A system comprising ▪ an integrated water purifying apparatus comprising: • a pre-filter circuit connected to a water inlet for receiving water from a water source, a particle filter and an activated carbon filter arranged to filter water received via the water inlet to produce pre-treated water; • a fluid circuit arranged to receive pre-treated water from the pre-filter circuit, the fluid circuit includes ∘ an RO-pump; and a ∘ a Reverse Osmosis, RO, device, the water purifying apparatus is further arranged to pump pre-treated water through the RO device using the RO-pump, to produce purified water, and output the purified water through a purified water outlet connector; the fluid circuit further includes ∘ a heating device arranged to a permeate fluid path to heat purified water from the RO device to a temperature above 65 °C; the water purifying apparatus is further arranged to heat disinfect the fluid circuit using the heated purified water; the system further comprises: ▪ a line set connected to the purified water outlet connector at a water line connector of the line set, wherein the line set includes at least one sterile sterilizing grade filter (70a, 70b) arranged to filter the purified water into sterile purified water. ▪ an integrated water purifying apparatus comprising: • a pre-filter circuit connected to a water inlet for receiving water from a water source, a particle filter and an activated carbon filter arranged to filter water received via the water inlet to produce pre-treated water; • a fluid circuit arranged to receive pre-treated water from the pre-filter circuit, the fluid circuit includes ∘ an RO-pump; and a ∘ a Reverse Osmosis, RO, device, the water purifying apparatus is further arranged to pump pre-treated water through the RO device using the RO-pump, to produce purified water, and output the purified water through a purified water outlet connector; the fluid circuit further includes ∘ a heating device arranged to a permeate fluid path to heat purified water from the RO device to a temperature above 65 °C; the water purifying apparatus is further arranged to heat disinfect the fluid circuit using the heated purified water; the system further comprises: • a pre-filter circuit connected to a water inlet for receiving water from a water source, a particle filter and an activated carbon filter arranged to filter water received via the water inlet to produce pre-treated water; • a fluid circuit arranged to receive pre-treated water from the pre-filter circuit, the fluid circuit includes ∘ an RO-pump; and a ∘ a Reverse Osmosis, RO, device, the water purifying apparatus is further arranged to pump pre-treated water through the RO device using the RO-pump, to produce purified water, and output the purified water through a purified water outlet connector; the fluid circuit further includes ∘ a heating device arranged to a permeate fluid path to heat purified water from the RO device to a temperature above 65 °C; the water purifying apparatus is further arranged to heat disinfect the fluid circuit using the heated purified water; the system further comprises: ∘ an RO-pump; and a ∘ a Reverse Osmosis, RO, device, the water purifying apparatus is further arranged to pump pre-treated water through the RO device using the RO-pump, to produce purified water, and output the purified water through a purified water outlet connector; the fluid circuit further includes ∘ a heating device arranged to a permeate fluid path to heat purified water from the RO device to a temperature above 65 °C; ∘ a heating device arranged to a permeate fluid path to heat purified water from the RO device to a temperature above 65 °C; the water purifying apparatus is further arranged to heat disinfect the fluid circuit using the heated purified water; the system further comprises: ▪ a line set connected to the purified water outlet connector at a water line connector of the line set, wherein the line set includes at least one sterile sterilizing grade filter (70a, 70b) arranged to filter the purified water into sterile purified water.