Quick Disconnect Compression Valve
Picture from December 2000

This is a Quick Disconnect Compression Valve. This valve is used between the Calcium Reactor and 2nd Stage Reactor. As the name implies, it allows the units to be quickly disconnected for cleaning. Since it is a disconnect valve, when separated, the water in the calcium reactor will not drain.

Although the compression fittings are metal (stainless steel), no metal actually touches the path the water takes.

The compression fittings are ¼ inch and pressure rated. I purchased this quick disconnect valve from McMaster-Carr. Oddly, these are considered two separate parts and not kit. You have to order the left and right halves. The left half with the valve is part # 5012K41 and the right half is part # 5012K36.