Stockton project owners allege Cal Water improperly withheld meters over backflow device demand

A Stockton homeowner, Kimberly Graves, told the State Water Resources Control Board at public forum April 15 that California Water Service Company (Cal Water) is refusing to release water meters for her new construction project unless she installs a reduced pressure zone (RPZ) backflow device that she says is unnecessary under the cited regulations.

Graves read portions of cross‑connection guidance and Cal Water Rule 16 and said her property lacks the nonpotable sources that define a loop‑through hazard. She said her fire sprinkler system uses potable piping and the project was designed to meet the California Plumbing Code. Graves said the utility first told her she had a 3/4‑inch service and later claimed she had a 1‑inch meter; she said records and written notes contradict Cal Water’s actions and she is at risk of losing financing and defaulting on a loan if meters are not released.

Why it matters: The dispute raises questions about application of cross‑connection rules, meter installation practices and the process for resolving customer complaints with water utilities. Graves asked the board to have the Division of Drinking Water follow up and act as an intermediary with Cal Water; board staff said they would connect Graves with the division for further assistance.

Graves said she had consulted backflow experts and believes the device is not required under Cal Water’s Rule 16 and the California Plumbing Code; she also said one expert declined further work after Cal Water allegedly contacted him. Graves requested review of Cal Water’s enforcement and asserted discriminatory treatment.

Board staff responded in public forum that the Division of Drinking Water would follow up directly with Graves and Cal Water to try to resolve the customer complaint. No formal enforcement action was announced at the meeting.