RODI Hooked up to hose

[Reeferz412]

For the life of me I cannot seem to get under 7 TDS with my ro water. I got 4 TDS one time and 3 another time but now its been a steady 6 or 7. I just replaced the di chamber two weeks ago and the membrane a few months back along with the blocks. Could it be because of the varying pressures coming from my hose? Excuse my lack of knowledge about this, if someone could break it down for me that would be great.

Also, when I flush the the system I dont see it travel through my di chamber. Is this ok?

 

[Reeferz412]

Let me add, I make water about once every 3-4 weeks.

 

[shifty51008]

You dont want your flush water going through your di or it will exahast it very fast, all flushing is doing is flushing the membrane of bigger particles and sending them down the drain

As for your tds that depends on pressure, tds of the incomming water and how good the membrane is. Your tap tds can change day to day so i am sure if your watching that it will make a diffrence.

But all in all 7 ppm isnt to bad depending on what the tds is of the tap water.

 

[telijah]

If you're using an inline TDS, make sure the probes are perpendicular to the water flow for accurate reads. Is this the reading before or after the di resin?

 

[AlexAquaFX]

Hey Alex! As Shifty said flush should not being going through your DI so you're all good there. As far as as your membrane.. whats your incoming TDS and whats your pressure at the beginning of the system and at the RO membrane? Also have you been able to achieve the 3 or 4 PPM on the current membrane? Is it the same brand as the original you replaced or a different manufacture.

 

[Reeferz412]

The reading is after the Di resin.
I'm not too sure what the pressure is since I do not have a gauge to tell me. My Tds meter is not in line it is a handheld meter. The Ro membrane is from eBay. I cannot recollect what company I purchased from. I believe the mistake I made was purchasing a 75 gpd membrane when my unit is supposed to be 100...

 

[Reeferz412]

Also, as of now it stays 6-7. When I changed the Di resin it came out 3-4 the day of.

 

[telijah]

Anytime you get a different gpd membrane, you must get a matching flow restrictor. So if you had 100gpd before and got a 75gpd membrane, you need to get a 75gpd flow restrictor

 

[Reeferz412]

That probably answers it. I gotta see if it is 100 or 75. I purchased a 75 restrictor but have not installed it yet just in case the old one breaks. Looks like I will switch it out.