How to prevent TDS Creep, anyone?

[Andy CWS]

Yes, the TDS remains consistent throughout its production and soak time.

I'll check on membrane manufacturer. Their rating through WQA is 75 gallons per day in lab conditions. The subchamber is refilled with permeate water not 'tap' water. This is what flushes the membrane upon topping the tank off.

The WOW tank reills immediately unlike bladder-style tanks which are nearly empty before refilling.

Andy

[Bart]

The subchamber is refilled with permeate water not 'tap' water. This is what flushes the membrane upon topping the tank off.

Andy

Ok the sub-chamber is purified water on standby for flushing, but what about the membrane chamber after purified water flushes it -- does it stay empty or gets filled up with water...and which type, permeate or tap?

[Andy CWS]

Ok the sub-chamber is purified water on standby for flushing, but what about the membrane chamber after purified water flushes it -- does it stay empty or gets filled up with water...and which type, permeate or tap?

If the membrane flushes and the water isn't used, then it refills with RO water until new source water comes into it to pass through the membrane via the prefilter. So if you leave the house for a month, The membrane sits in permeate water the whole time. Does that answer your question?

Andy

[Bart]

Yep. Thank you for confirming that, Andy. Membrane rests on r/o water = no TDS creep = peace of mind.

The water technician/rep arrived at the house this morning and tested the quality of the water which I thought would be a comprehensive test but it turned out only for hardness and chlorine.

How much did you pay for yours?

On a side note, I need to re-drill the drain hole in the pipe to fit a 3/8 tubing.