Cleaning Your Rpez Kleen Filter — The Straight Version
A lot of people mess this up because they treat the cleaning process like a routine chore rather than something that actually depends on what the filter has been through. The Rpez Kleen Filter Cleaning Instructions are straightforward on paper, but the details matter if you want the filter to actually perform after cleaning. Here is how it goes. Turn off the system and relieve pressure by opening the bleed valve. Remove the filter housing according to the manufacturer's torque specs — overtightening the housing during reassembly is one of the most common errors I see, and it leads to seal leaks within a few weeks. Take the filter element out and inspect it. If it is a washable media type, rinse it with clean water at moderate pressure. Do not use a hose on max setting. You are trying to remove particulate, not damage the media structure. For stubborn buildup, soak the element in a warm water and mild detergent solution for about 20 minutes, then gently agitate and rinse thoroughly. Check the o-rings before putting anything back together. If they are cracked, flattened, or stiff, replace them. I once had a unit where the o-ring looked fine visually but had taken a permanent set from heat cycling. The filter passed the visual inspection, I reassembled it, and three days later there was a slow drip at the housing joint. Replacing the o-ring preemptively would have saved the downtime.
After cleaning, reinstall the element and housing. Hand-tighten first, then give it the recommended additional turn with the wrench. Do not force it. Prime the system slowly and check for leaks before returning it to full service pressure. The whole process should take between 15 and 30 minutes depending on how dirty the filter is. If it takes longer, you are probably struggling with something that should have been replaced, not cleaned. One thing the instructions sometimes undersell is the difference between a mechanically clean filter and a functionally clean one. Surface debris comes off easily. Biofilm or scaled deposits inside the media layers do not come off with a rinse. If your water has high hardness or you are filtering from a well source, you may see the flow rate drop back to pre-cleaning levels even after a thorough wash. In that case the media is exhausted internally and no amount of additional cleaning will restore it. That is not a defect in the cleaning procedure. It is just the nature of the media. For heavily soiled filters, a second cleaning cycle after a 10-minute air dry in between can help, because re-wetting dried particulate makes it harder to dislodge. I learned that one the hard way on a residential well system where the filter had gone about six weeks between cleanings due to a supply issue. The first rinse took off the loose stuff but the flow remained restricted. Drying it out and running a second cycle brought the flow back to normal.
The only real downside to this approach is that it is only viable for washable filter elements. If you are using a disposable paper or polypropylene spin-on type, cleaning is not recommended and the manufacturer warranty typically does not cover it. You also cannot clean a filter that has been exposed to chemical contaminants — oil, solvent, or corrosive substances. The media becomes compromised and should be disposed of. There is no workaround for that. If you find yourself cleaning the same filter more than twice in a month under normal conditions, your upstream pre-filtration is likely inadequate or your maintenance schedule is off. Fixing the root cause is faster and cheaper than perpetually maintaining an overloaded filter.
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