2. The hydrant drips after shutoff

Since a Freezeless Hydrant actually shuts off inside the heated portion of the structure, the water inside the hydrant will drain out after shutoff.   The shutoff point could be any distance from 4" to 24" or more inside the structure.  This installation should also be pitched to allow the water to easily drain out of the hydrant.  The hydrant may drip for up to 60 seconds after shutoff.   If the water continues to drip after that time, you most likely need to replace the bibb washer.

For the C-144, Prier uses a OO Beveled Bibb Washer for this style of Freezeless Hydrant.   That Part Number is C-134KT-802.