OAR 340-073-0060
Distribution Boxes, Drop Boxes, and Diversion Valves: Pipe Materials and Construction


(1)

Effluent Sewer Pipe: The effluent sewer must be constructed with materials in conformance with state building sewer standards. The effluent sewer pipe must have a minimum diameter of 3 inches. When the septic tank is fitted with an effluent filter, the minimum nominal diameter of piping may be reduced to 1-14 inches.

(2)

Underdrain pipe. Underdrain pipe must meet or exceed the requirements for Class 125 PVC pressure pipe as identified in ASTM Specification D 2241. The pipe and fittings must be marked as required by ASTM Specification D 2241. The underdrain pipe must be perforated in accordance with subsection (4)(d) of this rule or with 14-inch slots cut halfway through the pipe at 4 inches center to center.

(3)

Polyvinyl chloride (PVC) pressure transport pipe, pressure manifolds, and pressure lateral pipe and fittings must meet or exceed the current requirements for Class 160 PVC 1120 pressure pipe as identified in ASTM Specification D 2241. The pipe and fittings must be marked as required by ASTM Specification D 2241. For pipe diameters of 1 inch or less, the minimum pressure rating is 200 pounds per square inch (psi). For pipe diameters greater than 1 inch, the minimum pressure rating is 160 psi.

(4)

Distribution and Header Pipe and Fittings.

(a)

Polyethylene distribution pipe in 10 foot lengths and header pipe in lengths of 10 feet or greater must meet the current ASTM Specification F 405. Pipe and fittings must also pass a deflection test withstanding 350 pounds per foot without cracking or collapsing using the method in ASTM 2412. Pipe used in absorption facilities must be heavy duty. Markings must meet requirements in ASTM F 405.

(b)

Polyvinyl chloride (PVC) distribution and header pipe and fittings must meet the most current ASTM Specification D 2729. Pipe and fittings must pass a deflection test withstanding 350 pounds per foot without cracking or collapsing using the method found in ASTM 2412. Markings must meet requirements in ASTM Specification D 2729.

(c)

Polyethylene smooth wall distribution and header pipe in 10-foot length and fittings must meet the most current ASTM Specification F 810. Pipe and fittings must also pass a deflection test of 350 pounds per foot without cracking or collapsing by using the method found in ASTM 2412. Markings shall meet the requirements in ASTM Specification F 810, Section 9.

(d)

The three types of plastic pipe described above must have two rows of holes spaced 120 degrees apart and 60 degrees on either side of a center line. For distribution pipe, a line of contrasting color must be provided on the outside of the pipe along the line furthest away and parallel to the two rows of perforations. Durable ink markings must cover at least 50% of the pipe. Markings may consist of a solid line, letters, or a combination of the two. Intervals between markings must not exceed 12 inches. The holes of each row may not be more than 5 inches on center and must have a minimum diameter of 12 inch.
[Publications: Publications referenced are available from the agency.]

Source: Rule 340-073-0060 — Distribution Boxes, Drop Boxes, and Diversion Valves: Pipe Materials and Construction, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=340-073-0060.

340‑073‑0025
Tank Construction
340‑073‑0026
Septic Tanks
340‑073‑0030
Dosing Septic Tank
340‑073‑0035
Distribution Boxes, Drop Boxes, and Diversion Valves: Distribution Boxes
340‑073‑0040
Distribution Boxes, Drop Boxes, and Diversion Valves: Drop Boxes
340‑073‑0041
Distribution Boxes, Drop Boxes, and Diversion Valves: Filter Fabric
340‑073‑0045
Distribution Boxes, Drop Boxes, and Diversion Valves: Diversion Valves
340‑073‑0050
Distribution Boxes, Drop Boxes, and Diversion Valves: Dosing Tanks
340‑073‑0055
Distribution Boxes, Drop Boxes, and Diversion Valves: Dosing Assemblies: Effluent Pumps, Controls and Alarms, and Dosing Siphons
340‑073‑0056
Distribution Boxes, Drop Boxes, and Diversion Valves: Effluent Filters
340‑073‑0060
Distribution Boxes, Drop Boxes, and Diversion Valves: Pipe Materials and Construction
340‑073‑0065
Non-water-Carried Waste Disposal Facilities, Materials, and Construction: Privies and Portable Toilet Shelters
340‑073‑0070
Non-water-Carried Waste Disposal Facilities, Materials, and Construction: Unsealed Earth Pits for Privies
340‑073‑0075
Non-water-Carried Waste Disposal Facilities, Materials, and Construction: Self-Contained Nonwater-Carried Toilet Facilities
340‑073‑0080
Non-water-Carried Waste Disposal Facilities, Materials, and Construction: Construction of Gray Water Waste Disposal Sumps
340‑073‑0085
Non-water-Carried Waste Disposal Facilities, Materials, and Construction: Flexible Membrane Liners for Sand Filters Treating Septic Tank Effluent
Last Updated

Jun. 8, 2021

Rule 340-073-0060’s source at or​.us