Aquarium Air Line Open Loop PVC Pipe Check Valve Pipe Valve Aquarium Escape Valve

Back pressure is the build-up of pressure on the diaphragm due to resistance to air flow caused by restriction of air. This occurs when excess air is produced by the pump, or when the air channels are inadvertently blocked.

Back pressure over time resulting from clogged air stones or other air system blockages and restrictions will cause the diaphragm to expand or rupture. An expanded diaphragm leads to a loss of air volume while a rupture results in total loss of air.

The inclusion of an escape valve into the system (See G placement above), which is left open to allow all excess air to atmosphere, will greatly reduce the risk of ruptured diaphragms.