GPK Products

What GPK Products does

GPK Products, Inc. is a privately held, Fargo, North Dakota-based manufacturer of PVC pipe fittings, founded in 1972 and operating under the sub-brand Indiana Seal Company. The company engineers and fabricates both molded (injection-molded) and custom-fabricated PVC fittings, offering a catalog of more than 5,600 SKUs in sizes up to 48 inches for water, drainage, and infrastructure field applications. Its technology base is conventional PVC injection molding plus custom fabrication, with manufacturing concentrated at its Fargo headquarters.

GPK Products generates revenue through one-time hardware sales of its molded and fabricated PVC fittings, with all pricing handled on a quote basis through its sales-rep and direct-customer-service channels. The go-to-market relies on a network of 15+ independent sales representative companies covering all US states and Canadian provinces, supplemented by direct sales from Fargo for select territories (North Dakota, Louisiana, Texas, and select Canadian provinces) and a US warehouse network for quick delivery. Marketing presence is modest, limited to Facebook, Instagram, and an instructional video library. The company employs 11-50 people and is founder/management-owned with no disclosed institutional investors.

Recent activity has centered on incremental product-line expansion — Universal Adapter (4" and 6", Dec 2025), 8" HWS Two-Way Cleanouts (Jul 2025), 6" Drain Grate (Feb 2024), and molded IPS/HWS Double WYEs (Dec 2023) — plus a 2026 addition of a new sales rep covering Kansas and Western Missouri. Technology integrations are limited to UPS shipping and CH Robinson LTL tracking. No AI/ML capabilities, funding rounds, M&A activity, leadership changes, or regulatory actions are disclosed.

Name

GPK Products

Legal name

GPK Products, Inc.

Website

https://gpk-fargo.com

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

11–50 employees

Short description

GPK Products is a privately held, Fargo-based manufacturer founded in 1972 that engineers and fabricates PVC pipe fittings — over 5,600 molded and fabricated SKUs up to 48 inches — sold to contractors, distributors, and infrastructure operators across the US and Canada via a network of independent sales representatives.

Ownership category

akta.pro rank

Product category

PVC Pipe Fittings Manufacturing

NAICS

Plastics Pipe and Pipe Fitting Manufacturing (326122), Plastics Pipe, Pipe Fitting, and Unlaminated Profile Shape Manufacturing (32612)

akta.pro primary industry

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

akta.pro secondary industries

Plumbing & Building Drain/Waste/Vent (DWV) Pipe & Fittings (IMANADAG), Pipe Accessories & Joining Systems (Couplings, Gaskets, Solvent Cement, Fusion Fittings) (IMANADAJ)

Keywords

• PVC pipe fittings
• Molded PVC fittings
• Custom PVC fabrication
• Drainage fittings
• Infrastructure pipe components

Headquarters

HQ city

Fargo

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Infrastructure, Marketing or Sales

Revenue model

1. PVC Fittings and Fabricated Products: One-time product sales of PVC fittings and custom fabricated pipe products. The company manufactures and sells molded and fabricated fittings to customers across various industries.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

GPK Products engineers, molds, and fabricates PVC pipe fittings for water, drainage, and infrastructure field applications. The company offers a catalog of more than 5,600 molded and fabricated fittings in sizes up to 48 inches, supplemented by custom PVC fabrication services for project-specific requirements. Products are distributed through a network of independent sales representatives and regional warehouses across the United States and Canada.

Product overview

GPK Products is America's Number One Producer of PVC Fittings, offering a unified portfolio centered around molded and fabricated PVC pipe fittings. Their core product line consists of over 5,600 molded and fabricated fittings cataloged in sizes through 48 inches. The portfolio includes standard molded fittings (such as double WYEs in IPS and HWS configurations), fabricated fittings for custom applications, and specific products like Universal Adapters, drain grates, and cleanouts. They also provide custom PVC pipe fabrication and fitting services for unique project needs. The product line serves nearly every field application in the PVC piping industry, supported by a national network of sales and warehouse locations.

