It is difficult to provide a definitive answer as to how often one should change a water filter cartridge. This would depend on the water quality as well as water usage, but the average is usually every 2 to 4 months.
The Aprilaire filter should be changed every 6 to 12 months for optimal performance.
When it is dirty.
When it is dirty.
In order to maintain the highest quality, freshest taste, and cleanest water, the Aqua Water Filter needs to be changed every 2 months or every 200 liters.
Change the oil filter every time you change the oil.
It will depend on how often you use your Jenn Air cartridge. Typically it will need to be changed every 2-3 months, but heavy use will require quicker changeovers.
Pre-filter for what? You posted this question in the Fuel Filter category. So I must assume you mean the pre-filter on the fuel pump. That is changed when the fuel pump is replaced.
I recommend you change it every 75,000 miles.
The filter tank should last for years. However, the inside parts might last 3 to 8 yrs. depending upon whether the filter media is sand, DE ( the grids do degrade after about 8 yrs and will have to be replaced if torn or they have holes in them) or Cartridge elements.
An air purifier's filter should be changed every year, with the pre-filter cleaned or replaced every few months, depending on the conditions that the device operates in. Always follow the manufacturer's instructions.
The charcoal filter in a fish tank should be changed every 2-4 weeks to maintain water quality and keep the tank clean for the fish.
I have found that the filter should be changed around 90K in normal use and 60K in severe conditions. Toyota Tech.