Cleanout plug: Diameter 1.5 to 2 inches

Component Specifications

Definition

A cleanout plug is a threaded or snap-fit component installed at the bottom of a P-trap (plumbing trap) in drainage systems. It provides a sealed access point for removing debris, sediment, or blockages that accumulate in the trap, ensuring proper flow and preventing clogs. Typically made from durable materials resistant to corrosion and chemical exposure, it features a hexagonal or slotted head for tool engagement during installation or removal. This component is critical for maintenance without disassembling the entire trap assembly.

Working Principle

The cleanout plug operates by creating a removable seal at the lowest point of the P-trap. When installed, it prevents water and gases from escaping, maintaining the trap's water seal to block sewer gases. During maintenance, it can be unscrewed or detached to allow access for cleaning tools (e.g., augers or brushes) to remove obstructions, after which it is re-sealed to restore system integrity.

Materials

Common materials include brass, stainless steel, PVC (polyvinyl chloride), ABS (acrylonitrile butadiene styrene), or polyethylene, selected based on corrosion resistance, durability, and compatibility with the trap material (e.g., metal or plastic). Specifications may include thread types (e.g., NPT - National Pipe Thread), sizes (e.g., 1.5 to 2 inches in diameter), and pressure ratings (e.g., up to 150 psi for standard applications).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	1.5 to 2 inches
Thread Type	NPT (National Pipe Thread)
Material Grade	ASTM B62 for brass, ASTM A276 for stainless steel, or ASTM D1784 for PVC
Pressure Rating	Up to 150 psi
Installation Torque	10-20 ft-lbs for metal, 5-10 ft-lbs for plastic

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 228-1, DIN 2999

Parent Products

This component is used in the following industrial products

Trap (P-Trap)

A plumbing device that maintains a water seal to prevent sewer gases from entering buildings while allowing wastewater to flow through.

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Engineering Analysis

Risks & Mitigation

Leakage due to improper sealing
Corrosion in harsh environments
Thread stripping from over-tightening
Blockage recurrence if not cleaned regularly

FMEA Triads

Trigger: Improper installation or worn threads
Failure: Leakage of water or sewer gases
Mitigation: Use thread sealant, follow torque specifications, and inspect threads during maintenance.

Trigger: Chemical exposure or corrosive fluids
Failure: Material degradation and plug failure
Mitigation: Select corrosion-resistant materials (e.g., stainless steel for aggressive environments) and conduct regular inspections.

Trigger: Debris accumulation not cleared
Failure: Reduced drainage flow or complete blockage
Mitigation: Schedule routine cleaning via the plug and use filters to catch large debris upstream.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Thread tolerance per ISO 228-1 or ASME B1.20.1; sealing surface flatness within 0.005 inches.

Test Method

Pressure testing per ASTM F477 for plastic or hydrostatic tests for metal plugs to verify leak resistance up to rated pressure.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Cleanout plug

Manufacturer profiles associated with Cleanout plug.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

How often should a cleanout plug be inspected?

Inspect annually or biannually in high-use systems; check for leaks, corrosion, or thread damage to ensure proper sealing and easy removal.

Can a cleanout plug be replaced if damaged?

Yes, replace with a compatible plug matching the trap's material, thread type, and size to maintain system integrity and prevent leaks.

What tools are needed to remove a cleanout plug?

Use a wrench or pliers for threaded plugs; avoid over-tightening plastic plugs to prevent cracking during installation or removal.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Cleanout plug