SINCE 1953

A legacy of quality
sealing solutions

The innovators of underground stormwater & sanitary sewer pipe couplers for over 70 years. MarMac® Construction Products manufactures pipe joint couplings, seals, and wraps that stand the test of time.

CSP Coupler
CSP O-Ring Gasket
Grout Diaper

Products by
Industry

MarMac Construction Products Concrete Pipe

PRECAST & CONCRETE

MarMac Construction Products HDPE HDPP Pipe

HDPE/PP & PLASTIC

MarMac Construction Products CMP CSP Pipe

CSP & METAL

MarMac® Pipe Couplings

Built for the trenches.

With over seven decades of proven performance in the most demanding environments, MarMac® couplers are durable, reliable, and permanent sealing solutions for underground, gravity-flow drainage systems of all materials.

Superior Quality

MarMac and our employee family strive to manufacture the most quality, highly-effective products for our customers. Our products are designed to be the best and our quality assurance program ensures our shipped goods represent the best on the market.

Exceptional Customer Service

Since 1953, customer service has been a top priority for MarMac Construction Products. Our philosophy here is simple: The customer is always right. We stand behind our products, and work hard to ensure our customers have what they need, when they need it.

Unrivaled Dependability

Anyone who works in the construction industry knows how important dependability is. Customers rely on MarMac Construction Products to receive highly dependable, long-lasting parts on time so they have them when they're needed.

Unmatched Experience

MarMac Construction Products has been serving the industry for 7 decades. Our employee family is the most knowledgeable, honest, and experienced in the stormwater & sewer drainage industries and we're always ready to share our “know how” with you.

The right coupler
for the job.
Find the pipe coupling you need with our easy tool
Rolled Pipe Coupler - MarMac Construction Products

Superior Couplers & Sealing Products

For Underground Infrastructure

MarMac® is a Proud Member Of

Statement on Tariffs
Updated Tuesday, March 11th 2025

Our team at MarMac Construction Products has received multiple inquiries regarding the proposed tariffs from our international partners. We have been investigating whether our products will fall under any categories named in the current lists that have been announced. None of our products will be subject to tariffs to the best of our knowledge as of March 11, 2025. We are still evaluating changes regarding our raw material pricing.

As many are aware, this situation continues to change rapidly as far as product categories, tariff levels, and timeline. We will continue to monitor this situation and update our partners accordingly. Thank you for your continued business.