If you have an under-sink filter in a St. Louis kitchen, the paperwork that came with it is easy to lose. A receipt, a warranty card, and a sticky note with a filter change date can end up in a junk drawer within a year. When something goes wrong, or when you sell the house, those papers matter. This guide covers what to keep, where to keep it, and how to make the record easy to find.
Why a Simple Folder Helps
Most homeowners only go looking for the paperwork when a filter stops working or a service call needs proof of purchase. A single folder, physical or digital, lets you answer questions quickly. Who installed the unit? When was the last filter change? Which parts does the warranty cover? Having those answers ready saves time with a seller, an installer, or anyone who asks about the work done in your home.
Documents to Keep
- The original purchase receipt or order confirmation
- The warranty card or printed warranty terms, including what is covered and for how long
- The installation invoice, if a professional did the work
- Any permit or inspection record tied to the work, if one was required
- The manual, including the model name and replacement filter part names
- A replacement log with dates and which filters were changed
- Photos of the setup taken after installation, showing the faucet, the housing, and the drain connection
Build a Simple Log
A log does not need special software. A notebook taped inside the cabinet door works, and so does a note on your phone. For each service visit, write the date, the work done, the part names, and who did it. If you changed a filter yourself, note that too. Warranty claims often depend on proof that maintenance happened on schedule, so a steady log is useful.
Store Paper and Digital Copies Separately
Paper can fade, tear, or get damp in a basement or under a sink. Keep the original in a plastic sleeve in a dry drawer away from the sink, then scan or photograph each page. Save the digital copies in two places, such as a cloud folder and a backup drive. Name files clearly, for example with the year of purchase, the item, and the word warranty, so you can find them quickly.
Know Which Parts Carry Coverage
Warranty terms often treat the housing, the membrane or core, the faucet, and the replacement filters differently. Some parts may be covered only for the original owner, and some may require proof that the recommended maintenance was done. Read the terms once and write a short summary on the first page of your folder. Note which parts need proof of maintenance and which need a specific type of replacement part.
Renters and Home Sales
If you rent in St. Louis, ask your landlord whether the unit came with paperwork and who holds it. Keep your own copies of anything you add. When you sell, a buyer or agent may ask whether the system is transferable, who owns it, and what maintenance was done. A tidy folder answers those questions and makes the home easier to show.
A Quick Checklist
- Gather the receipt, warranty, manual, and any installation invoice.
- Write a one-page summary with the install date, model name, and replacement part names.
- Start a replacement log and record the next change date.
- Scan or photograph every page and save copies in two places.
- Store the paper originals in a dry, labeled folder away from the sink.
- Review the warranty terms each year and update the log.
When to Ask for Help
If a document is missing, contact the seller or the installer and ask for a copy. If the warranty terms are unclear, ask the manufacturer's customer support to explain them in writing, and keep that reply with your folder. This guide is general information for homeowners in St. Louis, not legal or warranty advice, so follow the printed terms for your specific unit.