Help me understand...
I purchased a TDS measuring tool and did some measuring around the house with some contradictory results.
We live in Phoenix with hard water that as of the 2009 Water Quality Report states a Total Dissolved Solids (TDS) range of 518 to 676 ppm and a Total Hardness range of 166 to 305 ppm.
We have a United Standard Hydro-Quad HQ-1054 -1.5 water softener in place with the Fleck 5600 Econominder control valve. We believe the softening system is plumbed as a whole house softener.
The water at the sinks, showers, and faucets "feels" softened, but the TDS measurements indicate otherwise.
Here are the observations:
Water enter house at a TDS of 449 ppm and water after softening reads a TDS of 486 ppm ? ? ?
Water at the bathroom sinks read a TDS of 618 ppm and the shower at 655 ppm ? ? ?
Water at the bathroom toilet reservoir reads a TDS of 430 ppm ? ? ?
Water at the kitchen sink reads a TDS of 445 ppm ? ? ?
Running hot water only is a TDS 585 ppm ? ? ?
Water in the master suite measures TDS of 451 ppm at the sinks and a TDS of 473 ppm at the toilet ? ? ?
Measured with an HM Digital TDS-4TM with an accuracy of plus or minus 2%. Readings are corrected by the tool for temperature.
Shouldn't a functioning water softener reduce the TDS readings at all downstream points of measurement ?
How can the water "feel" softened and not be softened ?
By the way, TDS measurement on a R/O drinking water here shows 25 ppm, so calibration of the new TDS tester doesn't appear to be an issue.