HomeMy WebLinkAboutBackflow Prevention-Reduced PressureIn accordance with Title 17 of the California Administrative Code, all piers and docks must have
an approved backflow prevention device installed on the water supply line serving that pier or
dock. The purpose of the device is to protect the domestic water system from being
contaminated by seawater or by “used” water from boat holding tanks. It is also required that
this device be tested annually.
You are therefore, required to install an approved Reduced Pressure Principle Backflow Device
downstream of the water meter, landward of the bulkhead or hide tide line. The size of the
device should match the size of the supply line, typically ¾” or 1” but sometimes larger.
As soon as the installation has been completed, please contact the Harbor Resources Division at
949-644-3044 for reinspection.
Typical Installation
This device must
be installed
above ground Protective Enclosure (If Needed)
Drain Required
For devices 2” &
Below.
Min. Clearance 12”
R.P.P.
Dock
Flow
* THE REDUCED PRESSURE PRINCIPLE DEVICE NEEDS TO BE ON THE “APPROVED”
USC BACKFLOW LIST*
Partial list of approved models:
Company Model/Size
Febco 825Y, 825YA, 860
Watts 909, 009
Wilkins 975, 375
BACKFLOW PREVENTION DEVICE
(REDUCED PRESSURE PRINCIPLE ASSEMBLIES)