The Aprilaire filter should be changed every 6 to 12 months for optimal performance.
When it is dirty.
When it is dirty.
Only need drained when water in fuel light comes on. Filter needs changed every 15,000 miles or once a year.
Change the oil filter every time you change the oil.
usually fuel filters should be changed once a year theres ur answer Or, if you want the real answer; The 99 Durango doesn't have a filter that can be changed. It is part of the fuel pump, and I don't recommend changing the fuel pump anually.
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.
Every 15,000 miles.
I recommend you change it every 75,000 miles.
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.