# 255.381 Service lines: excess flow valve performance standards. **Citation:** 16 NYCRR 255.381 **Type / status:** regulation / current **Agency:** New York State Public Service Commission **Effective:** Not stated **Published:** Not stated Transmission and Distribution of Gas. (a) Excess flow valves (EFVs) to be used on service lines that operate continuously throughout the year at a pressure not less than 10 psig (69 kPa) must be manufactured and tested by the manufacturer according to an industry specification, or the manufacturer's written specification, to ensure that each valve will: (1) function properly up to the maximum o ## Document text (a) Excess flow valves (EFVs) to be used on service lines that operate continuously throughout the year at a pressure not less than 10 psig (69 kPa) must be manufactured and tested by the manufacturer according to an industry specification, or the manufacturer's written specification, to ensure that each valve will: (1) function properly up to the maximum operating pressure at which the valve is rated; (2) function properly at all temperatures reasonably expected in the operating environmental of the service line; (3) at 10 psig (69 kPa) close at, or not more than 50 percent above, the rated closure flow rate specified by the manufacturer and upon closure, reduce the gas flow to the level indicated: (i) for an excess flow valve designed to allow pressure to equalize across the valve, no more than five percent of the manufacturer's specified closure flow rate, up to a maximum of 20 cubic feet (0.566 cubic meter) per hour; or (ii) for an excess flow valve designed to prevent equalization of pressure across the valve, no more than 0.4 cubic foot (0.011 cubic meter) per hour; and (4) not close when the pressure is less than the manufacturer's minimum specified operating pressure and the flow rate is below the manufacturer's minimum specified closure flow rate. (b) An excess flow valve must meet the applicable requirements of this Part regarding materials and design of pipeline components. (c) An operator must mark or otherwise identify the presence of an excess flow valve in the service line. (d) An operator shall locate an excess flow valve as near as practical to the fitting connecting the service line to its source of gas supply. (e) An operator should not install an excess flow valve on a service line where the operator has prior experience with contaminants in the gas stream, where these contaminants could be expected to cause the excess flow valve to malfunction or where the excess flow valve would interfere with necessary operation and maintenance activities on the service, such as blowing liquids from the line. ## Provenance - Official: Yes - Source: - Source ID: `ny-dps-nycrr` - SHA-256: `d34712c2146ba0fb7cb12325a35529865a0ab388af2c2b804b8ddfddf69c41cb` - Retrieved: 2026-08-12T06:20:40.894Z - Exported: 2026-08-24T13:50:04.673Z - Document slug: `ny-nycrr-255-381` ### Source metadata ```json { "jurisdiction": "US-NY", "title": 16, "part": "255", "partTitle": "Transmission and Distribution of Gas", "scopeKind": "gas-pipeline-safety", "tocPath": [ "Part 255 Transmission and Distribution of Gas", "Customer Meters, Service Regulators, and Service Lines" ], "legalScope": "Complete current terminal legal unit exposed by the DPS-designated Title 16 NYCRR pipeline-safety part inventory.", "applicabilityCaveat": "Applicability depends on the part and section, Commission jurisdiction, commodity and facility type, intrastate or interstate status, operator and activity, exemptions, waivers, federal preemption, Commission orders, and incorporated law. DPS inspects portions of interstate systems for PHMSA, but PHMSA retains federal enforcement authority. DPS states that all jurisdictional Part 256 gas-holder and Part 257 LPG-plant facilities have been decommissioned even though those regulations remain unrepealed.", "incorporationCaveat": "These parts incorporate or rely on federal pipeline regulations, federal and New York statutes, Commission rules and orders, and privately authored technical standards. Part 10 supplies incorporation details. References metadata preserves explicit citations but does not reproduce external material, determine licensing rights, or decide whether a particular incorporation is static or dynamic.", "publicationCaveat": "The New York Department of Public Service identifies these eleven Title 16 NYCRR parts as its state pipeline-safety regulations and links to the public DOS/Westlaw NYCRR reading copy. That site labels the online text unofficial and directs users needing evidentiary accuracy to the Official NYCRR maintained by the Department of State Division of Administrative Rules. Each section's 'Current through' date is the most recent official NYCRR supplement covering that section, not a uniform corpus-wide amendment date.", "rights": "New York government-edict text is preserved with DPS, Department of State, and publisher attribution. The public reading site's presentation and enhancements, agency marks, forms, annotations, and incorporated federal or privately authored standards require separate rights review; this connector does not claim rights in those materials.", "rightsReviewRequired": true, "currentThrough": "2024-05-31", "historyEvents": "No event is emitted because the section reading copy does not supply an explicit adoption, filing, or effective-date history.", "publisherCitation": "16 CRR-NY 255.381", "identityAnomaly": null, "references": [], "region": "NY" } ```