The Need Release Filter claims to be able to be changed once per year, is it similar to the WF2121?
The NRF product uses magnesium plates that dissolve into the coolant thereby releasing the SCA charges. There are three large tablets in the NRF. WF2121 has numerous small pellets that are coated with a coolant permeable substance that allows slow release over time without adding contaminants to the system unlike the NRF product. Our pellets stick together to form a clump that slows the release of chemical into the coolant thus providing the “time release”.
