Westlake Pipe & Fittings

What Westlake Pipe & Fittings does

Westlake Pipe & Fittings is a North American manufacturer of PVC pipe, fittings, and proprietary joint systems serving critical infrastructure end markets. The company operates as an operating division of Westlake Corporation (NYSE: WLK) and traces its origins to 1970, with the current brand unified over more than 50 years of consolidation of acquired product lines including North American Pipe, NAPCO, LASCO, Royal, Plastic Trends, Foundations, and Certa-Set. From its Houston, Texas headquarters, the business runs 23 manufacturing and distribution facilities across the United States and Canada, producing Schedule 40/80 PVC and CPVC pressure pipe and fittings, IPS and CIOD municipal pressure pipe, sewer pipe (SDR 35/26, BDS solvent weld, foam core DWV), electrical conduit (rigid PVC, ENT, trenchless), water well casing and drop pipe, and pool and spa components.

The company's technical platform centers on patented restrained-joint architectures. Certa-Lok is a bidirectional spline-lock system in which precision-machined grooves on pipe and inside fitting bells accept a nylon spline to create a restrained joint assembled in minutes, targeted at trenchless installation methods (horizontal directional drilling, static pipe bursting). Certa-Set is a leak-free PVC irrigation system designed for low-row crop agriculture, using mechanized processes that reduce labor and permit cultivation under harvested rows without moving pipe. Certa-Com applies the Certa-Lok joint to trenchless electrical conduit. The patent estate covers restrained joint design and manufacturing, retrieval machines, basement waterproofing, foam core pipe, and irrigation riser/sled assemblies, with international filings in Canada, Mexico, China, and Europe. Sub-brands including Certa-Lok, Certa-Set, Certa-Com, Kwik-Set, AquaMax, AquaSpring, RadonClear, NAPCORE, NAPBLOC, and Inserta-Tee support specialization across the six market segments.

Westlake Pipe & Fittings operates a B2B/industrial go-to-market that combines a distributor network (with stock inventory at distributor yards and minimum order quantities of one truckload), direct enterprise sales via an expert field force, inside sales with technical services support, and a 24/7 online parts catalog for SMB and individual buyers. Pricing is quote-based rather than publicly disclosed, with stock yard unit pricing for distributor shipments and firm 15-day pricing on contractor job quotes. End-customer verticals include municipal water and wastewater utilities, plumbing and industrial contractors, water well installers, agricultural growers and irrigation contractors, golf and turf operators, pool and spa builders, and electrical utilities/contractors. As of June 2025, the company consolidated warranty terms under a unified Westlake Pipe & Fittings warranty that supersedes all prior warranties from the legacy acquired brands.

Name

Westlake Pipe & Fittings

Legal name

Westlake Pipe & Fittings Corporation

Website

https://westlakepipe.com

Company type

Public

Founded year

1970

Operating status

Operating

Headcount range

251–500 employees

Short description

Westlake Pipe & Fittings is a North American division of Westlake Corporation that manufactures PVC pipe, fittings, and proprietary restrained-joint systems (Certa-Lok, Certa-Set, Certa-Com) for municipal water/wastewater, plumbing, water well, agricultural irrigation, pool/spa, and electrical conduit markets across 23 facilities.

Ownership category

akta.pro rank

Product category

PVC Pipe & Fittings Manufacturing

NAICS

Plastics Pipe and Pipe Fitting Manufacturing (326122), Water and Sewer Line and Related Structures Construction (23711)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623)

akta.pro primary industry

Water & Sewer Pipe & Fittings (PVC/HDPE/PP) (IMANADAA)

akta.pro secondary industries

Trenchless/Directional Drilling Ducts & Conduit (IMANADAI), Water Supply & Distribution Components (Manifolds, Stops, Service Lines) (IMADALAF), Pipe Fittings, Couplings & Connectors (IMADALAD)

Keywords

• PVC pipe manufacturing
• Pipe fittings systems
• Municipal water infrastructure
• Agricultural irrigation systems
• Electrical conduit products

