I wanted to repeat how pleased Pat and I are with the installation that your man David did here...
Nimbus Commercial Water Softener - TMI Series
Unlimited soft water supply 24 hours a day, 7 days a week In a class by itself, TMI is engineered for the most demanding light commercial and heavy residential needs. All water softeners require periodic regeneration when their softening capacity is exhausted. Conventional softeners can allow hard water to bypass the softener during regeneration.
The TMI Series features a twin mineral tank system governed by a meter initiated control valve. One softener tank is in service, delivering soft water, while the second softener tank is held in reserve. When the softening capacity of the service tank is exhausted, the control valve automatically switches the water flow to the reserve tank. The exhausted tank regenerates immediately and then becomes the reserve. This ensures a continuous supply of soft water without the risk of hard water getting into the service flow, making the TMI Series ideal for feed water pretreatment of commercial and industrial reverse osmosis systems.