Thanks to Kansas City Deaerator for providing some of this information

Many deaerators in the past have been built with vent piping that protrudes through the water box to the external portion of the heater allowing the oxygen to be eliminated from the deaerator. Many manufacturers provided a dog leg type vent with a miter joint which typically fails due to inadequate welding where the vent pipe supports the valve plate. This can cause significant loss or performance and effect your energy savings long term. Annual inspections of the welds are recommended to detect such failures or you may be better off just replacing the piping with a sound solution for your physical conditions. Its easy to overlook or push back these inspections but doing so can lead to more problems than it’s worth.

If your facility is operating an ageing deaerator we’d be happy to discuss modern energy efficient solutions with you specific to your application. We have a great deal of experience that may help you reducce costs through smart energy efficiency.