How Often to Change Every Filter in Your House
A walk through every filter in a typical house, what actually governs each interval, why annually is usually the wrong answer, and the size trick worth doing once.
Guide
Home systems · HS-06
Water Softener Log
A free printable water softener log — salt top-ups, hardness tests, regeneration checks and servicing.
Download Free · no sign-up
One page. Choose your paper size — both versions are laid out identically, so neither one gets shrunk to fit.
Print it and write on it
Fill it in type and save
The fillable versions have real form fields — open them in any PDF reader, type into them and save. Printing help.
What this sheet is for
Keep a softener actually working, rather than discovering months later that it ran out of salt and the limescale came back.
Who it is for
Households with a water softener, particularly in hard water areas.
How to use it
- Record the incoming hardness and what the unit is set to.
- Log every salt top-up with the date.
- Test the softened hardness periodically and record it.
- Note servicing and any resin or valve work.
What is on the sheet
The layout is fixed at a size that fits both A4 and US Letter, so the A4 and Letter files are visually identical and print at full size on either. Rows are set at a height that an adult can actually write a date and a few words into with a pen — most printable tables are built in a word processor and never tested with one.
Read next
Private Well Water Testing Records
A single water test tells you about one moment at one tap. A run of results tells you what your supply actually does, and that is where the value is.
Guide
Related sheets
Water Heater Maintenance Log
Track the two jobs that decide how long a water heater lasts: flushing out sediment and replacing the sacrificial anode before it is gone.
HS-02 2 pages
Private Well Water Test Log
See how a private supply changes over years rather than judging it from one test, and keep the maintenance record alongside the results.
HS-05 2 pages
One new sheet, most weeks
We are building this library out steadily. Leave an address and we will send the new sheets as they are finished — nothing else, and no more than one email a week.
Sign-up is not live yet — we have not connected an email provider, so this form is switched off rather than quietly collecting addresses.