High flow drain control

A lockable plug device for sanitary ware, the lockable plug device comprises:

• a closure member operable to sealingly engage with an outlet or drain of a sanitary ware product;
• and
• a closure mechanism, wherein the closure mechanism is linked to the closure member and is operable to displace the closure member relative to the outlet to open and close the outlet;
• and wherein the closure mechanism comprises a lock feature, which is operable to lock the closure member in an open position;
• wherein the closure mechanism comprises a primary lever and a secondary lever, each comprising an upper end and a lower end;
• wherein the upper end of the primary lever engages with the upper end of the secondary lever to control movement of the closure member via the lower end of the secondary lever,
• wherein the lower end of the primary lever provides a load point, which is operable to rotate the primary lever about a pivot point thereby creating displacement of the upper end of the primary lever and consequential displacement of the upper end of the secondary lever wherein the primary and secondary levers are operable to move to a locked open position, wherein the upper ends of the primary and secondary levers are configured to resist rotational displacement caused by a closing force generated by water flowing through the outlet or the drain
• wherein the upper end of the secondary lever comprises a slot and the upper end of the primary lever comprises a pin, wherein the pin engages with the slot such that upon rotation of the primary lever relative to the secondary lever the pin is displaced translationally along the slot to an extremity of the slot, wherein rotation of the secondary lever relative to the primary lever displaces the closure member to a locked open position when the pin reaches an extremity of the slot;
• and
• the upper end of the secondary lever comprise a recess adjacent to the slot, wherein the recess is shallower than the slot, such that a step is defined to one side of the slot, wherein the step acts as a guide for the upper end of the primary lever to adopt a position associated with the closure member being fully open and an edge of the recess acts as a guide for the upper end of the primary lever in the event that a load, which is greater than the load generated by water flowing through the outlet or the drain, is applied to the closure member whilst in the locked open position.