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SS should be OK. Contact with any other metal is not advised.

Handhelds: https://www.buckeyehydro.com/handheld-meters/ Inline monitors: https://www.buckeyehydro.com/in-line-1/ Russ

Remember that a TDS meter tells you absolutely nothing about when to change your prefilters (prefilters are all the filters that touch the water before the water reaches the RO membrane). From the FAQ's on our website: A good rule of thumb is to replace your sediment filter and carbon block...

RO membrane chloramine tolerance is very high, but where there are chloramines, you almost always have some free chlorine. RO membrane tolerance for free chlorine is much lower (~200 to 1000 hrs @ 1 ppm).

Technically, you are correct. Practically however, you'll find that RO water is so pure that the remaining non-H2O molecules are present in such low quantities that they are meaningless in the brewing process. Russ

Just to clarify - carbon doesn't remove TDS. TDS is removed by RO membranes, and by DI resin. I wouldn't be surprised if those zero water filters also contained KDF or ascorbic acid. Regarding TDS meters - typically even the low cost models are robust and work well. Unlike pH meters, if you...

Zero water is mixed bed DI resin rather than carbon

do you mean monochloramine?

you are correct. Rejection of different ions varies.

Iron at 0.3 will stain your tubs and sinks and toilets etc, and will shorten the life of an RO membrane. Is your iron filter undersized? Could you tweak its operation any to improve performance?

Might want to consider a leak block sensor! https://www.buckeyehydro.com/leakblock-sensor/

close the flush valve for normal operation, as well as to get a tds reading of the purified water. Make sure you let the system run for about 90 seconds before you test the tds

That carbon block is likely spec'ed at a flow of about 3.5 gpm for chlorine (not chloramine) treatment with a chlorine capacity of 12,000 gallons (meaning that after 12,000 gals it will be removing less than 50% of the chlorine). That flow is pretty slow for a whole house application but would...

There are four standard filter cartridge sizes - two lengths (10" and 20"), and two different diameters (2.5" and 4.5"). What sizes are your "whole house" filters?

https://www.buckeyehydro.com/mw102-pro-ph-temp-meter/

correctamundo.

https://www.buckeyehydro.com/water-storage-tanks/

Look for a schrader valve on the side of the tank - this is where you check (and add) air pressure to the tank.

This is a good point. It is easy to configure an RO system to output to both a pressurized container (like a pressure tank) and an unpressurized container (like a kettle). The water sent to an UNpressurized container will be more pure, and will be produced with much less water (concentrate)...

Hmm. That replacement cost seems way too high. Are you replacing your membrane every time you replace your other filters?