Proco Products, Inc.

Proco Products, Inc.

Proco Products, Inc. is a global leader in the design and manufacturing of piping/ducting system expansion joints. We offer the most complete line of rubber and molded PFA expansion joints, fabric fan connectors, braided flexible hose assemblies and low torque sealing gaskets to the piping industry. Rubber Expansion Joints, Duckbill Check Valves, Wall Seals, Pipe Fittings, Hose/Rubber. Proco Products, Inc. operates worldwide through a broad agent and distribution network to provide our customers with a wide range of products and services.

Company details

2431 North Wigwam Drive , Stockton , CA 95205 USA
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Business Type:
Industry Type:
Pipes and Piping
Market Focus:
Globally (various continents)
Year Founded:
$10,000,000 US - $100,000,000 US


Proco Products, Inc. is the global leader in the design and supply of expansion joints for piping/ducting systems. For over 30 years, Proco has prided themselves on offering the most complete line of products to suit a variety of applications. Some of these products include rubber and molded PTFE expansion joints, braided flexible hose assemblies and low torque sealing gaskets.

Also available from Proco Products, Inc. are the Series 700 ProFlex™ rubber duckbill check valves.  These valves are commonly used in the water and sewage industry. Rubber check valves are a cost effective way to control back pressures from sewage treatment plants, outfalls and tidal operations. All Proco check valves are manufactured completely of barnacle resistant rubber with a top quality fungicide.

Proco is involved in several technical and trade organizations, such as the FSA (Fluid Sealing Association – Rubber Expansion Joint Division and Non-Metallic Ducting Expansion Joint Division). One of Proco’s own, Rob Coffee, VP of Sales & Marketing, is a part of the FSA Board of Directors and serves on technical committees to ensure its continued development of proper expansion joint design for industries served. Other associations that Proco is proud to be a member of are NAHAD (National Association of Hose and Accessory Distributors), WEF (Water Environment Federation), AWWA (American Water Works Association), IDCO (Industrial Distributor Co-op) and the Cooling Tower Institute.

Proco Products, Inc. operates worldwide through a global agent and distribution network providing a wide range of products and services. This allows them to service the customer during all phases of a project regardless of location. Proco’s main goal is to provide superior service to the demanding marketplace. Quality and service will always be Proco’s highest priority.

With more than $2 million in inventory, Proco maintains one of the largest stocks of product in North America. Contact Proco for pricing and availability on the appropriate expansion joint or check valve for a particular application.


Our manufacturing history of expansion joints dates back to the old Uniroyal Company, who invented the rubber expansion joint back in 1930.  When reflecting on that history, the first thing that comes to mind is our founders, Gene Johnson and Merv Vater. They were business partners, friends and firm believers that in business you have to “work harder and smarter than your competitors.”  Johnson and Vater met in 1972 while working in the expansion joint industry. Several years later Gene was working as a distributor of expansion joints for manufacturers, PROtective Coatings of Fort Wayne, IN. Protective Coatings manufactured rubber expansion joints for Uniroyal under a private label arrangement from 1965 to 1979. During Gene’s affiliation with Protective Coatings, Merv approached him with the idea to buy the company.  Together they made the purchase, changed the name, and thus Proco Products, Inc. was established.

Proco Products, Inc. (previously PROtective COatings of Fort Wayne, Indiana) began marketing rubber expansion joints under its shortened name, PROCO, in 1980. In 1984 Proco Products acquired all assets of Protective Coatings – including tooling, specifications and technologies used in producing rubber expansion joints – and remains the sole property of Proco Products, Inc. today. And since 1984, Proco has been a place that many loyal employees have been proud to call home.

Largest Inventory in North America
With over $2,000,000 of finished goods stocked in our warehouse, you can be sure that we have your requirement in stock. Hundreds of styles/compounds/sizes up to 72' ID

Longest Business Day
Don't worry about times zones, just call! Daily hours are 5:30am to 5:15 pm PST to serve your requirements.

Quick Shipments
In stock items can ship in 1-2 days after receipt of order.

Interchange Guide
Now you can indentify competitive products. If it's a rubber expansion joint, it's listed in the PROCO Interchange Guide. We can offer an equivalent for your application. Write for your copy or you can access the guide from our web site.

