How to handle this maintenance item
- Identify the exact filter system and cartridge stages.
- Follow the manufacturer interval for each stage rather than assuming every cartridge has the same life.
- Sanitize housings when instructed and check carefully for leaks after restart.
Before you start
Use the equipment manual and model-specific instructions as the primary source. Shut off power, water or fuel only when the manufacturer procedure calls for it and you are comfortable identifying the correct control. Stop if the condition you find is different from what the guide describes.
When to bring in a professional
Hire a qualified professional if you cannot safely access the equipment, find leaks/damage, cannot identify the correct part or shutoff, or the manufacturer instructions differ from this guide.