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-18CMP

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: 18"
• Max OD Large End - 23" "B" Wall RCP
• Min OD Small End - 18"
• 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 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

Doublewall pipe is a corrugated polyethylene pipe with a smooth interior. This combination provides a lightweight, durable product for sports fields, storm sewers, culverts, and many other applications where high strength and maximum flow are essential.

• Conforms to AASHTO M-294 and ASTM F667 specifications
• Joint System: Bell & Spigot (GASKET NOT INCLUDED)
• Length: 20'

Doublewall pipe is a corrugated polyethylene pipe with a smooth interior. This combination provides a lightweight, durable product for storm sewers, culverts, and many other applications where high strength and maximum flow are essential.

• Conforms to AASHTO M-294 and ASTM F667 specifications
• Joint System: Bell & Spigot
• Gasket: Meets or exceeds ASTM F477
• Length: 20' or 9.7'
• Available: Watertight Joint (Special Order)

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 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.

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

Doublewall pipe is a corrugated polyethylene pipe with a smooth interior. This combination provides a lightweight, durable product for sports fields, storm sewers, culverts, and many other applications where high strength and maximum flow are essential.

• Conforms to AASHTO M-294 specifications
• Joint System: Bell & Spigot (GASKET NOT INCLUDED)
• Length: 20'

Doublewall pipe is a corrugated polyethylene pipe with a smooth interior. This combination provides a lightweight, durable product for storm sewers, culverts, and many other applications where high strength and maximum flow are essential.

• Conforms to AASHTO M-294 specifications
• Joint System: Bell & Spigot
• Gasket: Meets or exceeds ASTM F477
• Length: 20' or 13.5'
• Available: Watertight Joint (Special Order)

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.