Editorial policy

Who writes this

Andrew Flores is responsible for the site's research, calculations, source verification, and corrections. A registered figure reaches a page through a named document and quoted evidence, 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 number carries a label

No figure appears on this site without being classified as sourced, derived, or assumed. A sourced figure carries a verbatim quote and a retrieval date. A derived figure shows its arithmetic. An assumed figure carries a disclosure sentence that is printed wherever the number is used, not filed away on a policy page.

This is enforced mechanically rather than by discipline. Pages fetch figures through a registry lookup that fails the build when an identifier has no entry, so a page cannot render an undocumented literal — the site simply does not build.

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 the single most commercially useful number we could 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

Outputs that depend on loose inputs are shown as ranges rather than single figures, and each tool names its own 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 in the data module rather than in page text, which means every page displaying an affected figure updates together and the methodology page updates with them. A figure whose cited source has changed is corrected and the correction recorded, rather than silently overwritten.

Figures carry a review-by date six months after retrieval. Reaching that date is a prompt to re-verify against the source, 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 build 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.