Hayward Pressure Gauge Styrofoam As a shock treatment for

As a shock treatment for low chlorine or combined chlorine if selected as the troubleshooting oxidizer

For full pool coverage including walls and waterline

as well as protection on gusty days

Approx 5-5/8" diameter outside edge to outside edge

Hayward Pressure Gauge Styrofoam As a shock treatment forGenuine Hayward pool filter pressure gauge. The ECX270861 has the threads on the bottom for top mount filters and displays up to 60 PSI for select Hayward pool filters. Details: Hayward P N: ECX270861 1 4" threads on bottom 0 psi to 60 PSI Fits the following filter models: Hayward SwimPro all models, 2003 to current Hayward ProSeries, S164T and (W3)S166T Hayward ProSeries, S180T, S210T, S220T, S220T2, S230T, S244T, S244T2, S270T, S210S, S244S, S310S