Different sized rodi membranes

[Gtinnel]

My current rodi setup has two 100gpd membranes in series and I have been contemplating adding a third. BRS currently has the water saver that has the 75gpd membrane in it on sale (unfortunately the one with the 100gpd membrane isn’t on sale). Is there any issue with adding another membrane in series that had a lower production rate?
I would also plan on changing it out to a 100gpd membrane whenever I would need to replace the membrane.

 

[mdb_talon]

I dont really know the answer, but will bump this up! My concern would be using presumably a 100gpd restrictor with a 75gpd membrane at the final stage. How much that matters in that scenario though I would guess to be minimal... but that is just a guess.

 

[Gtinnel]

I dont really know the answer, but will bump this up! My concern would be using presumably a 100gpd restrictor with a 75gpd membrane at the final stage. How much that matters in that scenario though I would guess to be minimal... but that is just a guess.

Thanks for the bump. I can get the 75gpd with my $10 Black Friday code for a little over $30 today. I’ve tried googling the answer but I can’t find it anywhere.

 

[Gtinnel]

Just an update. I went ahead and got the water saver kit. I added the 75gpd membrane in series after my two 100gpd membranes. I left the same restrictor on it (I don’t remember the flow of it right off) and so far it seems to be working well. Even with 3 membranes I have 1ppm tds water going into my di and 0 coming out. I haven’t actually measured my production rate, but just from the looks of it my production rate has increased as I expected.