What is a Demand Regeneration System?

These systems monitor actual usage and regenerate as needed instead of on a set schedule.  This usually uses less water and salt to clean the system and therefore saves money.  It also ensures that treated water is always available.

What is the advantage of a twin tank unit?

Twin-tank demand units normally are considered when water usage requirements will be high.  The additional tank allows for continuous soft water as one tank cleans itself, the other provides treated water. This allows the system to keep up with heavy demand.

When should a custom system be considered over a standard unit?

In some cases space requirements may be a factor, in others, it may be your water conditioning requirements may require special media for filtering.  In most cases custom systems are needed to handle high volume water processing needs that standard units are not designed to handle.