Systems and methods for draining bodily fluids

A fluid drainage system, comprising:

• a pumping mechanism which is fluidly connectable at a first end to a portion of a drainage line;
• a venting mechanism having a one-way valve and which is connectable at a first end into fluid communication with a drainage catheter and the drainage line;
• and
• a bypass lumen fluidly connected along the drainage line at a first bypass end located distal to the pumping mechanism and at a second bypass end located proximal to the pumping mechanism, the bypass lumen having a one-way bypass valve positioned along the bypass lumen such that fluid passes from the first bypass end to the second bypass end and circumvents the pumping mechanism and flows further downstream beyond the pumping mechanism, such that fluid is inhibited from flowing upward within the bypass lumen,
• wherein the pumping mechanism is configured to create a negative pressure within the drainage line when the pumping mechanism is in communication with the drainage line, and wherein the one-way valve is configured to open to an environment when the venting mechanism is connected at the first end and when the drainage line is at a pressure less than an environmental pressure such that air from the environment is introduced through the one-way valve and into the drainage line so that an airlock is prevented from forming within the drainage line.