MarMac Dissimilar Pipe Couplers (DP Couplers) are engineered to join, seal, and restrain the connections between pipes of differing material and/or pipes of varying nominal size*. These unique, external sealing bands are reinforced and prevent infiltration into gravity-flow drainage systems.

*While dependent upon pipe material(s) and/or overall pipe diameter(s), the difference in diameter must not exceed 15% or 8″ to allow for proper step-down.

DP Couplers integrate several unique components into a single, customizable, full-perimeter, external sealing band. Our specially-formulated, rubberized mastic aggressively adheres to all known pipe surfaces, providing a positive seal to battle infiltration. The coupling is reinforced with a sheet of durable, woven polypropylene which provides shear and puncture resistance. They are constructed with four integrated compression bands, which when tightened, form a mechanical seal, permanently bonding the mastic to the pipe wall.

• Size: 21"

Some of our most popular pipe jointing scenarios are below. This is by no means a comprehensive list or a suggestion that these connections perform better than others. Dissimilar Pipe Couplers are able to connect virtually any structurally sound pipe material with another. DP Couplings are also a great choice for two pipes of the same material, but with differing nominal diameter. The aforementioned diameters however, must be reasonably close to account for proper step-down/reduction.

1. RCP to HDPE/HDPP
2. CMP to HDPE/HDPP (Must note if CMP has annular / re-rolled or spiral  /non-rerolled ends)
3. CMP to RCP  (Must note if CMP has annular / re-rolled or spiral / non-rerolled ends)
4. PVC to HDPE/HDPP

***SPECIAL ORDER*** 

***Non-cancellable and non-returnable***

• Strong, permanent, shear & puncture resistant
• Easily installed & immediately inspectable
• Tens of thousands in use today with nearly a 100% success rate
• Full-perimeter, positive seal = infiltration-proof
• Specially formulated mastic layer
• Heavy-duty, high quality construction

MarMac MacWrap is a highly-advanced, external joint coupler designed to permanently prevent infiltration at precast concrete structure connections, including reinforced concrete pipe (RCP), manhole sections, box culverts & stormwater retention systems, and many other round or elliptical concrete structures.

• Size: 21" ID  26.5" OD  
• Strong, permanent, shear & puncture resistant
• Specially-formulated mastic layer
• Easily installed & immediately inspectable
• Full-perimeter, positive seal = infiltration-proof
• Heavy-duty, high-quality design
• Protection from corrosion, acids & alkali by using a MacWrap CR (Chemical Resistant)

***SPECIAL ORDER*** 

***Non-cancellable and non-returnable***

Available in sizes 12" - 144" Round & Elliptical 

Other MacWrap versions available:

• MacWrap for Manholes
• MacWrap for Box Culverts
• MacWrap Chem-Resistant
• MacWrap Repair Coupler

MACWRAP REPAIR COUPLER

MacWrap Repair Coupler is an advanced, external joint coupler, specifically designed to repair compromised joints of precast structures while simultaneously preventing infiltration. MacWrap Repair couplings can be used for the rehabilitation of tongue & groove and bell & spigot reinforced concrete pipe as well as manhole sections, restoring the integrity of damaged joints.

With its membrane comprised of the same materials as a standard MacWrap, the width of MacWrap Repair Couplers is increased to 24”, four compression bands are utilized versus the standard two, and the thickness is increased by approximately 50%. This is a heavy-duty, 3-ply coupler as the membrane contains an additional layer of polyethylene and mastic.

External seals for reinforced concrete pipe joints

• Size: 21" ID  26.5" OD  
• Strong, permanent, shear & puncture resistant
• Specially-formulated mastic layer
• Easily installed & immediately inspectable
• Full-perimeter, positive seal = infiltration-proof
• Heavy-duty, high-quality design
• Protection from corrosion, acids & alkali by using a MacWrap CR (Chemical Resistant)

***SPECIAL ORDER*** 

***Non-cancellable and non-returnable***

Available in sizes 12" - 144" Round & Elliptical 

Other MacWrap versions available:

• MacWrap for Manholes
• MacWrap for Box Culverts
• MacWrap Chem-Resistant
• MacWrap RCP Coupler

MarMac MacWrap is a highly-advanced, external joint coupler designed to permanently prevent infiltration at precast concrete structure connections, including reinforced concrete pipe (RCP), manhole sections, box culverts & stormwater retention systems, and many other round or elliptical concrete structures.

