Accessories for GRP, HDPE and steel-cylinder reinforced concrete pipes

Joining systems with “Full-Face” couplings

Accessory	Description
Standard coupling with elastomer gasket	Ideal for gravity networks. Quick to install, very good watertightness.
Repair coupling / sliding coupling	Allows a section to be repaired without cutting long lengths. Very useful for network maintenance.
Transition coupling	To connect GRP and concrete, GRP and HDPE, GRP and steel. Widely used in renovation or network extension.
Factory-crimped joint (centrifugally cast GRP)	Joint at the socket, crimped directly in the factory, which guarantees reliable and constant watertightness: the joint is positioned precisely, which removes the risk of errors during installation.

GRP pipes and fittings are made to the standard dimensions of the range; an intermediate diameter is available made to measure.

GRP manholes

GRP manholes are designed to provide a complete, durable and fully watertight solution for gravity networks: wastewater, stormwater, sewerage, drainage and industrial applications. Made of high-performance composite materials, they advantageously replace traditional concrete manholes thanks to their light weight, strength, watertightness and design flexibility. First range of manholes certified EN 15383.

• Non-corrosive material, ideal in aggressive environments (H₂S, variable pH)
• No risk of infiltration or exfiltration, closed monolithic base possible
• No curing time, no formwork, no mandatory concrete pouring
• Multiple geometries, angles, diameters and heights
• Perfect integration with GRP pipes: connection by an EPDM coupling identical to the one used on the pipes

Accessory	Description
Standard manhole	Prefabricated base with integrated inlet and outlet pipes. Configurable diameters and invert levels. Height adjustable with a GRP coupling and riser. Inlet and outlet angles made to measure. Closed or open base depending on site requirements.
Tangential manhole	Ideal solution for large-diameter collectors (DN > 800), with the possibility of adapting to smaller diameters. Shaft generally designed off-centre. Variable configuration depending on the diameter ratio between the collector and the manhole. Available in direct tangential version (without benching) or tangential with benching.
Manhole at change of direction	An alternative to the tangential manhole, positioned directly at the point where the pipeline changes direction. The shaft can rise on the outside or the inside of the bend, depending on the desired configuration. The number of segments follows the standard configuration of GRP bends; the length of the cut sections is adjusted to the shaft diameter.
Centred manhole	Centred shaft, designed as a standard tee element. Ideal when maintenance and cleaning operations can be carried out from ground level, without entering the pipe. A simple, direct solution suited to networks where internal access is not necessarily required.

GRP manhole options and accessories

Accessory	Description
Closed manhole base	Closed manhole base with GRP lining. Closed monolithic base possible.
Anti-flotation base plate	Base extended beyond the manhole diameter, in GRP, to ballast the manhole with the weight of the soil. Ballasting possible for installation in a high water table.
Ladder	Stainless steel 304, stainless steel 316 or GRP ladder. Watertight ladder bolts with GRP lining.
Benching	Preformed GRP benching on a standard manhole.
Lifting rings	For handling: use all lifting points to spread the loads.
Connection to other pipe materials	For example, a PVC pipe laminated onto the GRP manhole.

Manholes suitable for gravity systems (pressure class PN 1; they can operate under pressure). Default stiffness class: SN 10,000 or SN 20,000 N/m², other classes on request. Continuous service temperature from -40 °C to +35 °C. Manufactured by filament winding, centrifugal casting or helical winding. For industrial wastewater, the chemicals and their concentrations must be provided so that the suitable product can be chosen.

For more information, download the brochure.

Electrofusion fittings

Accessory	Description
Electrofusion coupling	Used to join two pipes in line. This is the most common fitting.
Electrofusion bend (45° / 90°)	Allows a change of direction while keeping a reliable weld.
Electrofusion tee	Used to create a branch or connect a secondary branch.
Electrofusion reducer	Allows a change from one diameter to another while keeping a welded joint.
Electrofusion saddle (or tapping saddle)	Ideal for creating a branch on an existing pipe without cutting it completely.
Electrofusion end cap	Used to close the end of a network durably.

Each fitting includes a heating coil: a low voltage (about 45 V) fuses the PE of the pipe and the fitting together, for lasting watertightness. HDPE pipes can also be joined by butt welding or mechanical fittings.

For more information, download the brochure.

Accessories for double-wall corrugated pipes

Accessory	Description
Joining couplings	External HDPE coupling, with or without gasket, suited to stiffness classes SN4, SN8 and SN16. Joins two pipes end to end.
EPDM sealing gaskets	Specific profile for the corrugated groove. Ensure gravity watertightness and withstand stormwater and wastewater.
Double-wall bends	15°, 30°, 45° and 90°. Same structure and stiffness as the pipes, for changes of direction in buried networks.
Tees and Y-pieces	90° tees and 45° Y-pieces, for stormwater or gravity sewerage connections.
Reducers	To go from a larger diameter to a smaller one. Double-wall, compatible with standard couplings.
Branch fittings	Allow a lateral branch to be created on a collector, by push-fit with an EPDM gasket. Compatible with gravity networks and retention basins.
Manholes and inspection chambers	Compatible inspection manholes, corrugated or smooth connections depending on the model, flat or sloped base.
End caps / plugs	To close an end. Used in basins, standby networks and watertightness tests.
Special parts	Some parts (inlets, outlets, shut-off plates, manifolds) can be welded in the workshop to suit the retention basin configuration.

On site, lengths of double-wall corrugated pipe are joined by an external coupling with an EPDM gasket, without welding. A complete range of accessories makes it possible to build any network configuration.

For more information, download the brochure.

Parts accompanying the shells

Accessory	Description
Access manholes	Manhole designed and made to measure to fit all sizes and shapes of manholes, with an exact match to the existing structure. The upper transition section can be eccentric or concentric, conical or any other shape. It can also be made in several panel sections to ease handling, transport and installation.

For more information, download the brochure.

Connection parts

Closing and inspection parts

Custom parts

Types of pipe joint

For more information, download the brochure.