Decisions · 5 min
When to call a water treatment pro (not DIY)
Cartridge changes are DIY. Sizing iron systems, UV on cloudy water, flooded wells and multi-stage trains deserve a vetted installer.
- Author
- WaterFilterHelp Editorial Team
- Canadian home-water research and consumer education
- Reviewed by
- WaterFilterHelp Standards Review
- Fact-checked against official Canadian guidance and certification sources
- Last reviewed
- 2026-08-23
Looking for a lab or free test option? Find a Water Test · Already have results? Explain your water test · Not sure which system you need? Run the Water Problem Wizard.
Fine for DIY
- Replacing under-sink cartridges on schedule
- Adding softener salt
- Basic TDS checks on RO product water
Call a pro
- Designing iron, sulphur or multi-tank systems
- Positive bacteria tests or flood recovery
- Pressure loss, leaks or electrical for UV
- Choosing between softener, filter and RO stacks
How WaterFilterHelp helps
We do not sell shared leads. Your request goes to one vetted Canadian contractor. Start with the Water Problem Wizard or the free quote form.