Editorial standards

• Accuracy first: every specification comes from the maker's or seller's published information.
• Flow, head, filter area, rated gallons and heating output are the maker's own; calculators show their assumptions.
• Cross-references are shown only where the maker or the listing names the part it replaces; check the part number on your own equipment.
• Electrical connections, gas lines and bonding are flagged as jobs for a licensed electrician or installer where the maker or code requires it.
• Discontinued products are removed or clearly labelled, never recommended.
• Commissions never decide which products we cover or how we rank them.

Corrections

If you spot an error, email [email protected]. We correct the source record, then every page that uses it.

Updated October 2026.