Source before answer
Core identity and compatibility facts start with manufacturer product pages, manuals, support articles and exact accessory listings. Store collection pages may help locate a SKU, but they do not override a product-specific source.
- T1: first-party product, manual, support or accessory evidence
- T1R: regulatory, recall or standards evidence
- T2: authorized commerce and offer data
- T3–T5: corroboration, discovery and reviewed original evidence
Four public truth states
Confirmed requires explicit first-party support for the exact relation and scope. Corroborated means reliable evidence aligns but leaves a bounded gap. Not compatible requires an explicit exclusion or a verified blocking rule. Unknown means the evidence is insufficient or conflicting.
Identity and scope stay attached
We do not silently transfer facts between Gen 2, CurvX, refill-and-drainage, water-tank or regional variants. The absence of a model from an accessory list never proves incompatibility.
Publication standard
A public page must answer the task early, show its scope and evidence, remain useful without JavaScript, have crawlable internal links and avoid unsupported commercial claims. Pages that do not meet this standard are not published.