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Measure TDS of source water. You want a 90 to 95% reduction after the RO filter unit. Wait a few minutes before taking the reading (TDS creep).Hi everyone.
Just invested in RO unit and installed today.
I’ve a TDS meter, so now wondering what’s a ‘good’ level for RO water reading? Mine is coming up as 10ppm. Too high?
Thanks
The source water was showing >160ppm when I tested it prior to RO filters.... after RO filters it was coming out as 10ppm. I’m going to add on a DI unit onto my DDO RO unit so I can get TDS of 0.Measure TDS of source water. You want a 90 to 95% reduction after the RO filter unit. Wait a few minutes before taking the reading (TDS creep).
If using a Deionising filter after the RO, then the TDS reading should be zero at the end point.
Just note down that RO reading. When its eventually starts rising it's time for a new RO Membrane,,,, but don't forget about TDS creep, & wait a few minutes of flow through before taking reading.The source water was showing >160ppm when I tested it prior to RO filters.... after RO filters it was coming out as 10ppm. I’m going to add on a DI unit onto my DDO RO unit so I can get TDS of 0.
As per a web site description: To use, simply attach the Pod to the RO unit. Please note that it does not come with additional pipework.Hi again!
I’ve looked into getting DI unit for my current DDO RO unit. I’ve a couple questions though if anyone can help? .........
Does the
TMC V2Pure De-Ionisation Pod (500ml) inc Resin unit fit onto the DDO RO unit
And if so.......
How does it go on/fix in place ?
Thanks everyone x
The source water was showing >160ppm when I tested it prior to RO filters.... after RO filters it was coming out as 10ppm. I’m going to add on a DI unit onto my DDO RO unit so I can get TDS of 0.
Hi.How many GPD is your membrane rated for? Do you know the make of your RO membrane?
A 75 gpd Dow Filmtec membrane gets a 98% rejection rate. So at an incoming of 160 tds from the tap, your RO membrane should be producing no more than 4 tds.
10 tds from 160 tds source water means a paltry 93% rejection rate. Seems pretty low for a new membrane IMO.
Im sure it will help. Add it on and let it rip. It will take a few gallons to settle in. I think you will be fine. Only time will tell if its the unit or your TDS meterHi.
Yes, the RO membrane is D-DO. I’ve also got DI unit coming today to put onto the current RO system, hopefully that’ll help TDS reading. If not,.... I’ll have to strip it down, filters, membrane etc and work out what’s going on. It seems nothing goes my way when it comes to my hobby