The Walmart in Belleville was evacuated Friday morning, after a leak in the sprinklers.
Sometime after 8:30 a.m., low pressure was noticeable coming from the overhead sprinklers.
Staff took action, asking shoppers to head outside.
Belleville Fire officials were called to the scene.
No damage estimate is known, however there was no fire and it is believed the water did not cause significant damage to product.