Does the BOLLFILTER differential pressure indicator need to be maintained?

The BOLLFILTER Differential Pressure Indicator is used on most of the filters we produce and is an important part of the system.

To ensure that it is functioning correctly it is advisable to inspect the internals periodically. To assist in this we have produced a simple short video showing the steps to take and what to check.

The rubber diaphragm is the only “consumable item" that will need to be replaced. The remaining internal parts should not need replacement.