Why do some models end in ‘D’ and ‘FM’?

Aquasure Support
Aquasure Support


Every size water softener we offer will come with either standard resin or fine mesh resin.


‘D’ refers to standard resin 


‘FM’ refers to fine mesh resin


The amount of iron in your water will determine if you need a ‘D’ model or an ‘FM’ model. 


Standard resin can handle up to 2ppm of iron.


Fine mesh resin can handle up to 10ppm of iron.