How to Install a Whole House Filter

DIY vs Professional Installation

Unlike under-sink filters, whole house systems typically require significant plumbing work. Most homeowners hire a plumber.

Consider professional installation if:

• You're not comfortable cutting into your main water line
• You have copper pipes that need soldering
• Local codes require permits or licensed work
• You want the warranty to remain valid (some require professional install)

DIY may work if:

• You have PEX or easily accessible plumbing
• You're comfortable with significant plumbing projects
• You have someone experienced to help

Installation Location

Whole house filters install at the "point of entry"—where the main water line enters your home.

What Installation Involves

1. Shut off main water supply
2. Cut into main line — This is the hard part. Requires pipe cutter and proper fittings.
3. Install bypass valve — Allows water flow when changing filters or servicing system.
4. Mount filter housing — Usually on wall near main line.
5. Connect inlet and outlet — With appropriate fittings for your pipe type.
6. Install pressure gauges — Help monitor filter condition (optional but recommended).
7. Flush and test — Run water through system, check for leaks.

Installation Costs

• Professional installation: $200-500 for basic systems, $500-1,000+ for complex setups
• Permits (if required): $50-150
• Additional plumbing: Variable if pipes need modification

Well Water Considerations

Well water systems are more complex and often include:

• Sediment pre-filter
• Iron/sulfur treatment (if needed)
• Main filtration system
• UV disinfection (if bacteria is a concern)
• Water softener (if hard water)

These components install in sequence and may require professional sizing and setup.