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1. Why do I suddenly need a backflow preventer after years of not having one?

CCWD does its best to identify secondary sources of water, since most wells are not identifiable from the street; it is difficult for Inspectors to know who has a well. District regulations require backflow regardless of when the well was installed.

2. I just leased this building, I am now required to install backflow prevention, why wasn't this required by the previous tenant and who should pay for this?

When a commercial account is started, the District reviews the use of the new tenant. If current backflow is not up to District code, the correction must be made before water service is permitted. Cost for the device is covered by either the tenant or the property owner.

3. Will the installation of the backflow preventer affect the pressure and or flow of my water service?

Yes, the installation of the double check valve will reduce your pressure by approximately 6-9 pounds per square inch and the reduced pressure device will reduce your pressure by 9-14 pounds per square inch. Either device will also reduce your water flow due to the reduced pressure.

4. Why is one backflow preventer above grade, and the other is below grade in a box?

The reduced pressure backflow preventer discharges water when it fails. Plumbing code requires that the discharge point is a minimum of 12 inches above the ground. The double check valve does not discharge, and is therefore permitted to be installed below grade in a box.