Differentiator

Problem solved

Functional benefit

Products and services

• Universal Adapter (4" & 6" SDR or DWV Hub to Corr. HDPE) Adapter fitting designed for connecting SDR or DWV Hub to Corrugated HDPE pipe, available in 4-inch and 6-inch sizes. Targeted at contractors and installers working with mixed PVC and HDPE piping systems.
• 8" HWS Two-Way Cleanouts Molded SDR-26 Heavy Wall Steel (HWS) two-way cleanout fittings in 8-inch size, designed for maintenance access in PVC piping systems. Targeted at infrastructure and drainage contractors.
• 6" Drain Grate Drainage grate product in 6-inch size for surface water collection and drainage applications. Targeted at drainage and infrastructure installers.
• Molded IPS Double WYEs (315-0044) Injection molded double wye fittings in IPS (Iron Pipe Size) configuration, part of the 315 series product line. Used in PVC piping systems for drainage and infrastructure applications.
• Molded HWS Double WYEs (915-0044) Injection molded double wye fittings in HWS (Heavy Wall Steel) configuration, part of the 915 series product line. Used in PVC piping systems for drainage and infrastructure applications.
• Custom PVC Pipe Fabrication Custom fabrication services for PVC pipe and fittings engineered to meet specific project requirements and unique field application needs beyond the standard catalog offerings. Targeted at contractors and infrastructure projects with non-standard specifications.
• PVC Fittings Catalog Full catalog of molded and fabricated PVC pipe fittings in sizes up to 48 inches, covering nearly every field application in the PVC pipe industry. Includes over 5,600 fitting configurations serving water, drainage, and infrastructure installations.

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature2 records

Partnerships

20 partnerships are on record, tiered standard.

• Specified Sales Associates LLCstandardChannel Partner/ Reseller/ DistributorSales representative company covering Florida (excluding Panhandle west of Apalachicola River). Contact: Scott Shugart. Handles sales and orders for the territory.
• Coastal Sales CompanystandardChannel Partner/ Reseller/ DistributorSales representative covering North Carolina and South Carolina. Contacts: Buzz Brewer, Sara McDonnell.
• Deblo Industries Ltd.standardChannel Partner/ Reseller/ DistributorSales representative covering Manitoba, Western Ontario up to Thunder Bay, Alberta and Saskatchewan in Canada.
• Elmco + AssociatesstandardChannel Partner/ Reseller/ DistributorSales representative covering Nevada (except Lincoln/Clark counties), Northern California (down to Monterey, Kings, Tulare, Inyo counties), and Hawaii.
• Mid-America Marketing Inc.standardChannel Partner/ Reseller/ DistributorMultiple office locations covering Alabama, Arkansas, Florida Panhandle, Mississippi, Tennessee, Western Kentucky, Illinois, Missouri, and Memphis area. Multiple contacts: Bill Pewitt (Nashville), Rance Norris (Birmingham), Terry/Lester/John (Memphis).
• Fischer Harris & Associates LLCstandardChannel Partner/ Reseller/ DistributorSales representative covering Illinois and Eastern Missouri. Contact: Jeff Fischer.
• MBA Distributing Inc./The Water AssociatesstandardChannel Partner/ Reseller/ DistributorSales representative covering Michigan (except Upper Michigan). Contact: Matt Hurst.
• King Sales NorthweststandardChannel Partner/ Reseller/ DistributorSales representative covering Alaska, British Columbia, Idaho, Oregon, Washington. Contact: Chris Cleary.
• KTH MarketingstandardChannel Partner/ Reseller/ DistributorSales representative covering Long Island, Northeast New Jersey (down to Passaic, Essex, Union, Middlesex counties), Southeast New York (up to Sullivan, Orange, Putnam counties). Contacts: Ken Harper, Russ Harper.
• L S SalesstandardChannel Partner/ Reseller/ DistributorSales representative covering Oklahoma. Contact: Kip Slack.
• Ten Point Sales & MarketingstandardChannel Partner/ Reseller/ DistributorSales representative covering Colorado, El Paso County Texas, New Mexico, Scottsbluff County Nebraska, Utah, Wyoming, Montana. Contacts: Dave, Peyton.
• UAG WaterstandardChannel Partner/ Reseller/ DistributorSales representative covering Kansas and Western Missouri (up to Schuyler, Adair, Macon, Randolph, Boone, Cole, Miller, Pulaski, Laclede, Wright, Douglas, Ozark counties). Contact: Jonathan Accardo.
• Granse/Trio SalesstandardChannel Partner/ Reseller/ DistributorSales representative covering Minnesota, North Dakota, South Dakota, Wisconsin, Iowa, Nebraska and Upper Peninsula of Michigan. Contacts: Jeff Olson, Kim Olson, Charlie Loth.
• Cisco Specialty Products, Inc.standardChannel Partner/ Reseller/ DistributorSales representative covering Arizona, Nevada (Lincoln and Clark counties only), Southern California (up to San Luis Obispo, Kern, San Bernardino counties). Contacts: Sherry, Jason.
• Spotswood, Cotton and Welsh, Inc.standardChannel Partner/ Reseller/ DistributorSales representative covering Georgia. Contacts: Donald, James, John.
• Utility SolutionsstandardChannel Partner/ Reseller/ DistributorSales representative covering Indiana, Ohio, West Virginia (Except Morgan, Berkley & Jefferson Counties), Kentucky (East of Marshall & Calloway Counties). Contact: Trent Hertzfeld.
• Plastic WaterlinesstandardChannel Partner/ Reseller/ DistributorSales representative covering Delaware, New Jersey (up to Passaic, Essex, Union, Middlesex counties), Pennsylvania. Contacts: Joni, Kasey.
• Cooper New England Sales, Inc.standardChannel Partner/ Reseller/ DistributorSales representative covering Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont, and New York (down to Delaware, Ulster, Dutchess counties). Contact: Scott.
• Gardner O'Connor Inc. NorthstandardChannel Partner/ Reseller/ DistributorSales representative covering District of Columbia, Maryland, Virginia, West Virginia (Morgan, Berkley, Jefferson Counties). Contacts: Andy, Hazel.
• Utility Solutions SupplystandardChannel Partner/ Reseller/ DistributorSales representative covering Louisiana. Contact: Mark LeBlanc.

