AirPrime™ Information

World Class

Fire Industry


Internal Inlet Filter

The compressed air inlet port for the Manual AirPrime primer is protected by a stainless steel mesh filter that is recessed within the threaded port located at the top of the primer body. The purpose of the filter is to trap debris that accumulates in the air brake system over time or due to excess pipe sealant or Teflon tape used during assembly of the truck. If the efficiency of the primer degrades, this is a common cause and should be investigated.

Checking a Manual Primer

  1. Locate the primer within the fire pump enclosure.
  2. Unscrew the air supply fitting located at the top of the primer body.
  3. With an angled dental pick, pull out the filter.
  4. Visually inspect the filter for blockage.
  5. If debris is present on the domed portion of the filter, try to remove it with the dental pick. Alternatively, hold the filter and blow compressed air through the bottom (flat portion) of the filter. Do not direct the airflow towards anyone.
  6. If the filter remains clogged and you are unable to clean it, order a replacement from Trident, Part #21.002.0
  7. Replace the cleaned (or new) filter into the primer using a small diameter object to press the filter flat into the bottom of the bore.
  8. Reconnect the airline and check the primer for proper function.

Air Inlet Fitting

User Supplied

  1. Supply Air
  2. Brass Fitting
  3. Filter

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Phone: 215-293-0700