Phoenix water filters are designed to withstand extreme cold and heat.
Coolant system filters are typically partial flow. Coolant systems are referred to as closed loop systems where the filter operates in a side loop of the main flow. This means that a small percentage of the flow passes through the filter, which is designed to capture large contaminants.
Coolant filters for maintaining additive levels have an internal baffle with a small hole to control the rate of additive chemical release into the system. The chemical additive in Phoenix water filters restores the PH balance of the water without damaging the system. This is why it is important to use the right filter.