Eliminates condensation, prevents dripping of toilet tanks, ends moisture on floors. Built-in check valves prevent hot and cold water cross-connection. Water temperature is adjustable, hot water inlet can be shut-off during off-season. Superior to tank liners, provides a permanent solution. All connections are 5/8″ O.D. compression. Import. No. 109-503: Type: Built-In Check Valves, Size: 5/8” OD Compression
