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TOPAZ pipeline for sewage

For sewage discharge from sall diameter pipes

The TOPAZ ductile iron pipeline system is dedicated to sewage discharge for small diameters of DN/OD 75 to 160 mm and is suitable ofr most soils.

Sewage ductile iron pipes

The range comprises six metre pipes along with many fittings and accessories.


Coating of sewage pipe topaz

  • Protection: resulting from research by Saint-Gobain PAM, BioZinalium ensures the perfect external protection for TOPAZ pipes. Composed of 85-15 zinc-aluminium alloy enriched with copper and covered by a protective layer Aquacoat. BioZinalium reduces the risk of localised biocorrosion. TOPAZ fittings are protected internally and externally with a red epoxy coating applied by powdering with a minimum thickness of 250 µm.
coating without BPA
zinc aluminium external coating of ductile iron pipe
Composition of the external coating of TOPAZ pipe

BioZinalium® is a material environment-friendly due to the absence of VOCs and BPA.

  • Resistance: DUCTAN, a completely smooth internal lining provides TOPAZ pipes with a strong resistance to the harshest acid and alkaline effluents over a pH range from one to 10. The plasticity of DUCTAN ensures good impact and abrasion resistance.


  • Simple installation and adaptability: designed to be handled and installed by hand, TOPAZ products are easy to fit and can adapt to ground movements.


  • Economic laying: the design of TOPAZ pipes enables eco-laying with the reuse of natural backfill and thus creates considerable cost savings in relation to the purchase and transport of raw materials.


Internal coating, sewage pipe
Longitudinal section of TOPAZ pipe

TOPAZ fittings

The fittings of the range TOPAZ are protected internally and externally with a red epoxy coating applied by powdering with a minimum thickness of 250 µm.

sewage ductile iron taper
ductile iron bend topaz
sewage ductile iron collar topaz
sewage ductile iron all socket tee
All socket Tee

High performance elastomer NBR

TOPAZ NBR joints have been tested in accordance to Standard EN 598, under extreme conditions of angular deflection and dimensional tolerance.

TOPAZ NBR quality joints have been adapted to resist to the effluents found in mains drainage. This quality meets the requirements of European Standard EN 681-1 type WG.

Declined in 3 models, joints that fit the TOPAZ system allows multiple connections:

joint for topaz

Single version joint for TOPAZ cast iron pipes and fittings

vi locked joint topaz pipe

Vi locked version joint for TOPAZ cast iron pipes and fittings only

vip locked joint pipes pvc - ductile iron

ViP locked version joint for plastic, PVC-U, PVC-BO and PE tubes connected to TOPAZ cast iron fittings

The TOPAZ joints ensure a perfect watertightnrdd, even inthe most demanding case.

Tools to accompany and facilitate installation

The products are designed to be handled and installed by hand. They are easy to fit and adapted to ground movements. Saint-Goabin PAM proposes a range of tools to assist companies during the laying of TOPAZ.


cutting and chamfering machine for pipes

BluCut is a cutting and chamfering machine which permits clean, fast, secured and autoguided cut and chamfer on TOPAZ pipes


device for the laying of pipe
BluTrak is a device for the maying of unlocked TOPAZ pipe. It permits a high installation rate                                                              

Economic laying

The design of the TOPAZ pipes enables ECO-LAYING with reuse natural backfill. This leads to considerable cost savings regarding purchase and transport of raw materials      

e-Catalog - TOPAZ


sewage small diameter pipe worksite
Pipes TOPAZ stored on site
ductile iron pipe, easy laying
Sewage ductile iron pipe TOPAZ, easy to fit and lay
socket pipe, anchored pipe
Sockets of ductile iron pipes TOPAZ with NBR joints
small diameter ductile iron pipe, DN 75 90 110 125 140 160
Small diameter sewage ductile iron pipes TOPAZ DN/OD: 75, 90, 110, 125,140, 160


TOPAZ: Latest SEWAGE innovation by Saint-Gobain PA
Discover TOPAZ: latest SEWAGE innovation by Saint-Gobain PAM
Cutting and chamfering SEWAGE ductile iron pipe with BluCut machine
This video offers a tutorial for using the BluCut machine that can cut and chamfer your cast iron pipes TOPAZ and BLUTOP.
How to repair a cutting on a TOPAZ ductile iron pipe ?
Learn how to repair a cut on a pipe TOPAZ, the new pipe system in ductile iron dedicated to sewage networks.

See also

Pipes and fittings for sewerage systems