RO/DI Q's

[reef_doug]

1. I have a Kent Marine 4stage Hi-S, no pressure regulator. When connected to the hose there is a high pitch hum going through the pipes in the house, almost like there is pressure in the pipes that wants to be released. When I turn on a facuet while the RODI is running, the pitch goes away.

Anyone experience the high pitch hum?
Anyway to reduce the noise?

2. I have a TDS meter, Hanna hand held. The source is 115 and the output is 1. Are these typical readings?

3. If the TDS reading is above 3, then I would replace the micron filter. Would the TDS meter give any indication when to change the carbon filter?

Thanks
Doug

 

[AZDesertRat]

The TDS meter tells you when to replace the RO membrane and the DI resin not the prefilter or carbon block. You always change those at 6 months intervals regardless of usage. One way to help tell the condition of the pre and carbon is with a pressure gauge before the membrane, when you experience a significant pressure drop from your original reading its time to change them even if its less than 6 months.
If your tap is 115 you should be seeing about 2 or 3 tops from the RO only without DI and 0 after DI.

 

[reef_doug]

^ any suggestions about the high pitched hum from the pipes?

 

[AZDesertRat]

Does the spigot have a hose bib vacuum breaker/backflow device screwed on to it? I know whenever I use a hose nozzle on my outsdie bibs with breakers on them they squeal and vibrate when the nozzle is off or flowing slowly.

 

[reef_doug]

Nope, I don't think so.

It just a faucet outside, the house is only 3 years old.

Thanks

 

[AZDesertRat]

If its only 3 years old it should have vacuum breakers on all the hose bibs to meet current plumbing codes.