I maybe went a bit overboard...rebuilt my entire system. Used a 4 place canister holder in reverse. It’s set up as follows
Stage 1...5 micron filter
Stage 2...1 micron filter
Stage 3...universal carbon block
Stage 4...universal carbon block
Then to the middle pressure gauge...this is to see when the pressure drops and filters need replacing
There is a tee after this with a ball valve so that 8 can test for chlorine after the carbon blocks (my house has 1ppm total chlorine currently)
Next is the booster pump tuned down to 80psi with the left pressure gauge...then
Stage 5 and 6 are 2 75gpd membranes in series
Dual TDS meter shows TDS in (my house is around 230ppm) and out after the membranes
The. Stage 7, 8, and 9 are the BRS 3 stage DI with triple TDS meter. Using the cation, anion and mixed beds.