How often should you replace the heads?

[Whostheduke]

Hi guys,

Is it recommended to replace the heads every year on the 2.1 doser? Or is that only necessary if the heads fail?

Thanks,

Alex.

[Vinny]

Setting yourself up with a regular maintenance and replacement schedule will be much better than waiting for parts to fail. ;)

Replacing every year is fine.

[Whostheduke]

Thanks :)