Lowest Priced Pressure Vacuum Breaker Assemblies:
These Are Current, Most Affordable, Models of PVB Assemblies Available:
Wilkins:   1/2" 720A PVB Pressure Vacuum Breaker Sku# 12-720A
$70.21
Wilkins:  3/4" 720A PVB Pressure Vacuum Breaker
$70.36
Wilkins:  1" 720A PVBPressure Vacuum Breaker
$78.79
Apollo-Conbraco: 1 1/4" 4A-500 PVB #4A-506-A2
$191.00
Apollo-Conbraco: 1 1/2" 4A-500 PVB  #4A-507-A2
$221.00
Apollo-Conbraco: 2" - 4A-500 PVB #4A-508-A2
$314.00