GHL doser 2.0 vs 2.1?

[tmccaf]

I am trying to find out the difference. I was told the 2.1 is for like everyday use like AWC and 2.0 is good for KH director; Ion Director thanks

[Vinny]

Hi,

Both 2.0 and 2.1 are suitable for AWC to an extent and the KHD.

The difference is in the pump head design. Features remain the same.