How We Research, Score and Rank Every Toilet

Step 1: We gather verified data, not marketing claims

Every toilet evaluation starts with three independent data sources:

• MaP flush-test scores — The Maximum Performance (MaP) test, developed by the Canadian National Research Council and funded by utilities, measures how many grams of solid waste a toilet clears in a single 1.28-gallon flush. Scores range from 250g (minimum to pass) to 1000g (maximum). We pull scores directly from map-testing.com, the official registry.
• Published manufacturer specifications — Trapway diameter, flush valve size, bowl height, rough-in, water consumption (GPF), and certifications like EPA WaterSense.
• Aggregated owner reviews — We collect verified-purchase reviews from Amazon, Home Depot, Lowe's, and manufacturer sites. We weight volume and recency, and flag products with fewer than 50 verified reviews.

Step 2: We score every toilet on 5 weighted criteria

Every toilet earns an overall rating built from five performance pillars. We weight them to reflect what matters most in daily use:

Why flush power is weighted highest: A toilet exists to clear the bowl cleanly in one flush. If it cannot do that reliably, no amount of style, efficiency, or price savings compensates. Flush power and clog resistance together account for 55% of every score.

Step 3: We compare, rank, and explain our reasoning

Rankings are built by sorting products within their category (e.g., one-piece, dual-flush, pressure-assisted) by overall weighted score. When two toilets score within one point of each other, we note the tie and highlight the tradeoffs rather than forcing a false ranking.

Every review and buying guide explains why a toilet scored the way it did. We show the underlying numbers — MaP score, GPF, trapway width — so you can verify our reasoning yourself.

What we will never do

• Accept payment for placement or rankings
• Fabricate first-person testing claims — we do not operate a physical test lab
• Publish a score without citing where the data came from
• Let affiliate commissions influence which product ranks higher

How we handle affiliate links

As an Amazon Associate, Best Flushing Toilets earns from qualifying purchases. We may earn a commission when you buy through links on this site, at no extra cost to you. Affiliate commissions never influence our rankings, scores, or recommendations. Every product recommendation is based solely on the scoring criteria above.

How often we update

We review every buying guide and product ranking at least once per quarter. When a manufacturer releases a new model, updates a spec, or a MaP test result changes, we update the affected pages within two weeks. Every page shows a "Last reviewed" date so you know how current the information is.