A method of filtering pressurized air used to control a compressor bleed valve (22; 122) of a gas turbine engine, the method comprising: receiving the pressurized air in a conduit (25; 125) via an inlet (26; 126) of the conduit (25; 125); releasing a first portion of the pressurized air out of the conduit (25; 125) via an outlet (28; 128; 228) of the conduit (25; 125); releasing a second portion of the pressurized air from the conduit (25; 125) via a port (30; 130) disposed between the inlet (26; 126) and the outlet (28; 128) of the conduit (25; 125); directing the second portion of the pressurized air from the port (30; 130) to a filter (34; 134); filtering the second portion of the pressurized air using the filter (34; 134); and directing the second portion of the pressurized air from the filter (34; 134) toward the compressor bleed valve (22; 122), wherein: the filter (34; 134) has a cylindrical configuration; filtering the second portion of the pressurized air using the filter (34; 134) includes collecting debris inside the filter (34; 134); and the method includes: ceasing to receive the pressurized air in the conduit (25; 125) via the inlet (26; 126); and receiving the debris collected inside the filter (34; 134) into the conduit (25; 125) via an upward flow path (36; 136) and the port (30; 130), wherein the conduit is substantially linear and has a longitudinal axis, characterised in that the filter has an axis of revolution oriented obliquely to the longitudinal axis of the conduit; and the directing the second portion of the pressurized air from the port (30; 130) to the filter (34; 134) is along the upward flow path (36; 136). receiving the pressurized air in a conduit (25; 125) via an inlet (26; 126) of the conduit (25; 125); releasing a first portion of the pressurized air out of the conduit (25; 125) via an outlet (28; 128; 228) of the conduit (25; 125); releasing a second portion of the pressurized air from the conduit (25; 125) via a port (30; 130) disposed between the inlet (26; 126) and the outlet (28; 128) of the conduit (25; 125); directing the second portion of the pressurized air from the port (30; 130) to a filter (34; 134); filtering the second portion of the pressurized air using the filter (34; 134); and directing the second portion of the pressurized air from the filter (34; 134) toward the compressor bleed valve (22; 122), wherein: the filter (34; 134) has a cylindrical configuration; filtering the second portion of the pressurized air using the filter (34; 134) includes collecting debris inside the filter (34; 134); and the method includes: ceasing to receive the pressurized air in the conduit (25; 125) via the inlet (26; 126); and receiving the debris collected inside the filter (34; 134) into the conduit (25; 125) via an upward flow path (36; 136) and the port (30; 130), wherein the conduit is substantially linear and has a longitudinal axis, characterised in that the filter has an axis of revolution oriented obliquely to the longitudinal axis of the conduit; and the directing the second portion of the pressurized air from the port (30; 130) to the filter (34; 134) is along the upward flow path (36; 136). the filter (34; 134) has a cylindrical configuration; filtering the second portion of the pressurized air using the filter (34; 134) includes collecting debris inside the filter (34; 134); and the method includes: ceasing to receive the pressurized air in the conduit (25; 125) via the inlet (26; 126); and receiving the debris collected inside the filter (34; 134) into the conduit (25; 125) via an upward flow path (36; 136) and the port (30; 130), wherein the conduit is substantially linear and has a longitudinal axis, characterised in that ceasing to receive the pressurized air in the conduit (25; 125) via the inlet (26; 126); and receiving the debris collected inside the filter (34; 134) into the conduit (25; 125) via an upward flow path (36; 136) and the port (30; 130), wherein the conduit is substantially linear and has a longitudinal axis, characterised in that the filter has an axis of revolution oriented obliquely to the longitudinal axis of the conduit; and the directing the second portion of the pressurized air from the port (30; 130) to the filter (34; 134) is along the upward flow path (36; 136).