Headquarters

HQ city

Houston

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. PVC Pipe Sales: Core revenue from manufacturing and selling PVC pipe products across multiple schedules (Schedule 40, Schedule 80, IPS, etc.) and product families. Sold in various configurations including pressure pipe, DWV pipe, well casing, irrigation pipe, and electrical conduit. Revenue generated through distributor network and direct sales.
2. PVC Fittings Sales: Comprehensive range of PVC fittings for all market segments including municipal, plumbing, industrial, water well, agriculture, pool/spa, and electrical applications. Includes molded, fabricated, and specialty fittings.
3. Proprietary System Sales: Proprietary branded systems including Certa-Lok®, Certa-Set®, Certa-Com® products with premium pricing due to patented technology and specialized applications.
4. Technical Services Support: Technical support, design consultation, and application engineering services provided to support product sales and ensure proper installation.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels6 records

Core offering

Westlake Pipe & Fittings manufactures and sells a comprehensive range of PVC pipe and fittings across six market segments: Municipal (potable water, sewer force main, gravity sewer), Plumbing & Industrial (DWV, pressure, HVAC/gas venting), Water Well (casing and drop pipe), Agriculture & Irrigation (including the proprietary Certa-Set® system), Pool & Spa, and Electrical (rigid conduit, ENT, Certa-Com® trenchless). Its proprietary Certa-Lok® spline-lock restrained joint technology provides differentiated trenchless installation capability.

Product overview

Westlake Pipe & Fittings is a manufacturer of PVC pipe and fittings serving critical infrastructure across North America. The company offers a comprehensive portfolio organized into six market segments: Municipal Systems (potable water, sewer force main, gravity sewer), Plumbing & Industrial Systems (DWV, pressure, HVAC/gas venting), Water Well Systems (casing and drop pipe), Agriculture & Irrigation Systems (including the proprietary Certa-Set® system), Pool & Spa Systems, and Electrical Systems. Core proprietary technologies include Certa-Lok® (bidirectional spline-lock restrained joint system for trenchless applications) and Certa-Set® (leak-free irrigation system for agricultural applications). Product lines span Schedule 40/80 PVC and CPVC pressure fittings, IPS and CIOD pressure pipe, sewer pipe (SDR 35/26, BDS, foam core), electrical conduit (rigid, ENT, trenchless), and specialized products like radon vent, gas vent, and pool equipment. The company operates 23 manufacturing and distribution facilities across North America as a division of Westlake Corporation (NYSE: WLK).

Differentiator

Problem solved

Functional benefit

Brands

• Certa-Lok®: Proprietary bidirectional restrained joint technology using precision-machined grooves on pipe and inside fittings/bells, with a nylon spline creating a leak-free joint. Used in municipal water, sewer, and water well applications.
• Certa-Set®
• Kwik-Set®
• AquaMax™
• Certa-Com®
• AquaSpring™
• RadonClear™
• NAPCORE™
• NAPBLOC™
• Inserta-Tee®