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Royal Building Products: Broad building products manufacturer that includes PVC pipe, fittings, and related products within a wider portfolio. Larger incumbent competing with GPK in PVC fittings and pipe for construction and infrastructure.

Direct peers

• Genova Products: Manufacturer of PVC pipe, fittings, and specialty products for plumbing, DWV, and water applications. Direct competitor to GPK in PVC fittings, particularly in residential and light commercial markets.
• JM Eagle: One of the largest producers of PVC pipe in North America, with a broad fittings portfolio. While primarily pipe-focused, JM Eagle's PVC fittings and large-diameter offerings overlap directly with GPK's product range.
• Charlotte Pipe and Foundry: One of the largest US manufacturers of PVC pipe and fittings, including DWV, pressure, and chemical waste systems. Direct competitor to GPK in molded and fabricated PVC fittings sold through plumbing wholesalers and infrastructure distributors.
• Diamond Plastics Corporation: Manufacturer of PVC pipe products including water, sewer, and irrigation pipe, with associated fittings. Comparable to GPK as a PVC pipe/fitting manufacturer serving US municipal and infrastructure markets.
• NIBCO: US manufacturer of flow control products including PVC fittings, valves, and plumbing supplies. Directly comparable to GPK in PVC fittings for plumbing, water, and DWV applications.
• Spears Manufacturing: Major US manufacturer of PVC, CPVC, and PP piping products including fittings, valves, and accessories. Competes directly with GPK in molded PVC fittings for plumbing, irrigation, and industrial applications.
• Lasco Fittings: Specialty manufacturer of PVC and CPVC fittings, including DWV and pressure fittings. Comparable niche competitor to GPK with similar size and product focus on injection-molded PVC fittings.
• IPEX (Aliaxis): Large North American manufacturer of PVC, CPVC, and engineered plastic pipe, fittings, and valves for plumbing, industrial, and municipal markets. Directly competes with GPK in PVC fittings and pipe systems across US and Canada.
• Cresline Plastic Pipe and Fittings: US-based manufacturer of PVC and other plastic pipe and fittings for water, sewer, and drain applications. Directly comparable to GPK in core PVC fittings and pipe product offerings.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/GPK-Products-IncIndiana-Seal-Company-781297088692720
• LinkedInlinkedin.com/company/gpkproducts-indianaseal

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 GPK Products