WDI B3210 side/top-entry toilet cistern fill valve with 10/15 mm tail and adjustable fill-level mechanism. Markings include WDI, B3210, EN 14124 and WaterMark AS 1172.2 / WMK26574. Used in compatible concealed and surface-mounted cisterns, including some Abacus and Robertson installations; it is not universal. Please compare the model number, threaded inlet, shape, dimensions and clips with your existing valve before ordering. Appears new and unused, supplied loose without retail packaging; untested because no suitable cistern is available. Includes the exact valve and loose retaining/adjustment pieces shown. UK postage is included in the eBay price.