Products and services

• Municipal PVC Pipe & Fittings Systems Comprehensive PVC pipe and fittings systems for municipal water and wastewater applications, including pressurized potable water, sewer force main, gravity sewer, and specialty municipal systems. Used by municipal utilities and engineering contractors for water and sewer infrastructure projects.
• Plumbing & Industrial PVC Pipe & Fittings Systems Complete range of PVC pipe and fittings for pressure, drain-waste-vent (DWV), HVAC & gas venting, and gravity sewer & drain applications. Designed for commercial and industrial plumbing contractors and distributors.
• Water Well PVC Pipe Systems Industry's most complete PVC well casing and well drop pipe offerings, including Certa-Lok® restrained-joint and Kwik-Set® products, for residential, agricultural, and commercial water well applications.
• Agriculture & Irrigation PVC Pipe & Fittings Systems Corrosion- and chemical-resistant PVC irrigation pipe and fittings for sports field, golf course, commercial, residential, and agricultural irrigation, including the proprietary Certa-Set® leak-free system for low-row crop irrigation.
• Pool & Spa PVC Fittings & Sweeps Complete line of PVC fittings for pool and spa applications, plus molded energy-efficient pool sweeps, for residential and commercial pool/spa builders and distributors.
• Electrical PVC Conduit Systems Full line of electrical PVC pipe and fittings products, including rigid PVC conduit, PVC duct pipe/fittings, ENT PVC conduit, NAPBLOC™ conduit spacers, and Certa-Com® trenchless conduit, for exposed and buried electrical installations.
• Certa-Lok® Spline-Lock Pipe & Fittings Proprietary bidirectional restrained joint pipe and fittings using precision-machined grooves and a nylon spline that locks pipe to fitting. Ideal for trenchless installation including horizontal directional drilling (HDD), static pipe bursting, and other no-dig applications across municipal, water well, and electrical markets.
• Certa-Set® PVC Irrigation System Innovative leak-free PVC irrigation system designed to increase agricultural growers' profitability through water savings and reduced labor. Features patented joints, mechanized processes, and components such as Certa-Set® PVC Irrigation Pipe, Certa-Set® Sled Riser Assembly, and Certa-Set® Mainline Coupling for uniform water distribution in low-row crops.
• Certa-Com® Trenchless Conduit Pipe PVC conduit pipe featuring Certa-Lok® bidirectional restrained joint system designed specifically for trenchless electrical installations, enabling utilities and electrical contractors to install conduit without open-cut trenching.
• Rigid PVC Conduit Pipe PVC conduit pipe designed to meet utility and communication line requirements for both exposed and buried electrical installations, protecting wires for reliable power and communication.
• Schedule 40 PVC Pressure Pipe PVC pipe for pressure applications in plumbing, industrial, irrigation, and pool & spa systems.
• Schedule 40 PVC Pressure Fittings Fittings designed to meet requirements for plumbing, industrial, irrigation, and pool & spa pressure applications, used as a complete PVC pressure system with Schedule 40 pipe.
• Schedule 80 PVC Fittings Robust Schedule 80 PVC fittings used with Schedule 80 pipe to form a complete PVC system for plumbing and industrial applications requiring higher pressure ratings.
• Schedule 80 CPVC Fittings High-resistance CPVC fittings suitable for high-pressure and high-temperature industrial applications where standard PVC is insufficient.
• CPVC Nipples Durable, corrosion-resistant CPVC nipple connectors used to join sections of CPVC pipe in industrial applications.
• Swing Joints Flexible and adaptable PVC swing joints that allow easy positioning and alignment of sprinklers and irrigation equipment in turf and agricultural irrigation systems.
• Swivel Joints PVC swivel joints providing 360° rotation capability for direction changes and system adjustments in irrigation applications.
• Irrigation Fittings Complete range of PVC fittings designed to meet the unique requirements and challenges of irrigation systems, including turf, agricultural, and landscape applications.
• Slo-Close Valves PVC slo-close valves designed to prevent water hammer and system damage, improving safety and extending irrigation system life.
• Heavy Turf Fittings Rugged PVC fittings designed to withstand the harshest conditions, ideal for sports field irrigation applications.
• PVC Inserts Barbed PVC fittings designed to connect and secure various types of pipes and tubes, ensuring leak-free connections in irrigation and similar systems.
• Energy-Efficient Pool Sweeps Molded PVC pool sweeps designed for optimal flow performance in pool and spa applications, exceeding California energy code requirements.
• Pool Fittings High-quality injection-molded PVC fittings frequently used in residential and commercial pool and spa industry applications.
• Certa-Lok® Well Casing & Drop Pipe PVC well casing and drop pipe products with unique spline-lock fittings that allow fast, easy assembly without additional tools, significantly reducing assembly time in water well applications.
• Kwik-Set® Well Drop Pipe PVC well drop pipe product line engineered for water well installations, designed for quick assembly.
• AquaSpring® AWWA C900 IB PVC Pipe AWWA C900 integral bell PVC pressure pipe with push-on joint, used by municipal water utilities for water distribution systems.
• PVCO AquaMax™ C909 IB Pipe PVCO (molecularly oriented PVC) pressure pipe meeting AWWA C909 standard with improved strength and toughness for municipal pressure water systems.
• IPS Pressure Pipe Iron Pipe Size (IPS) dimension ratio PVC pressure pipe for various pressure applications in municipal and industrial markets.
• CIOD PVC Pressure Fittings Cast Iron O.D. (CIOD) PVC pressure fittings used in municipal water systems.
• SDR 35/26 Sewer Pipe with Gasket Joint PVC sewer pipe with gasket joints designed for gravity sewer applications in municipal and building sewer systems.
• GVS-65/GVS-90 Gas Vent Pipe PVC pipe for gas venting applications meeting GVS-65 and GVS-90 industry standards.
• RadonClear™ Radon Vent Pipe PVC pipe and fittings system designed for radon gas evacuation from buildings (radon mitigation).
• BDS Solvent Weld Sewer Pipe Building Drainage and Sewer (BDS) PVC pipe with solvent weld joints, used for building sewer applications.
• NAPCORE™ Foam Core DWV Pipe PVC foam core drain, waste, and vent (DWV) pipe designed for reduced weight and material cost in plumbing applications.
• NAPSYS™ Low-Rise DWV Pipe Low-rise PVC drain, waste, and vent (DWV) pipe system designed for applications with limited space for pipe penetration, such as in low-rise buildings.
• NAPSYS™ High-Rise DWV Pipe High-rise PVC drain, waste, and vent (DWV) pipe system engineered for tall-building drainage applications.
• ENT PVC Conduit Electrical Non-Metallic Tubing (ENT) PVC conduit for electrical installations in buildings.
• Inserta-Tee® Lateral Connection Fitting PVC Inserta-Tee® lateral connection fittings used for sewer pipe taps in municipal and building sewer applications.
• NAPBLOC™ Conduit Spacers NAPBLOC™ spacer system used in PVC conduit installations to maintain proper spacing and alignment of multiple conduits.
• PVC Cements and Primers PVC cement and primer products used for solvent welding of PVC pipe and fittings across plumbing, industrial, irrigation, and other applications.
• Technical Services & Application Engineering Technical support, design consultation, and application engineering services provided to distributors, contractors, engineers, and end users to support proper specification and installation of Westlake Pipe & Fittings products.

