An adjustable jacket for an insulated conduit is provided, the adjustable includes inner and outer surface, first and second axial ends, and first and second longitudinal ends that each extends between the first and second axial ends. The peritoneal dialysis machine automatically generates a predetermined volume of distilled water each day. After determining the allocated frequency bands, the method determines frequency band availability by detecting the in band energy using a bi-threshold energy detector, where the energy detector makes hard decisions and soft decisions.