• Size: 22" x 34" ID  33.5" OD  
• Strong, permanent, shear & puncture resistant
• Specially-formulated mastic layer
• Easily installed & immediately inspectable
• Full-perimeter, positive seal = infiltration-proof
• Heavy-duty, high-quality design
• Protection from corrosion, acids & alkali by using a MacWrap CR (Chemical Resistant)

***SPECIAL ORDER*** 

***Non-cancellable and non-returnable***

Available in sizes 12" - 144" Round & Elliptical 

Other MacWrap versions available:

• MacWrap for Manholes
• MacWrap for Box Culverts
• MacWrap Chem-Resistant
• MacWrap Repair Coupler

MACWRAP REPAIR COUPLER

MacWrap Repair Coupler is an advanced, external joint coupler, specifically designed to repair compromised joints of precast structures while simultaneously preventing infiltration. MacWrap Repair couplings can be used for the rehabilitation of tongue & groove and bell & spigot reinforced concrete pipe as well as manhole sections, restoring the integrity of damaged joints.

With its membrane comprised of the same materials as a standard MacWrap, the width of MacWrap Repair Couplers is increased to 24”, four compression bands are utilized versus the standard two, and the thickness is increased by approximately 50%. This is a heavy-duty, 3-ply coupler as the membrane contains an additional layer of polyethylene and mastic.

External seals for reinforced concrete pipe joints

• Size: 27" ID  33.5" OD  
• Strong, permanent, shear & puncture resistant
• Specially-formulated mastic layer
• Easily installed & immediately inspectable
• Full-perimeter, positive seal = infiltration-proof
• Heavy-duty, high-quality design
• Protection from corrosion, acids & alkali by using a MacWrap CR (Chemical Resistant)

***SPECIAL ORDER*** 

***Non-cancellable and non-returnable***

Available in sizes 12" - 144" Round & Elliptical 

Other MacWrap versions available:

• MacWrap for Manholes
• MacWrap for Box Culverts
• MacWrap Chem-Resistant
• MacWrap Repair Coupler

MarMacʼs CMP Coupler is a single unit, external sealing band designed to prevent infiltration into corrugated steel pipe drainage systems. The coupling creates a strong, permanent, flexible seal around the joints of rerolled (annularized) or non-rerolled (spiral) CSP pipe ends.

CMP couplers function on traditional galvanized and polymer coated pipe. They are easy to install, cost-efficient, permanent, and readily available. Our dedicated production line and unique manufacturing process allow for quick shipping regardless of coupler size or order quantity.

MarMac CMP Coupler membranes are constructed of cross-laminated layers of rubberized mastic, integrated mechanical compression bands, an internal woven reinforcement, and butyl underlays.

Our proprietary mastic aggressively adheres to the pipe surface, while the integrated compressions bands mechanically seal and form a permanent bond to the full circumference of the pipe walls. The internal woven polypropylene material provides increased shear and puncture resistance. The butyl rubber underlays compress beneath the compression bands and against the pipe wall and joint, forming an infiltration-proof seal on annular, spiral or helical corrugations.

Available in all sizes to connect virtually any diameter of corrugated metal pipe, Soil-Tight CMP Couplers seal both rerolled and non-rerolled pipe ends. They are designed with four evenly-spaced, high-tensile compression bands, each reinforced with butyl rubber underlays. When the bands are tightened, the compressed butyl creates an infiltration-proof, exfiltration-resistant joint.

• Size: 24"
• Works on the following connections:
• Rerolled (Annular)  to Non-rerolled (Spiral) ends
• Rerolled (Annular)  to Rerolled (Annular) ends
• Non-rerolled (Spiral) to Non-rerolled (Spiral) ends
• Easy to install, permanent & versatile
• Works on rerolled or non-rerolled ends
• Galvanized or polymer-coated CSP
• Infiltration-proof
• Strong, shear & puncture-resistant
• Cost-efficient & readily available

***SPECIAL ORDER*** 

***Non-cancellable and non-returnable***

Available in sizes 6" - 144" 

MarMacʼs CMP Coupler is a single unit, external sealing band designed to prevent infiltration into corrugated steel pipe drainage systems. The coupling creates a strong, permanent, flexible seal around the joints of rerolled (annularized) or non-rerolled (spiral) CSP pipe ends.

