# Scheduled Meter Testing

**Citation:** 4 CCR 723-4 Rule 4304  
**Type / status:** regulation / current  
**Agency:** Colorado Public Utilities Commission  
**Effective:** Not stated  
**Published:** Not stated

(a) A utility shall test, or shall arrange for testing of, service meters in accordance with the schedule in this rule or in accordance with a sampling program approved by the Commission. (b) If it wishes to use a sampling program, a utility shall file an application to request approval of a samplin

## Document text

(a) A utility shall test, or shall arrange for testing of, service meters in accordance
with the schedule in this rule or in accordance with a sampling program approved
by the Commission.

(b) If it wishes to use a sampling program, a utility shall file an application to request
approval of a sampling program. The application shall include:
(I) the information required by paragraphs 4002(b) and 4002(c);
(II) a description of the sampling program which the utility wishes to use. This
description shall include, at a minimum the following:
(A) the type(s) of meters subject to the sampling plan;
(B) the frequency of testing;
(C) the procedures to be used for the sampling;
(D) the meter test method to be used;
(E) the accuracy of the testing and of the sampling plan;
(F) an explanation of the reason(s) for the requested sampling
program; and
(G) an analysis which demonstrates that, with respect to assuring the
accuracy of the service meters tested, the requested sampling
program is at least as effective as the schedule in this rule.
(c) Revisions to any portion of a sampling program approved pursuant to the
procedure in paragraph (b) of this rule shall be accomplished by the filing of, and
Commission approval of, a new application.
(d) Every service meter shall be tested and adjusted before installation to ensure
that it registers accurately and conforms with the requirements of rule 4302. In
addition, every service meter shall be tested on a periodic basis, as follows:
(I) diaphragm type gas service meter in sizes having rated capacity of 800
cubic feet or less per hour at one-half inch water column differential, every
six years;
(II) diaphragm type gas service meter in sizes having a rated capacity of more
than 800 cubic feet per hour at one-half inch water column differential,
every five years;
(III) rotary displacement type gas service meter in sizes having a rated
capacity of 5,000 cubic feet or less per hour at one-half inch water column
differential, every five years;
(IV) rotary displacement type gas service meters in sizes having a rated
capacity of more than 5,000 cubic feet per hour at a differential not to

exceed two inches water column, the frequency of testing stated in the
utility’s tariff;
(V) orifice meters, not less than once each year; and
(VI) meter types not listed, not less than once each year.
(e) In its tariff, a utility shall describe the utility’s practices concerning the following:
(I) testing and adjustment of service meters at installation; and
(II) periodic testing after installation.

## Provenance

- Official: Yes
- Source: <https://www.sos.state.co.us/CCR/DisplayRule.do?action=ruleinfo&ruleId=2260&deptID=18&agencyID=96&deptName=Department%20of%20Regulatory%20Agencies&agencyName=Public%20Utilities%20Commission&seriesNum=4%20CCR%20723-4>
- Source ID: `co-sos-ccr`
- SHA-256: `7fbe9b7bcad0d0fd9c48a0919c81c4344603966568693c79ba61ca81a5813c03`
- Retrieved: 2026-08-12T04:36:48.096Z
- Exported: 2026-08-26T11:53:44.325Z
- Document slug: `co-ccr-4-723-4-4304`

### Source metadata

```json
{
  "jurisdiction": "US-CO",
  "code": "4 CCR 723-4",
  "ruleKey": "4304",
  "pipelineScope": "colorado-jurisdictional-gas-utilities",
  "legalScope": "Current 4 CCR 723-4 rules regulating Colorado jurisdictional gas utilities and gas master-meter operators, including construction, operation, system safety, gas infrastructure planning, metering, service, and enforcement provisions. This is an adjacent gas-utility corpus, not a replacement for the repealed dedicated 4900-series pipeline-safety rules.",
  "applicabilityCaveat": "Part 4 applies according to Colorado Public Utilities Commission jurisdiction and each rule's scope. The former dedicated pipeline-safety rules 4900 through 4975 are reserved after repeal; this connector does not represent them as current. Part 4 does not replace federal pipeline-safety requirements, determine whether a facility is interstate or intrastate, or resolve operator-specific orders, waivers, tariffs, or later rulemaking.",
  "references": [],
  "ruleInfoUrl": "https://www.sos.state.co.us/CCR/DisplayRule.do?action=ruleinfo&ruleId=2260&deptID=18&agencyID=96&deptName=Department%20of%20Regulatory%20Agencies&agencyName=Public%20Utilities%20Commission&seriesNum=4%20CCR%20723-4",
  "pucRulesUrl": "https://puc.colorado.gov/gasrulesandregulations",
  "ruleVersionId": "12549",
  "editionEffectiveOn": "2026-06-14",
  "publicationStatus": "The Colorado Secretary of State identifies the source as the official publication of state administrative rules. The edition date applies to the compiled rule version and is not represented as the effective date of every provision.",
  "rights": "Official state rule text is preserved with attribution and source links. Public accessibility does not imply rights in agency marks, third-party material, or incorporated standards; commercial redistribution requires review.",
  "region": "CO"
}
```