Editorial policy

Who writes this

Andrew Flores, working alone, with AI assistance used for drafting and checking and never as a source. He runs this site and answers for corrections to it. A registered figure reaches a page through a named source checked against a saved copy, documented arithmetic, or a visibly labeled assumption.

The publisher of record is Nathan Management, in California. Naming the author belongs in the policy rather than in a footnote, because a standard nobody is answerable for is not a standard.

Every registered number carries a label

Every registered figure is classified as sourced, derived, or assumed, and registered figures cannot reach a page without an entry. The four sourced figures name their source and the date of the saved copy they were checked against; a sentence from a source is shown as a quotation and a value read from a table as transcribed cells. A derived figure shows its arithmetic. An assumed figure carries a disclosure sentence, printed on the tool page that exposes it, not filed away on a policy page.

Screening thresholds and range widths used inside the calculators are listed, with their labels, on the methodology page.

We would rather have a hole than a guess

Where a figure cannot be sourced honestly, the site does not invent a plausible one. It either asks the visitor for their own local number or states plainly that no defensible figure exists and explains why.

This is most visible on cost. A national installed-price average would be a commercially useful number to publish, and we have declined to publish it, because it would be an aggregate presented as personal guidance. The methodology page lists every such refusal with its reasoning.

Uncertainty is stated, not hidden

Several outputs that depend on loose inputs are shown as ranges rather than single figures, with the range width labelled, and the main tools name their biggest swing factor on the page. Where a result excludes something material, the exclusions are listed next to the number rather than in small print.

Nothing here is a guarantee, and the site does not use the language of guarantees. A calculator that produces a confident single figure from uncertain inputs is misrepresenting its own reliability.

No paid placement, no product ranking

There is no arrangement under which a manufacturer, retailer, or contractor can influence content. The site does not rank pump models, because we hold no independent reliability evidence and inventing a ranking would be exactly the kind of authority-without-basis this policy exists to prevent.

Where a pump characteristic genuinely matters — flow at a stated head — the site tells you to read the manufacturer's own published curve, which is a verifiable document rather than an opinion.

How errors are handled

Corrections are made once and every page using the figure updates, including the methodology page. When a cited source changes, the figure is corrected or re-sourced and the change is recorded in the update log rather than silently overwritten.

Sourced figures carry a review-by date six months after the saved copy they are checked against. Reaching that date is a prompt to check the source again, not a licence to leave the number in place.

If you find an error, the contact page explains what makes a correction easy to act on.

Advertising

This site carries no advertising code and no consent-management script. If that changes, this page and the privacy policy will be updated in the same deployment that introduces it — the policy describes what is actually being served on the day it is served, never what is planned.