Quick answerShark ION Robot Pre-Motor Filter (SKU 1172FK870) is officially compatible with RV850, RV851WV, RV871, and RV871R.
We checked and could not confirm either way — this is a real answer, not a gap. Don't assume compatibility for these.
SharkNinja official product page for the RV850-generation filter (1172FK870) gives an exact compatible-model list that does NOT include this model. We had previously cited the generic parts-support catalog page (which lists no per-product exact compatibility) and wrongly extended the RV850/851WV/871/871R exact list to this whole "RV850-991" family grouping. Downgraded per this site's exact-list-over-series-name rule.
SharkNinja official product page for the RV850-generation filter (1172FK870) gives an exact compatible-model list that does NOT include this model. We had previously cited the generic parts-support catalog page (which lists no per-product exact compatibility) and wrongly extended the RV850/851WV/871/871R exact list to this whole "RV850-991" family grouping. Downgraded per this site's exact-list-over-series-name rule.
SharkNinja official product page for the RV850-generation filter (1172FK870) gives an exact compatible-model list that does NOT include this model. We had previously cited the generic parts-support catalog page (which lists no per-product exact compatibility) and wrongly extended the RV850/851WV/871/871R exact list to this whole "RV850-991" family grouping. Downgraded per this site's exact-list-over-series-name rule.
SharkNinja official product page for the RV850-generation filter (1172FK870) gives an exact compatible-model list that does NOT include this model. We had previously cited the generic parts-support catalog page (which lists no per-product exact compatibility) and wrongly extended the RV850/851WV/871/871R exact list to this whole "RV850-991" family grouping. Downgraded per this site's exact-list-over-series-name rule.
SharkNinja official product page for the RV850-generation filter (1172FK870) gives an exact compatible-model list that does NOT include this model. We had previously cited the generic parts-support catalog page (which lists no per-product exact compatibility) and wrongly extended the RV850/851WV/871/871R exact list to this whole "RV850-991" family grouping. Downgraded per this site's exact-list-over-series-name rule.
SharkNinja official product page for the RV850-generation filter (1172FK870) gives an exact compatible-model list that does NOT include this model. We had previously cited the generic parts-support catalog page (which lists no per-product exact compatibility) and wrongly extended the RV850/851WV/871/871R exact list to this whole "RV850-991" family grouping. Downgraded per this site's exact-list-over-series-name rule.
SharkNinja official product page for the RV850-generation filter (1172FK870) gives an exact compatible-model list that does NOT include this model. We had previously cited the generic parts-support catalog page (which lists no per-product exact compatibility) and wrongly extended the RV850/851WV/871/871R exact list to this whole "RV850-991" family grouping. Downgraded per this site's exact-list-over-series-name rule.
SharkNinja official product page for the RV850-generation filter (1172FK870) gives an exact compatible-model list that does NOT include this model. We had previously cited the generic parts-support catalog page (which lists no per-product exact compatibility) and wrongly extended the RV850/851WV/871/871R exact list to this whole "RV850-991" family grouping. Downgraded per this site's exact-list-over-series-name rule.
SharkNinja official product page for the RV850-generation filter (1172FK870) gives an exact compatible-model list that does NOT include this model. We had previously cited the generic parts-support catalog page (which lists no per-product exact compatibility) and wrongly extended the RV850/851WV/871/871R exact list to this whole "RV850-991" family grouping. Downgraded per this site's exact-list-over-series-name rule.
SharkNinja official product page for the RV850-generation filter (1172FK870) gives an exact compatible-model list that does NOT include this model. We had previously cited the generic parts-support catalog page (which lists no per-product exact compatibility) and wrongly extended the RV850/851WV/871/871R exact list to this whole "RV850-991" family grouping. Downgraded per this site's exact-list-over-series-name rule.
SharkNinja official product page for the RV850-generation filter (1172FK870) gives an exact compatible-model list that does NOT include this model. We had previously cited the generic parts-support catalog page (which lists no per-product exact compatibility) and wrongly extended the RV850/851WV/871/871R exact list to this whole "RV850-991" family grouping. Downgraded per this site's exact-list-over-series-name rule.
SharkNinja official product page for the RV850-generation filter (1172FK870) gives an exact compatible-model list that does NOT include this model. We had previously cited the generic parts-support catalog page (which lists no per-product exact compatibility) and wrongly extended the RV850/851WV/871/871R exact list to this whole "RV850-991" family grouping. Downgraded per this site's exact-list-over-series-name rule.
SharkNinja official product page for the RV850-generation filter (1172FK870) gives an exact compatible-model list that does NOT include this model. We had previously cited the generic parts-support catalog page (which lists no per-product exact compatibility) and wrongly extended the RV850/851WV/871/871R exact list to this whole "RV850-991" family grouping. Downgraded per this site's exact-list-over-series-name rule.