OAR 333-061-0071
Backflow Prevention Assembly Installation and Operation Standards

(1)

Any approved backflow prevention assembly required by OAR 333-061-0070 (Cross Connection Control Requirements) shall be installed in a manner that:

(a)

Facilitates its proper operation, maintenance, inspection, and in-line testing using standard installation procedures approved by the Authority, such as, but not limited to, University of Southern California, Manual of Cross-Connection Control, 10th Edition, the Pacific Northwest Section American Water Works Association, Cross Connection Control Manual, 7th Edition, or the local administrative authority having jurisdiction;

(b)

Precludes the possibility of continuous submersion of an approved backflow prevention assembly, and precludes the possibility of any submersion of the relief valve on a RP; and

(c)

Maintains compliance with all applicable safety regulations and the Oregon Plumbing Specialty Code.

(2)

For premises isolation installation:

(a)

The approved backflow prevention assembly shall be installed at a location adjacent to the service connection or POD; or

(b)

Any alternate location must be with the advance approval of the water supplier and must meet the water supplier’s cross connection control requirements; and

(c)

The premises owner shall ensure no cross connections exist between the POD from the public water system and the approved backflow prevention assembly.

(3)

Bypass piping installed around any approved backflow prevention assembly must be equipped with an approved backflow prevention assembly to:

(a)

Afford at least the same level of protection as the approved backflow prevention assembly being bypassed; and

(b)

Comply with all requirements of these rules.

(4)

All Oregon Plumbing Specialty Code approved residential multi-purpose fire suppression systems constructed of potable water piping and materials do not require a backflow prevention assembly.

(5)

Stand-alone fire suppression systems, being a piping system within a premises intended to only serve as a fire protection system separated from the potable water system, shall be protected commensurate with the degree of hazard, as defined in Table 43 (Backflow Prevention Methods).

(6)

Stand-alone irrigation systems shall be protected commensurate with the degree of hazard, as defined in Table 43 (Backflow Prevention Methods).

(7)

A RP or RPDA: (Figure 1, see attached)

(a)

Shall conform to bottom and side clearances when the assembly is installed inside a building. Access doors may be provided on the top or sides of an above-ground vault;

(b)

Shall always be installed horizontally, never vertically, unless they are specifically approved for vertical installation;

(c)

Shall always be installed above the 100 year (1 percent) flood level unless approved by the appropriate local administrative authority having jurisdiction;

(d)

Shall never have extended or plugged relief valves;

(e)

Shall be protected from freezing when necessary;

(f)

Shall be provided with an approved air gap drain;

(g)

Shall not be installed in an enclosed vault or box unless a bore-sighted drain to daylight is provided where there is an unrestricted straight-line opening in the enclosure that vents to grade, and is sized and constructed to adequately drain the full flow discharge from the reduced pressure principle backflow prevention assembly thus preventing any potential for submersion of the assembly;

(h)

May be installed with reduced clearances if the pipes are two inches in diameter or smaller, are accessible for testing and repairing, and approved by the appropriate local administrative authority having jurisdiction;

(i)

Shall not be installed at a height greater than five feet unless there is a permanently installed platform meeting Oregon Occupational Safety and Health Administration (OR-OSHA) standards to facilitate servicing the assembly; and

(j)

Be used to protect against a non-health hazard or health hazard for backsiphonage or backpressure conditions.

(8)

A DC or DCDA: (Figure 2, see attached)

(a)

Shall conform to bottom and side clearances when the assembly is installed inside a building;

(b)

May be installed vertically as well as horizontally provided the assembly is specifically listed for that orientation in the Authority’s Approved Backflow Prevention Assembly List.

(c)

May be installed below grade in a vault, provided that water-tight fitted plugs or caps are installed in the test cocks, and the assembly shall not be subject to continuous immersion;

(d)

Shall not be installed at a height greater than five feet unless there is a permanently installed platform meeting Oregon Occupational Safety and Health Administration (OR-OSHA) standards to facilitate servicing the assembly;

(e)

May be installed with reduced clearances if the pipes are two inches in diameter or smaller, provided that they are accessible for testing and repairing, and approved by the appropriate local administrative authority having jurisdiction;

(f)

Shall have adequate drainage provided except that the drain shall not be directly connected to a sanitary or storm water drain. Installers shall check with the water supplier and appropriate local administrative authority having jurisdiction for additional requirements;

(g)

Shall be protected from freezing when necessary; and

(h)

Be used to protect against non-health hazards under backsiphonage and backpressure conditions.

(9)

A PVB or SVB shall: (Figure 3, see attached)

(a)

Be installed where occasional water discharge from the assembly caused by pressure fluctuations will not be objectionable;

(b)

Have adequate spacing available for maintenance and testing;

(c)

Not be subject to flooding;

(d)

Be installed a minimum of 12 inches above the highest downstream piping and outlets;

(e)

Have absolutely no means of imposing backpressure by a pump or other means. The downstream side of the PVB or SVB may be maintained under pressure by a valve; and

(f)

Be used to protect against backsiphonage only, not backpressure.

