Whole House Water System using P5-20 Filters

[langua]

For my whole house water system I've been using (ordering) the P5-20 filters and noticed that the P1-20 is the same size and will filter down to 1 micron. Also, if I'm reading the charts correctly, it looks like the flow rate is the same for both.
What's the upside/downside of the P1 versus the P5? Maybe having to change the P1 more frequently?
My water source is a natural spring and contains fine dirt and sand particles (and lord knows what else). I change the filter every 1-2 months.
Out of the filter I have an ultraviolet.
Maybe the P5 is perfectly adequate...what'd you think?

[waterfilters]

The P1 will fill up quicker than the P5, but people don't really consider that a downside since you want to filter out all the sediment possible anyway. The P1 can have a slightly larger pressure drop, but generally it is insignificant.

I would recommend 1 micron over 5. You will definitely catch more sediment.

What type of UV system do you have? Here is ours. We have the replacement lamps also.
UltraViolet Water Filtration Systems and Ultra Violet lamps for water disinfection

You'll notice that the largest UV system also holds a carbon filter that helps with some contaminants such as bacteria, so you remove them instead of just kill them with the UV.

Thank you,
WaterFilters.NET