all it is a water filter that is mounted between the water pump/city water inlet and the faucets.
on entry-level RV's, like the Puma, this is any option, whereas it's a standard item on other RV's.
they usually not much different than the ones you find at HD or Lowe's and don't require any electricity. just water pressure, like at your house.
they use the same cartridges that the home ones use.
works on city water hookups or using water from your FW tank.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC