jcw
New member
My unit is a puratek 100gpd deluxe 4 stage RO/DI with booster pump. It had been running for more than 2 years with the same filters, resin. 0 tds coming out of the DI. 90 at the tap, 0 after RO.
Recently I was getting a lot of TDS creep after RO when the unit turned on after the autoflush completed. Goes up to 40's then back down to 0. Then the TDS went never dropped below 2 after the RO. The filters were getting very discolored so I changed everything out.
Went with BRS. Spoke with someone and specifically mentioned my unit and said I would like to get the best replacement filters to match the performance I got with the original.
I went with the Filmtec 75 with the restrictor. Replaced them per the video instructions at the site.
Now, I get 90 going in, 8-9 out the RO.
Any reason this should be happening? I thought moving from the 100gpd membrane with 90% rejection rate to the 75gpd with 98% rejection rate I should be getting less TDS.
Recently I was getting a lot of TDS creep after RO when the unit turned on after the autoflush completed. Goes up to 40's then back down to 0. Then the TDS went never dropped below 2 after the RO. The filters were getting very discolored so I changed everything out.
Went with BRS. Spoke with someone and specifically mentioned my unit and said I would like to get the best replacement filters to match the performance I got with the original.
I went with the Filmtec 75 with the restrictor. Replaced them per the video instructions at the site.
Now, I get 90 going in, 8-9 out the RO.
Any reason this should be happening? I thought moving from the 100gpd membrane with 90% rejection rate to the 75gpd with 98% rejection rate I should be getting less TDS.