# OwnerSpec

> Independent specs, sizing and part-compatibility answers for home equipment. No vendor owns the numbers here.

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|---|---|
| Source | https://ownerspec.com/ |
| Publisher | OwnerSpec (https://ownerspec.com/) |
| Published | 2026-09-15 |
| Updated | 2026-09-15 |

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Most equipment questions have one correct answer and it is a number. How many grains of
capacity for four people on 22 gpg water. What micron rating a sediment filter needs on a
well. Which cartridge fits a housing you already own.

Those answers are usually published by whoever wants to sell you the hardware. OwnerSpec
publishes them independently: the formula, the inputs, the working, and the source it came
from, so you can check it rather than trust it.

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Citation: OwnerSpec, "OwnerSpec", https://ownerspec.com/, updated 15 September 2026.
Reuse: quoting with attribution and a link is permitted. See https://ownerspec.com/legal/terms/.