Air Gap – Trap Primer Condensate to Sewer

Ok I have the HVAC line going into the Sanitary Drainge or Sewer. If it were a high effency furnace it wouldn’t need a trap primer. Now the trap primer shown below has holes in the side. The builder was trying to tell me that the trap primer has b built-in air gap and thats what the holes were for.

Trap Primer Without Air Gap

Now I went to the manufacturers site and found this information