A whole-house filter installation checklist should establish what must be agreed, inspected and handed over. It cannot replace the selected system’s plumbing instructions. Do not cut the main line from a generic sequence that omits your pipework, local requirements or treatment design.
Before installation day
Confirm the exact system and approved consumables, its documented treatment duty and the outlets it will serve. Ask the installer to identify required permits or inspections, compatible pipe connections, equipment support and any pressure-control, drain or electrical work. Local requirements vary; obtain them for the actual address.
| Agree in writing | Why it prevents a later dispute |
|---|---|
| Treatment and outlet scope | “Whole-house” may exclude specific branches |
| Total installed price | Valves, drainage, fittings or electrical work may be separate |
| Water interruption and interim use | Bypass water may not be suitable for the intended use |
| Service clearance | The unit must be maintainable after storage is returned |
| Commissioning procedure | Clear water alone does not establish correct startup |
| Responsibility after a leak or alarm | Household and installer know who responds |
If an existing shutoff is unreliable or pipework needs repair, resolve that in the job scope. A filter should not conceal an existing plumbing fault.
Inspect against the actual manual
During handover, identify the inlet and outlet, isolation controls, support, pressure limits and replacement access. Confirm that materials and connections match the installation instructions. If the job alters metallic piping used in an electrical bonding arrangement, have the appropriate qualified professional assess it; do not improvise an electrical solution.
For a backwashing or RO system, verify the documented drain arrangement and required safeguards. For powered equipment, confirm compliant electrical provision and explain any alarms. Not every cartridge system needs the same utilities.
Request a commissioning record
The record should state the installed model, serial number, cartridge/media codes, startup date and completed flushing or sanitation steps. Include relevant operating measurements and any required water testing. Ask for the final valve positions and treatment route to be labeled.
Do not accept “flush until clear” as a substitute for a manufacturer-specified volume, time or sanitation procedure. The acceptance criteria depend on the actual equipment and treatment purpose.
Leave with a usable service pack
Keep the manual, invoice, warranty registration where applicable, approved replacement list and service contact together. Ask the installer to demonstrate the emergency shutoff and explain when untreated water must not be used. Book only the service intervals the equipment and water conditions require.
Use our placement worksheet before the visit and housing readiness gates before later cartridge work. NSF’s claim guidance helps define the promised treatment outcome; it is not an installation code or a model-specific manual.
Compare possible installation positions before finalizing the installer brief .