(10)

An Atmospheric Vacuum Breaker (AVB) shall: (Figure 4, see attached)

(a)

Have absolutely no means of shut-off on the downstream or discharge side of the AVB;

(b)

Not be installed in dusty or corrosive atmospheres;

(c)

Not be installed where subject to flooding;

(d)

Be installed a minimum of six inches above the highest downstream piping and outlets;

(e)

Be used intermittently;

(f)

Have product and material approval under the Oregon Plumbing Specialty Code for non-testable devices.

(g)

Not be pressurized for more than 12 hours in any 24-hour period; and

(h)

Be used to protect against backsiphonage only, not backpressure.
[ED. NOTE: To view attachments referenced in rule text, click here to view rule.]

Source: Rule 333-061-0071 — Backflow Prevention Assembly Installation and Operation Standards, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=333-061-0071.

333‑061‑0005
Purpose 333‑061‑0010
Scope 333‑061‑0015
Adoption by Reference 333‑061‑0020
Definitions 333‑061‑0025
Responsibilities of Water Suppliers 333‑061‑0030
Maximum Contaminant Levels and Action Levels 333‑061‑0031
Maximum Residual Disinfectant Levels 333‑061‑0032
Treatment Requirements and Performance Standards for Surface Water, Groundwater Under Direct Influence of Surface Water, and Groundwater 333‑061‑0034
Treatment Requirements and Performance Standards for Corrosion Control 333‑061‑0036
Sampling and Analytical Requirements 333‑061‑0040
Reporting and Record Keeping 333‑061‑0042
Public Notice 333‑061‑0043
Consumer Confidence Reports 333‑061‑0045
Variances 333‑061‑0046
Permits 333‑061‑0050
Construction Standards 333‑061‑0055
Waivers from Construction Standards 333‑061‑0057
Voluntary Drinking Water Protection Program 333‑061‑0060
Plan Submission and Review Requirements 333‑061‑0061
Capacity Requirements for Public Water Systems 333‑061‑0062
Land Use Coordination 333‑061‑0063
Environmental Review Process for The Safe Drinking Water Revolving Loan Fund Program 333‑061‑0064
Emergency Response Plan Requirements 333‑061‑0065
Operation and Maintenance 333‑061‑0070
Cross Connection Control Requirements 333‑061‑0071
Backflow Prevention Assembly Installation and Operation Standards 333‑061‑0072
Backflow Assembly Tester Certification 333‑061‑0073
Cross Connection Specialist Certification 333‑061‑0074
Cross Connection Training Programs, Course, and Instructor Requirements 333‑061‑0075
Sanitary Surveys of Watersheds 333‑061‑0076
Sanitary Surveys 333‑061‑0077
Composite Correction Program & Comprehensive Performance Evaluations 333‑061‑0078
Coliform Investigations 333‑061‑0080
Role of Counties 333‑061‑0085
Supplemental Fluoridation 333‑061‑0087
Product Acceptability Criteria 333‑061‑0089
Annual Water System Fee 333‑061‑0090
Penalties 333‑061‑0095
Severability 333‑061‑0097
Adverse Health Effects Language 333‑061‑0098
References 333‑061‑0210
Operator Certification: Scope 333‑061‑0220
Classification of Water Treatment Plants and Water Distribution Systems 333‑061‑0225
General Requirements Applying to Water Suppliers and Water Systems 333‑061‑0228
Certification Requirements for Small Water System Operators 333‑061‑0230
Contracting For Services 333‑061‑0232
General Requirements Applying to Water System Operators 333‑061‑0235
Operator Certification Requirements, Levels 1–4 333‑061‑0245
Applications for Certification Levels 1–4 333‑061‑0250
Examinations for Certification, Levels 1–4 333‑061‑0260
Certificate Renewal Levels 1–4 333‑061‑0265
Fees 333‑061‑0270
Refusal, Suspension, or Revocation of Certification 333‑061‑0272
Suspension of Certification 333‑061‑0305
Domestic Well Program: Purpose 333‑061‑0310
Scope 333‑061‑0324
Area of Public Health Concern 333‑061‑0325
Domestic Well Tests 333‑061‑0330
Accredited Laboratories 333‑061‑0335
Sample Collection 333‑061‑0400
Reducing Lead in School Drinking Water 333‑061‑0510
Applicability of Cyanotoxin Rules 333‑061‑0520
Definitions 333‑061‑0530
Health Advisory Levels 333‑061‑0540
Cyanotoxin Monitoring 333‑061‑0550
Analytical Methods 333‑061‑0560
Reporting 333‑061‑0570
Public Notification 333‑061‑0580
Record Keeping
Last Updated

Jun. 8, 2021

Rule 333-061-0071’s source at or​.us