National Clay Pipe Institute
National Clay Pipe Institute (NCPI) is a U.S. not-for-profit trade association founded in 1917 that represents vitrified clay pipe manufacturers, providing research, engineering publications, design calculators, and PDH-qualifying training to municipalities, engineers, contractors, and maintenance professionals specifying gravity sanitary sewer systems.
- Company typePrivate
- Founded1917
- HeadquartersElkhorn, United States
- Headcount1–10
- GTM typeB2B
- OfferingServices
What National Clay Pipe Institute does
The National Clay Pipe Institute (NCPI) is a not-for-profit U.S. trade association founded in 1917 and headquartered in Elkhorn, Wisconsin. The organization represents U.S. manufacturers of Vitrified Clay Pipe (VCP) and serves as the industry's central technical resource, conducting research, publishing engineering manuals, and delivering training workshops that influence pipe material specification decisions made by municipal engineers, civil engineering firms, contractors, and operations & maintenance professionals. NCPI's core product surface consists of authoritative publications (the VCP Engineering Manual, Installation & Inspection Handbook, Operations & Maintenance Handbook, Low Pressure Air Test Handbook, CCTV Inspection Handbook, and a VCP vs. PVC comparison guide), three web-based engineering calculators (Trenchload using Marston's equation, Hyflow using Manning's equation, and Leastcost for life-cycle cost analysis), PDH-qualifying training workshops delivered online or in-person, a YouTube video library, and a Technical Papers library.
NCPI does not sell pipe products directly; distribution occurs through its member companies, and purchases are routed to that member roster. The business model is membership-funded: U.S. VCP manufacturers contribute dues that support NCPI's research, standards development, and educational activities. NCPI has worked with ASTM Committee C04 since the committee's 1904 formation and has contributed to standards governing VCP manufacturing, joint performance, air testing, jacking pipe, and cleaning methods, including ASTM C1920, the first published cleaning standard for any sewer pipe material. Its technology moat rests on 100+ years of accumulated research output, the VCP material's documented 200+ year U.S. service life, leak-free compression joints, 18,000 psi compressive strength for trenchless applications, and the ISO 14001-Compliant Certification NCPI achieved in 2011 as the first organization in the buried infrastructure industry to do so.
National Clay Pipe Institute firmographics
Firmographics- Name
- National Clay Pipe Institute
- Legal name
- National Clay Pipe Institute
- Website
- https://ncpi.org
- Company type
- Private
- Founded year
- 1917
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- National Clay Pipe Institute (NCPI) is a U.S. not-for-profit trade association founded in 1917 that represents vitrified clay pipe manufacturers, providing research, engineering publications, design calculators, and PDH-qualifying training to municipalities, engineers, contractors, and maintenance professionals specifying gravity sanitary sewer systems.
- Ownership category
- akta.pro rank
National Clay Pipe Institute industry classification
Industry- Product category
- Sanitary Sewer Pipe Industry Association
- NAICS
- Water and Sewer Line and Related Structures Construction (237110), Concrete Pipe Manufacturing (327332)
- SIC
- Water, Sewer, Pipeline, Comm & Power Line Construction (1623)
- akta.pro primary industry
- Gravity Sewer Collection Networks (Sanitary Sewers) (EUANACAA)
- akta.pro secondary industries
- Sewer Inspection, Condition Assessment & Monitoring (CCTV, Sensors) (EUANACAG), Sewer Inspection & Condition Assessment (CCTV, Smoke/Dye Testing) (BPALAMAH), Drain & Sewer Pipe Descaling (HSAOABAJ), Storage & Conveyance Structures (Reservoirs, Tanks, Culverts, Tunnels) (IMAFAGAE)
Keywords
Where National Clay Pipe Institute is headquartered
LocationHeadquarters
- HQ city
- Elkhorn
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
National Clay Pipe Institute business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Marketing or Sales, Operations, Others
Revenue model
- Member Company Membership/Services: NCPI is a not-for-profit organization funded by its member companies (U.S. manufacturers of Vitrified Clay Pipe). Revenue comes from membership contributions which support the organization's research, education, and technical support activities.