CMP couplers function on traditional galvanized and polymer coated pipe. They are easy to install, cost-efficient, permanent, and readily available. Our dedicated production line and unique manufacturing process allow for quick shipping regardless of coupler size or order quantity.

MarMac CMP Coupler membranes are constructed of cross-laminated layers of rubberized mastic, integrated mechanical compression bands, an internal woven reinforcement, and butyl underlays.

Our proprietary mastic aggressively adheres to the pipe surface, while the integrated compressions bands mechanically seal and form a permanent bond to the full circumference of the pipe walls. The internal woven polypropylene material provides increased shear and puncture resistance. The butyl rubber underlays compress beneath the compression bands and against the pipe wall and joint, forming an infiltration-proof seal on annular, spiral or helical corrugations.

Designed as an infiltration and exfiltration-proof sealing solution, our Watertight CSP Coupler connects 12- 54” diameter corrugated steel pipe with both rerolled and non-rerolled ends. Utilizing five high-tensile compression bands, the center and outer edge bands are reinforced with butyl rubber underlays, which create an exfiltration-proof seal when tightened. Two secondary compression bands straddle either side of the main center strap as a preventative measure.          

• Size: 24"
• Works on the following connections:
• Rerolled (Annular)  to Rerolled (Annular) ends
• Non-rerolled (Spiral) to Non-rerolled (Spiral) ends
• Watertight will not work on Rerolled (Annular)  to Non-rerolled (Spiral)
• Easy to install, permanent & versatile
• Galvanized or polymer-coated CSP
• Infiltration-proof
• Exfiltration-Proof
• Strong, shear & puncture-resistant
• Cost-efficient & readily available

***SPECIAL ORDER*** 

***Non-cancellable and non-returnable***

Available in sizes 12" - 54" 

MarMac PolySeal is a flexible, high-strength pipe coupling that permanently seals and restrains corrugated plastic pipe. PolySeal Couplers are over-engineered, reinforced external joint seals designed to connect HDPE / HDPP corrugated pipe, while remaining both infiltration proof and exfiltration resistant. PolySeal Couplings are perfect for cut & butt joints, field repairs, new detention systems, and more. 

MarMac’s Double-Wide PolySeal Couplings are heavy-duty 3-ply as they are manufactured with an additional layer of polyethylene and mastic. Nearly twice the width of a standard PolySeal, our Double-Wide PolySeal Coupler comes with five integrated compression bands, as opposed to three with our Standard coupler.

Our Double-Wide PolySeal coupler has five integrated compression bands. Sizes under 30″ are standard-duty and use hose clamp bands made of high-strength 409 or 304 stainless steel. Heavy-duty sizes over 30″ contain an additional membrane layer of polyethylene and mastic, and utilize built-in ratchet straps.

Common uses include repairs, such as instances where pipe ends have minor damage or to cover small punctures in a pipe caused by fork trucks or similar. Additionally, Double-Wide PolySeal can be used in place of standard PolySeal to make a stronger, stiffer joint.

MarMac Dissimilar Pipe Couplers (DP Couplers) are engineered to join, seal, and restrain the connections between pipes of differing material and/or pipes of varying nominal size*. These unique, external sealing bands are reinforced and prevent infiltration into gravity-flow drainage systems.

*While dependent upon pipe material(s) and/or overall pipe diameter(s), the difference in diameter must not exceed 15% or 8″ to allow for proper step-down.

DP Couplers integrate several unique components into a single, customizable, full-perimeter, external sealing band. Our specially-formulated, rubberized mastic aggressively adheres to all known pipe surfaces, providing a positive seal to battle infiltration. The coupling is reinforced with a sheet of durable, woven polypropylene which provides shear and puncture resistance. They are constructed with four integrated compression bands, which when tightened, form a mechanical seal, permanently bonding the mastic to the pipe wall.

