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.

The UNIVERSAL CMP DP Coupler is a four-compression band, heavy duty (3-ply, 180 mil thickness) coupler designed to join CMP/CSP (both rerolled and non-rerolled/plain/cut end) to any other type of pipe in that nominal size with an OD up to that of corrugated HDPE/HDPP and down to that of SCH40 PVC.

NOTE: For CMP-to-CMP connections go to MarMac CMP Pipe Couplers (soil-tight and water-tight versions available).

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"
• Connection: CMP to HDPE/HDPP/PVC (Size on Size)
• 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

***SPECIAL ORDER*** 

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

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.

The UNIVERSAL DP Coupler is a four-compression band, heavy-duty (3-ply, 180 mil thickness) coupler designed to join two, size for size pipes with ODs up to that of “B” wall RCP (no bell) and down to that of SCH40 PVC, and practically every other type of pipe in that nominal size, with the exception of CMP/CSP.  FOR CMP See MM-DPUNIV-24CMP

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"
• Max OD Large End - 30" "B" Wall RCP
• Min OD Small End - 24"
• 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" x 38" ID  37" 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: 30" ID  37" 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

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: 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

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

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: 27" x 42" ID  40.5" 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: 33" ID  40.5 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: 29" x 45" ID  44" 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: 36" ID  44" 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

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: 30"
• 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***

e

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: 30"
• 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"