- Educational Services (Free): NCPI provides free training workshops qualifying for Professional Development Hours (PDH), available at no cost to attendees. This educational outreach is funded through member company support and promotes VCP specification.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Pay-as-you-go | Free Training Workshops for engineers, contractors, and municipal professionals |
Go-to-market motion2 records
Distribution channels1 record
Marketing channels6 records
National Clay Pipe Institute product offering
Product offeringCore offering
The National Clay Pipe Institute is a not-for-profit trade association that provides research, education, and technical support for the U.S. Vitrified Clay Pipe (VCP) sanitary sewer industry. Its offerings include authoritative engineering publications, online design calculators (Trenchload, Hyflow, Leastcost), free PDH-qualifying training workshops, and contributions to ASTM standards — all directed at engineers, contractors, municipalities, and maintenance professionals who specify, install, or operate gravity sanitary sewer systems.
Product overview
The National Clay Pipe Institute (NCPI) is a not-for-profit trade association representing U.S. manufacturers of Vitrified Clay Pipe (VCP) for gravity sanitary sewers. Rather than a software product company, NCPI provides a portfolio of technical resources, engineering tools, and educational services. The core offerings include a comprehensive set of technical publications (Engineering Manual, Installation & Inspection Handbook, Operations & Maintenance Handbook, and specialized handbooks covering CCTV inspection and air testing), online engineering calculators (Trench Load, Hyflow, and Leastcost) accessible through their Toolbox program, and professional training workshops that qualify for PDH credits. These resources are designed to support engineers, contractors, inspectors, and municipalities in the specification, design, installation, and maintenance of VCP sanitary sewer systems. The YouTube channel and Technical Papers library provide additional educational content covering manufacturing, installation, and trenchless technologies.
Differentiator
Problem solved
Functional benefit
Products and services
- VCP Engineering Manual Authoritative engineering reference manual for systems engineers, designers, and maintenance professionals covering all aspects of Vitrified Clay Pipe technology, including material properties, design calculations, ASTM standards, installation specifications, and lifecycle considerations.
- VCP Installation & Inspection Handbook Quick-reference handbook for contractors, inspectors, and engineers covering proper VCP installation techniques, trench construction, bedding methods, and inspection procedures.
- VCP Operations & Maintenance Handbook Comprehensive handbook for maintenance professionals covering operational procedures, cleaning techniques, inspection practices, CCTV assessment, and long-term maintenance of installed VCP pipelines.
- Trench Load Calculator (Trenchload) Online engineering design program using Marston's equation to calculate soil loads on rigid conduits, with safety factor calculations for various bedding classes and live load considerations. Used by engineers designing VCP sewer installations.
- Hyflow Calculator Online hydraulic flow calculator using Manning's Open Channel Flow equations to determine pipe diameter solutions and flow characteristics for VCP sanitary sewer design.
- Leastcost Calculator Online life cycle cost analysis tool using historic inflation and interest rates to compare pipe material options over the full service life of a sanitary sewer installation.
- Training Workshops (PDH-qualifying) Free professional development programs qualifying for PDH credits, covering pipe manufacturing, materials comparison, trench design, installation, inspection, trenchless installation methods, operations & maintenance, and CCTV analysis. Delivered to engineers, contractors, and municipal professionals.
- Hydraulic Calculator Request Service Request-based service through which engineers can obtain hydraulic calculations and technical support from NCPI for VCP sanitary sewer design applications.
Quantifiable outcome
- 5,000 psi hydro-jetting pressure allowed (3X+ competitive products)
- +3 more outcomes
Companies that use National Clay Pipe Institute
Customer profileNamed customers7 records
Segments4 records
Ideal customer profiles4 records
National Clay Pipe Institute technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
National Clay Pipe Institute partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered minor and core.
- Ohio State UniversityminorPartnership from early 1940s through mid-1950s for research into manufacturing methods, testing, and joint design. This research led to the introduction of compression joints that were widely accepted by U.S. manufacturers.
- Amster Howard (Soil and Pipeline Expert)minorPartnership in the 2010s to conduct research into Haunch Support of pipe embedment. Findings led to new educational materials for installers and inspectors ensuring proper installation with uniform circumferential support.
- Various MunicipalitiesminorNCPI partners with municipalities in field research projects designed to address specific concerns. Research conducted with real-world municipal installations helps validate and improve VCP specifications and installation practices.
- ASTM International (Committee C04)coreNCPI has worked with ASTM Committee C04 since its formation in 1904. The clay pipe industry formed the C04 committee that created the first specification for sewer design and construction. NCPI continues to contribute to ASTM standards development for VCP.
