Filter Cartridge Life by Rated Gallons and Household Use
How long a rated cartridge lasts at each level of household use, why the rating is an upper bound rather than a schedule, and why pressure drop is the only trigger worth acting on.
Every page below is computed rather than written, from the same formulas the matching calculator uses, so a figure on a chart page and the same figure in the calculator cannot disagree. Each one carries its working, the basis of every number it prints, and equipment chosen by those numbers rather than from a general list.
- How long does a 2,000 gallon cartridge last at 100 gallons a day? A 2,000 gallon rated cartridge at 100 gallons a day lasts about 0.7 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 2,000 gallon cartridge last at 150 gallons a day? A 2,000 gallon rated cartridge at 150 gallons a day lasts about 0.4 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 2,000 gallon cartridge last at 200 gallons a day? A 2,000 gallon rated cartridge at 200 gallons a day lasts about 0.3 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 2,000 gallon cartridge last at 250 gallons a day? A 2,000 gallon rated cartridge at 250 gallons a day lasts about 0.3 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 2,000 gallon cartridge last at 300 gallons a day? A 2,000 gallon rated cartridge at 300 gallons a day lasts about 0.2 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 2,000 gallon cartridge last at 400 gallons a day? A 2,000 gallon rated cartridge at 400 gallons a day lasts about 0.2 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 5,000 gallon cartridge last at 100 gallons a day? A 5,000 gallon rated cartridge at 100 gallons a day lasts about 1.6 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 5,000 gallon cartridge last at 150 gallons a day? A 5,000 gallon rated cartridge at 150 gallons a day lasts about 1.1 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 5,000 gallon cartridge last at 200 gallons a day? A 5,000 gallon rated cartridge at 200 gallons a day lasts about 0.8 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 5,000 gallon cartridge last at 250 gallons a day? A 5,000 gallon rated cartridge at 250 gallons a day lasts about 0.7 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 5,000 gallon cartridge last at 300 gallons a day? A 5,000 gallon rated cartridge at 300 gallons a day lasts about 0.6 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 5,000 gallon cartridge last at 400 gallons a day? A 5,000 gallon rated cartridge at 400 gallons a day lasts about 0.4 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 10,000 gallon cartridge last at 100 gallons a day? A 10,000 gallon rated cartridge at 100 gallons a day lasts about 3.3 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 10,000 gallon cartridge last at 150 gallons a day? A 10,000 gallon rated cartridge at 150 gallons a day lasts about 2.2 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 10,000 gallon cartridge last at 200 gallons a day? A 10,000 gallon rated cartridge at 200 gallons a day lasts about 1.6 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 10,000 gallon cartridge last at 250 gallons a day? A 10,000 gallon rated cartridge at 250 gallons a day lasts about 1.3 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 10,000 gallon cartridge last at 300 gallons a day? A 10,000 gallon rated cartridge at 300 gallons a day lasts about 1.1 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 10,000 gallon cartridge last at 400 gallons a day? A 10,000 gallon rated cartridge at 400 gallons a day lasts about 0.8 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 15,000 gallon cartridge last at 100 gallons a day? A 15,000 gallon rated cartridge at 100 gallons a day lasts about 4.9 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 15,000 gallon cartridge last at 150 gallons a day? A 15,000 gallon rated cartridge at 150 gallons a day lasts about 3.3 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 15,000 gallon cartridge last at 200 gallons a day? A 15,000 gallon rated cartridge at 200 gallons a day lasts about 2.5 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 15,000 gallon cartridge last at 250 gallons a day? A 15,000 gallon rated cartridge at 250 gallons a day lasts about 2.0 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 15,000 gallon cartridge last at 300 gallons a day? A 15,000 gallon rated cartridge at 300 gallons a day lasts about 1.6 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 15,000 gallon cartridge last at 400 gallons a day? A 15,000 gallon rated cartridge at 400 gallons a day lasts about 1.2 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 20,000 gallon cartridge last at 100 gallons a day? A 20,000 gallon rated cartridge at 100 gallons a day lasts about 6.6 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 20,000 gallon cartridge last at 150 gallons a day? A 20,000 gallon rated cartridge at 150 gallons a day lasts about 4.4 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 20,000 gallon cartridge last at 200 gallons a day? A 20,000 gallon rated cartridge at 200 gallons a day lasts about 3.3 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 20,000 gallon cartridge last at 250 gallons a day? A 20,000 gallon rated cartridge at 250 gallons a day lasts about 2.6 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 20,000 gallon cartridge last at 300 gallons a day? A 20,000 gallon rated cartridge at 300 gallons a day lasts about 2.2 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 20,000 gallon cartridge last at 400 gallons a day? A 20,000 gallon rated cartridge at 400 gallons a day lasts about 1.6 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 30,000 gallon cartridge last at 100 gallons a day? A 30,000 gallon rated cartridge at 100 gallons a day lasts about 9.9 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 30,000 gallon cartridge last at 150 gallons a day? A 30,000 gallon rated cartridge at 150 gallons a day lasts about 6.6 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 30,000 gallon cartridge last at 200 gallons a day? A 30,000 gallon rated cartridge at 200 gallons a day lasts about 4.9 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 30,000 gallon cartridge last at 250 gallons a day? A 30,000 gallon rated cartridge at 250 gallons a day lasts about 3.9 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 30,000 gallon cartridge last at 300 gallons a day? A 30,000 gallon rated cartridge at 300 gallons a day lasts about 3.3 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
- How long does a 30,000 gallon cartridge last at 400 gallons a day? A 30,000 gallon rated cartridge at 400 gallons a day lasts about 2.5 months. Why the gallons rating is an upper bound and why pressure drop is the real change trigger.
Researched, not professional advice. Every figure on these pages is labeled as a published standard, a trade rule of thumb, or something that can only come off your own water test. Where a published figure does not exist we say so rather than estimating one. Test your water before you buy equipment: on city water start with the Consumer Confidence Report your utility publishes each year, and on a private well only a certified laboratory test tells you what you have. Bacteria, nitrate, lead, arsenic and PFAS are not do it yourself topics and need a laboratory and usually a licensed professional.