Whole House Water Filtration Systems

Frequently Asked Questions

What size filter unit do I need for a whole house water filtration system?

For most whole house water systems, a good choice is the 4.5" Big Blue 10" or 20" units installed on the main plumbing entry to a home. The larger size allows higher flow and longer life for sediment and carbon cartridges.

Do I need a professional to install a whole house filtration system with these components?

If you’re comfortable with plumbing (cutting pipe, installing shut-off valves, using Teflon tape), you can often install a small whole house filtration system yourself. For well water or more complex cottage water filtration systems, many homeowners prefer a licensed plumber or water treatment professional.

How often should I change the filters inside these units?

It depends on water quality and usage, but for a typical whole home water filtration system in Canada:

• Sediment cartridges: replacement intervals of 3, 6 or 12 months
• Carbon cartridges: replacement intervals of  6–12 months

 Replace sooner if you notice a drop in water pressure or a return of odour/taste.