Bar-Coded Computerized Inventory
When you call us, we can immediately advise you if your requirement is in stock or the specific day it's expected to be added to our inventory.

Toll-Free Phone Number
Check 'price and delivery* by calling our toll-free phone number: USA/Canada (800) 344-3246   

24-Hour Fax
Speedy delivery of your drawings, quote requests and other communications. Dial (209) 943-0242 FREE   

No Switchboard - No Waiting
Our sales staff answers the phone - not operators or secretaries. We're ready to handle your requirement.

Trade Show support your sales activity
PROCO participates in a number of national shows annually, generating sales leads for you.

Emergency Service - Night, weekends, even holidays
When you have an emergency, simply dial 800-344-3246 - several personal numbers will be available from the recorder. We'll solve the problem!

24-Hour Phone Service
When we are closed, PROCO phones are monitored to accept your calls. Leave a message for priority service on the next working day.

Confirmed Quotations
We will confirm your request for 'price and delivery' with a formal quotation documenting the discussion. The quotation is then saved in our system, making future order entry easy.

Short Production Time
Means you will receive your order faster. Our standard delivery schedule for non-stock products is four to six weeks. If you're in a jam, we can ship your order out in two weeks for an expedited fee.

Emergency Production
Tell us when you need the expansion joint. We'll meet your schedule! Expediting service available.

Tracking UPS Shipments
Our computer is linked to UPS allowing immediate tracking of your shipment. We can tell you exactly where the order is and when you will receive it.

Preselected Truck Routing
On your first call, we can advise names of carriers we normally ship with to minimize 'interline transfer.' No more delayed, lost or 'best way' shipments.

Estimated Truck/UPS Rate
When you call, our computer can advise the estimated UPS or truck charge for your shipment. You will know your shipping costs in advance.

Product Submittal Drawings
Need a drawing? Drawings can be prepared same-day on most products. We'll assist you in preparing an impressive quotation for your customer.

Literature for the Engineer
Not just pretty pictures - the PROCO literature is jammed packed with charts, graphs and engineering data that answers questions and allows you to specify a product for your customers.

Day or night, we're ready to automatically receive your messages. Our address is

Choice of Elastomers
Standard sizes are stocked in Butyl, EPDM, CSM, Neoprene, Nitrile, Natural Rubber and PTFE. Other elastomers available upon request. More importantly, the PROCO Chemical/Rubber Compatibility Guide will assist you in elastomer selection. Write for your copy or you can access the guide from our web site.

Experienced Sales Staff
With over 20 years average expansion joint experience, our excellent staff can answer questions and solve problems for you.

Order Status Report
Call and give us your Purchase Order No. or our Sales Order No. - our computer can instantly provide the status of your order, when it will be completed, or when and how it was shipped.

Fully Tooled
The most complete set of tooling in industry means that seldom will you or your customer be requested to 'buy tooling.'

Complete Product Line
If it's rubber / metal / plastic - we have it. Spool-type joints to 120' ID - molded, spherical, wide-arch, reducers, pipe penetration seals, unions, etc. - are all available. PROCO is a 'one-call source' for your expansion joint requirements.

Standard 'All-Service' Products
Much of our inventory is devoted to Chlorobutyl/Polyester products meeting FSA Standrd Class I, II and Special Class II. One product to perform many of our many customers' requirements!

Daily UPS Pick-Ups
At all of our warehouses. Airbill number given when you call. Next-day, Second-day, etc. - we're used to making expedited shipments!

Association Memberships
As the Number One supplier of expansion joints in North America, we're members of the Fluid Sealing Association - REJ Division, NAHAD, AWWA, WEF and CTI - your assurance that we manufacture to association standards thus certifying a quality product.

Financially Secure
Some competitors have closed, sold, merged, or liquidated in recent years. PROCO will be here tomorrow. Check our D & B Rating: Duns #11-509-0326.

Expansion Joint Specialists
Our time and attention is not diverted by having to sell lagging, belting or packings. Our reputation is based on being the authority on expansion joints and check valves. We'll solve your problems.

Written Return Goods Policy
Buy too much, wrong size, wrong type? Send it back, freight paid. No restock charge on 'stock' merchandise returned with a replacement order. No replacement order requires a minimum 10% restocking charge. Non-stock or custom merchandise is not returnable.