up or look at an off the shelf 600gph machine.

thanks
Mike

[mountainvan]

I did a couple years back. I already had a large enough motor, 5hp, on my sled. I just had to get another ro vessel and membrane. I think it was around $8,000+ from cdl.Talk to Clayton at mes, I'm sure he could set you up and his membranes are great. I was getting 600 gph from 2%- 14% on one pass.

[mellondome]

Mike,
We talking home made or commercial?

Without recirculation you should get about 250-300 gph with an 8".