Astral Pool Sight Glass Kit (4404120706) potterbrumfield and this Intermatic version is

and this Intermatic version is an SPST 115 volt model with override capability using the PB913N66 reference

The 2 inch diameter gives this product practical value because larger plumbing systems often require both strong flow capacity and routing flexibility

Because heater parts can look similar across different brands and model years

This 110V replacement is especially useful when the original blower is noisy

1-1/2 inch slip x 1 inch slip x 1 inch slip connection

Astral Pool Sight Glass Kit (4404120706) potterbrumfield and this Intermatic version isThe Astral Pool sight glass kit is designed for compatible valve applications where visual monitoring of water condition or flow during maintenance is needed. A sight glass is useful because it gives the user a direct view into the line, helping make service tasks like backwashing more informed and more efficient. This replacement kit is especially useful when the original sight glass is cloudy, cracked, leaking, or no longer dependable. Replacing it