Pentair has made the following adjustments to the 5800 valve piston rod and retainer:
1. In January 2018, we introduced a more robust snap feature on the piston rod, as well as a red retainer. Note: This will also affect all 5000 replacement piston assemblies.
2. As of October 2017, the piston rods have been marked with a white or blue dot, indicating its type. This change also applies to the 5810 and 5812 valves.

a. A white dot indicates a downflow piston.

b. A blue dot indicates an upflow piston.
Please note that neither of these changes will affect the fit or function of the valve. The new retainer color can provide an easy visual signifier of the change. Please reference the diagram below.

All future orders will now include the new piston rod and retainer as shown above. If you have any questions, please contact your Pentair representative.

As always, thank you for choosing Pentair products.