Magnetic anti-rotation device for pump access cover retainer

A method to block an access port of a pump, the method comprising:

• engaging a cover into the access port;
• restricting rotation of the cover with respect to the access port with an indexing device;
• rotatably engaging the cover with a retainer;
• engaging a key with the cover through a profiled keyway of the retainer;
• restricting rotation between the key and the cover with an anti-rotation mechanism;
• and
• restricting rotation between the key and the retainer with the profiled keyway.

An apparatus to block an access port of a pump, the apparatus comprising:

• a cover having a distal end and a proximal end, wherein the distal end is configured to be received into the access port;
• a first means for preventing rotation of the cover with respect to the access port;
• a first component of a second means for preventing rotation located upon the proximal end of the cover;
• a retainer configured to rotatably engage and abut the proximal end of the cover to resist removal of the cover from the access port;
• and
• a key to engage the proximal end of the cover through a profiled keyway of the retainer, wherein the key comprises a second component of second means for preventing rotation;
• wherein the profiled keyway is configured to restrict rotation of the key with respect to the retainer.