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5. Tap the knuckle valve linkages until the valve comes off and falls into the knuckle valve
housing.
6. Grip the knuckle valve by the rubber disk and remove it from the housing.
Figure 43 – Removing the Knuckle Valve
7. Lightly clean the valve seat inside the knuckle valve housing using wet and dry sandpaper.
Figure 44 – Cleaning the Knuckle Valve Housing
Clean cautiously. Do not remove paint or cause damage to the meter body.
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HP PROTECTUS
®
III Installation and Maintenance Guide
Chapter 4: Maintenance and Troubleshooting
Summary of Contents for HP PROTECTUS III
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