• Size: 24"

Some of our most popular pipe jointing scenarios are below. This is by no means a comprehensive list or a suggestion that these connections perform better than others. Dissimilar Pipe Couplers are able to connect virtually any structurally sound pipe material with another. DP Couplings are also a great choice for two pipes of the same material, but with differing nominal diameter. The aforementioned diameters however, must be reasonably close to account for proper step-down/reduction.

1. RCP to HDPE/HDPP
2. CMP to HDPE/HDPP (Must note if CMP has annular / re-rolled or spiral  /non-rerolled ends)
3. CMP to RCP  (Must note if CMP has annular / re-rolled or spiral / non-rerolled ends)
4. PVC to HDPE/HDPP

***SPECIAL ORDER*** 

***Non-cancellable and non-returnable***

• Strong, permanent, shear & puncture resistant
• Easily installed & immediately inspectable
• Tens of thousands in use today with nearly a 100% success rate
• Full-perimeter, positive seal = infiltration-proof
• Specially formulated mastic layer
• Heavy-duty, high quality construction

MarMac MacWrap is a highly-advanced, external joint coupler designed to permanently prevent infiltration at precast concrete structure connections, including reinforced concrete pipe (RCP), manhole sections, box culverts & stormwater retention systems, and many other round or elliptical concrete structures.

• Size: 24" ID  30" OD  
• Strong, permanent, shear & puncture resistant
• Specially-formulated mastic layer
• Easily installed & immediately inspectable
• Full-perimeter, positive seal = infiltration-proof
• Heavy-duty, high-quality design
• Protection from corrosion, acids & alkali by using a MacWrap CR (Chemical Resistant)

***SPECIAL ORDER*** 

***Non-cancellable and non-returnable***

Available in sizes 12" - 144" Round & Elliptical 

Other MacWrap versions available:

• MacWrap for Manholes
• MacWrap for Box Culverts
• MacWrap Chem-Resistant
• MacWrap Repair Coupler

MACWRAP REPAIR COUPLER

MacWrap Repair Coupler is an advanced, external joint coupler, specifically designed to repair compromised joints of precast structures while simultaneously preventing infiltration. MacWrap Repair couplings can be used for the rehabilitation of tongue & groove and bell & spigot reinforced concrete pipe as well as manhole sections, restoring the integrity of damaged joints.

With its membrane comprised of the same materials as a standard MacWrap, the width of MacWrap Repair Couplers is increased to 24”, four compression bands are utilized versus the standard two, and the thickness is increased by approximately 50%. This is a heavy-duty, 3-ply coupler as the membrane contains an additional layer of polyethylene and mastic.

External seals for reinforced concrete pipe joints

• Size: 24" ID  30" OD  
• Strong, permanent, shear & puncture resistant
• Specially-formulated mastic layer
• Easily installed & immediately inspectable
• Full-perimeter, positive seal = infiltration-proof
• Heavy-duty, high-quality design
• Protection from corrosion, acids & alkali by using a MacWrap CR (Chemical Resistant)

***SPECIAL ORDER*** 

***Non-cancellable and non-returnable***

Available in sizes 12" - 144" Round & Elliptical 

Other MacWrap versions available:

• MacWrap for Manholes
• MacWrap for Box Culverts
• MacWrap Chem-Resistant
• MacWrap RCP Coupler

MarMac PolySeal is a flexible, high-strength pipe coupling that permanently seals and restrains corrugated plastic pipe. PolySeal Couplers are over-engineered, reinforced external joint seals designed to connect HDPE / HDPP corrugated pipe, while remaining both infiltration proof and exfiltration resistant. PolySeal Couplings are perfect for cut & butt joints, field repairs, new detention systems, and more. 

MarMac’s Standard PolySeal is a high performance, external joint coupler designed for the prevention of infiltration and resistance of exfiltration at joints of common HDPE & HDPP corrugated pipe.

Our standard PolySeal coupler has three integrated compression bands. Sizes under 30″ are standard-duty and use hose clamp bands made of high-strength 409 or 304 stainless steel. Heavy-duty sizes over 30″ contain an additional membrane layer of polyethylene and mastic, and utilize built-in ratchet straps.