A negative pressure wound therapy apparatus comprising: a negative pressure source configured to couple via a plurality of fluid flow paths to a plurality of wound dressings and provide negative pressure to the plurality of wound dressings, the plurality of fluid flow paths comprising: a first fluid flow path configured to fluidically connect a first wound dressing to a first inlet configured to be in fluid communication with the negative pressure source, the first fluid flow path including a first fluid leak configured to admit fluid into the first fluid flow path, a second fluid flow path configured to fluidically connect a second wound dressing to a second inlet configured to be in fluid communication with the negative pressure source, the second fluid flow path including a second fluid leak configured to admit fluid into the second fluid flow path, wherein a flow of fluid admitted into the second fluid flow path via the second fluid leak is different than a flow of fluid admitted into the first fluid flow path via the first fluid leak, wherein the first fluid leak modifies a first rate of flow in the fluid flow path such that an expected first rate of flow is different from an expected second rate of flow in the second fluid flow path by more than a threshold amount, and a controller configured to operate the negative pressure source, the controller further configured to: determine a total rate of flow in the plurality of fluid flow paths; detect presence of at least one operating condition based at least in part on the determined total rate of flow and at least one of a flow of fluid due to the first fluid leak or a flow of fluid due to the second fluid leak; and provide indication of the operating condition. a negative pressure source configured to couple via a plurality of fluid flow paths to a plurality of wound dressings and provide negative pressure to the plurality of wound dressings, the plurality of fluid flow paths comprising: a first fluid flow path configured to fluidically connect a first wound dressing to a first inlet configured to be in fluid communication with the negative pressure source, the first fluid flow path including a first fluid leak configured to admit fluid into the first fluid flow path, a second fluid flow path configured to fluidically connect a second wound dressing to a second inlet configured to be in fluid communication with the negative pressure source, the second fluid flow path including a second fluid leak configured to admit fluid into the second fluid flow path, wherein a flow of fluid admitted into the second fluid flow path via the second fluid leak is different than a flow of fluid admitted into the first fluid flow path via the first fluid leak, wherein the first fluid leak modifies a first rate of flow in the fluid flow path such that an expected first rate of flow is different from an expected second rate of flow in the second fluid flow path by more than a threshold amount, and a first fluid flow path configured to fluidically connect a first wound dressing to a first inlet configured to be in fluid communication with the negative pressure source, the first fluid flow path including a first fluid leak configured to admit fluid into the first fluid flow path, a second fluid flow path configured to fluidically connect a second wound dressing to a second inlet configured to be in fluid communication with the negative pressure source, the second fluid flow path including a second fluid leak configured to admit fluid into the second fluid flow path, wherein a flow of fluid admitted into the second fluid flow path via the second fluid leak is different than a flow of fluid admitted into the first fluid flow path via the first fluid leak, wherein the first fluid leak modifies a first rate of flow in the fluid flow path such that an expected first rate of flow is different from an expected second rate of flow in the second fluid flow path by more than a threshold amount, and a controller configured to operate the negative pressure source, the controller further configured to: determine a total rate of flow in the plurality of fluid flow paths; detect presence of at least one operating condition based at least in part on the determined total rate of flow and at least one of a flow of fluid due to the first fluid leak or a flow of fluid due to the second fluid leak; and provide indication of the operating condition. determine a total rate of flow in the plurality of fluid flow paths; detect presence of at least one operating condition based at least in part on the determined total rate of flow and at least one of a flow of fluid due to the first fluid leak or a flow of fluid due to the second fluid leak; and provide indication of the operating condition.