Abstract: A manifold for use in a datacenter. The manifold comprising a housing and a plunger positioned within the housing. The housing comprising an inlet for receiving a cooling fluid; an outlet for enabling an outflow of the cooling fluid; and a fluid flow passage for enabling the flow of the cooling fluid from the inlet to the outlet. The plunger including a fluid flow channel and a biasing member. The plunger moveable between first and second positions. In the first position, the fluid flow channel is misaligned with the fluid flow passage to prevent the cooling fluid from flowing from the inlet to the outlet. In the second position, the fluid flow channel is aligned with the fluid flow passage to permit the cooling fluid to flow from the inlet to the outlet. The biasing member automatically moves the plunger to the first position upon a loss of power.