Scale indicators5 records
Recent moves6 records
Expansion highlights5 records
National Clay Pipe Institute competitors and assessment
Company assessmentBroad incumbents
- Water Environment Federation: WEF is a broad water quality professional association serving the entire wastewater industry. While not a pipe-material trade group, WEF shapes operator and municipal thinking on SSO reduction and infrastructure management — topics where NCPI's VCP positioning is directly relevant.
- American Water Works Association: AWWA is the largest water-sector standards-developing organization in North America. While focused more on water supply than sewer collection, AWWA's standards and educational programs overlap with NCPI's target audience of municipal utility professionals.
Emerging players
- North American Society for Trenchless Technology: NASTT is the leading industry organization for trenchless technology, a key installation method for which NCPI's VCP Jacking Pipe is uniquely suited. NCPI actively presents at NASTT's NO-DIG Show, making it a complementary ecosystem peer rather than a direct competitor.
Others
- National Utility Contractors Association: NUCA represents utility construction contractors, including the contractors that actually install VCP and competing pipe materials. NCPI engages NUCA at conferences and through its training workshops, making NUCA a complementary customer-channel peer for NCPI's specification-influence activities.
Direct peers
- American Concrete Pipe Association: The American Concrete Pipe Association (ACPA) is the trade association for concrete pipe manufacturers, the most direct rigid-pipe competitor to VCP in gravity sanitary sewer applications. ACPI publishes similar design manuals, engineering calculators, and educational content targeting the same engineering and municipal specifier audience NCPI serves.
- Plastics Pipe Institute: The Plastics Pipe Institute (PPI) is the trade association representing manufacturers of plastic pipe products, the primary material competitor to NCPI's vitrified clay pipe in gravity sewer applications. Both organizations serve as technical authorities, publish design resources, and influence municipal pipe specification decisions.
- Ductile Iron Pipe Research Association: DIPRA represents ductile iron pipe manufacturers and serves as a material trade association in water and sewer applications. Like NCPI, it provides technical publications, design tools, and specification support to engineers and municipalities, making it a directly comparable peer organization.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
National Clay Pipe Institute social profiles
Digital presenceNational Clay Pipe Institute compliance and trust
Trust signalCompliance1 record
National Clay Pipe Institute financial estimates
Financial estimateRevenue estimate
Valuation estimate
National Clay Pipe Institute leadership team
Management profileNumber of profiles
Profiles2 records
National Clay Pipe Institute funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
National Clay Pipe Institute M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about National Clay Pipe Institute
What does National Clay Pipe Institute do?
The National Clay Pipe Institute is a not-for-profit trade association that provides research, education, and technical support for the U.S. Vitrified Clay Pipe (VCP) sanitary sewer industry. Its offerings include authoritative engineering publications, online design calculators (Trenchload, Hyflow, Leastcost), free PDH-qualifying training workshops, and contributions to ASTM standards — all directed at engineers, contractors, municipalities, and maintenance professionals who specify, install, or operate gravity sanitary sewer systems.
Is National Clay Pipe Institute a public or private company?
National Clay Pipe Institute is a private company. It is classified as nonprofit foundation owned and is currently operating.
When was National Clay Pipe Institute founded?
National Clay Pipe Institute was founded in 1917. It employs 1 to 10 people.
Where is National Clay Pipe Institute based?
National Clay Pipe Institute is headquartered in Elkhorn, United States, in the North America region.
How does National Clay Pipe Institute make money?
Two revenue lines are on record. Member Company Membership/Services are the primary driver. The others are educational Services (Free).
Who are National Clay Pipe Institute's main competitors?
Broad incumbents on record are Water Environment Federation and American Water Works Association. North American Society for Trenchless Technology is listed as an emerging player. National Utility Contractors Association is listed as an others. Direct peers are American Concrete Pipe Association, Plastics Pipe Institute and Ductile Iron Pipe Research Association.
Does National Clay Pipe Institute have an API?
No public API is recorded for National Clay Pipe Institute.
What industry is National Clay Pipe Institute in?
National Clay Pipe Institute's product category is Sanitary Sewer Pipe Industry Association. Its primary akta.pro industry code is EUANACAA, Gravity Sewer Collection Networks (Sanitary Sewers), with a secondary code of EUANACAG, Sewer Inspection, Condition Assessment & Monitoring (CCTV, Sensors). Its NAICS code is 237110 and its SIC code is 1623.