The access panel on this concealed cistern revealed an older side-inlet filling valve that had begun weeping at the brass connection. Mineral buildup around the seat confirmed the leak had persisted for some time. Our technician isolated supply, removed the corroded valve, and fitted an adjustable replacement suited to the cistern dimensions. The outlet rubber showed cracking and was replaced at the same time. Worth noting that these concealed units use parts no longer manufactured, and future repairs may require creative solutions. Sunshine Coast Plumbing and Hot Water completed testing with no drips detected. If your in-wall cistern is running or leaking, booking plumbing services sooner rather than later avoids moisture damage behind the tiles.
