I installed several Nova filters which have pressure gauges, all were 60-70 PSI.
Sounds like debris in line, it will work it's way out more than likely.
As far as changing the cartridges, if you are changing them every 5/6 weeks that is a residential small filter cartridge.
Our Nova filters will last 9-12 months.
Can't compare residential to commercial grade, it less expensive in cartridge changes because there are three large ones.
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Nova Water filters
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