Uponor Wirsbo has released the AQUASAFE(TM) patented combination plumbing/fire sprinkler system that uses an interconnected grid of tubing to feed both the sprinklers and the plumbing fixtures. A sprinkler head is attached to the stainless steel four-port fitting. A cold water manifold feeds Wirsbo AQUAPEX(R) tubing directly to the fittings. The AQUASAFE sprinkler fittings and supply lines are part of the home's plumbing system. Each time a plumbing fixture draws water, fresh water is drawn to the sprinkler head, eliminating stagnant water from the system. In case of a fire, the sprinkler head is heat activated. Uponor Wirsbo.