Quantifiable outcome

• Design life of 100+ years for PVC pipe products
• +2 more outcomes

Named customers3 records

Segments6 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• JM Eagle: Largest manufacturer of PVC pipe in North America, offering Schedule 40/80 pressure pipe, sewer, and electrical conduit. Direct competitor in nearly every PVC pipe category Westlake serves.
• IPEX (Aliaxis): PVC, CPVC, and PEX pipe and fittings manufacturer serving plumbing, electrical, municipal, and industrial markets across North America. Canadian-based peer with comparable product portfolio and trenchless offerings.
• Diamond Plastics Corporation: PVC pipe manufacturer specializing in large-diameter water and sewer pipe including C900/C905/C909 products. Directly competes with Westlake's municipal segment and AquaSpring™/AquaMax™ lines.
• Cresline Plastic Pipe: PVC and polyethylene pipe manufacturer serving plumbing, irrigation, water well, and industrial markets. Mid-tier competitor with overlapping product lines, particularly in pressure pipe and water well.
• Advanced Drainage Systems (ADS): Leading manufacturer of corrugated plastic pipe (primarily HDPE) for stormwater, drainage, and on-site wastewater. Competes with Westlake in gravity sewer and drainage applications and represents the principal HDPE substitution threat.
• Charlotte Pipe and Foundry: Manufacturer of PVC and cast iron pipe and fittings for plumbing, drainage, and industrial applications. Comparable product breadth and overlapping customer base in plumbing and DWV.
• Genova Products: PVC pipe and fittings manufacturer serving plumbing, drainage, water well, and irrigation markets. Comparable mid-tier footprint with overlapping distribution channels through plumbing wholesalers.

Regional players

• Pipelife (Wienerberger): European-based pipe manufacturer offering PVC, PE, and PP solutions for water, sewer, drainage, and cable protection. Comparable product portfolio but primarily serves Europe; relevant for technology benchmarking and international expansion.

Broad incumbents

• Mueller Industries: Diversified manufacturer of copper, brass, aluminum, and plastic products including pipe fittings. Competes in plumbing and industrial fittings and offers an alternative material set to Westlake's PVC.
• U.S. Pipe (Forterra): Leading manufacturer of ductile iron pipe and fittings for water and wastewater infrastructure. Represents the primary non-plastic competitor in large-diameter municipal water applications.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/c/WestlakePipeFittings
• Facebookfacebook.com/westlakepipe
• LinkedInlinkedin.com/company/westlakepipe

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Westlake Pipe & Fittings