Self-cleaning pre-filter for a water circulation pump

An apparatus kit comprising:

• a screen cage (80) comprising an inner surface (1800) and an outer surface (1605), wherein the screen cage (80) has a screen cage entry side configured for traversing the inner surface (1800) and the outer surface (1605);
• a backwash pipe (1500) comprising a hollow structure having an open proximal end (1500A) and a closed distal end (1500B), wherein the backwash pipe (1500) is configured to run through the screen cage entry side, and terminate at another location away from the screen cage entry side within the screen cage (80) interior, further wherein the backwash pipe (1500) fits within the screen cage (80) interior and wherein the screen cage entry side is configured to be rotationally fixed with respect to the backwash pipe (1500);
• and
• at least one inner nozzle (1700) configured to be mechanically connected to the backwash pipe (1500) and configured to be disposed through a surface of the backwash pipe (1500) and configured to spray fluid, within the screen cage (80) interior, from the backwash pipe (1500), wherein the fluid is directed from the backwash pipe (1500) through the at least one inner nozzle (1700) toward the screen cage (80) interior to self-clean a pre-filter for a water circulation pump;
• and at least one outer nozzle (1705) configured to traverse and be mechanically connected in the screen cage (80) outer surface (1605) and configured to simultaneously spray, outside the screen cage (80), fluid from the backwash pipe (1500) directed in an axial stream substantially perpendicular to and away from the outer surface (1605) of the screen cage (80) by an axial jet outlet (2120) and a plurality of simultaneous radial streams (3305) configured to be directed substantially perpendicular to the axial stream by a respective plurality of radial jet outlets (2115) to clear debris from the outer surface (1605) and underside of the screen cage (80) for the water circulation pump.