Build complete, reliable systems – not just pipelines. DM Plastics and Steel supplies a full suite of compression, electrofusion, spigot, moulded and fabricated fittings, plus valves and backing rings for PE pipe. Manufactured to meet AS/NZS:4129 standards, each fitting is precision made to create a seamless system that performs together. We keep selection simple with product descriptions and practical advice, and we back it with our “Producing Solutions” approach for non-standard requirements.
Rural compression fittings, Metric compression fittings.
Welded, leaf-free EF couplers, saddles, and flange adaptors for critical pressure mains.
PE backing rings, stub flanges and complete flange kits for reliable, well-aligned bolted connections.
Long & short machined spigot fittings for precise, repeatable butt-fusion joints.
Secure, compatible threaded interfaces for meter sets, valves and service connections.
Our complete range of compression, electrofusion, spigot, fabricated, backing ring and valve fittings provides engineered, fit-for-purpose solutions across multiple sectors. DM Plastics & Steel combines quality components, local manufacture and a producing-solutions approach – partnering with clients to specify, fabricate and deliver the right assemblies for every project.
Mining water systems demand robustness and leak-free performance. We supply electrofusion and spigot fittings with backing rings for permanent mains and firewater, and fabricated manifolds and valve assemblies for process water, dewatering and dust suppression networks.
From potable and recycled water to sewer and fire mains, our metric fittings with clear BSP transitions ensure compliant, reliable networks. Electrofusion and spigot solutions provide welded integrity on trunk mains, while compression fittings and pre-fabricated service assemblies keep construction programs moving and reduce on-site labour.
We support service connections, meter sets and reticulation with precision compression fittings and BSP transition pieces. Where operators require welded joints for distribution integrity, our electrofusion options and fabricated valve modules meet gas and high-pressure water specifications.
Multi-utility corridors require coordinated, turn-key delivery. DM Plastics & Steel supplies pressure pipe fittings and valves to integrate water, recycled water or fire lines alongside conduit – compression fittings for rapid installation and EF/spigot solutions where spec-driven welded joints are required.
Use compression for smaller diameters and rapid installation, especially on services and repairs. Use electrofusion or spigot/moulded fittings where you want a fully welded main, higher integrity on pressured lines, or where specification requires fusion welding.
Metric fittings suit OD-sized PE; Rural fittings suit ID-sized rural pipe. On rural pipe sizes above 50mm, geometry can cross over — the catalogue shows when a metric fitting is used on a rural line. We’ll confirm at time of order.
Yes – we supply BSP ball valves (FxF) and a broad range of BSP male/female adaptors, tees and elbows.
Yes – our Automatic Air Release Valves are designed to purge air at high points to prevent air-lock and headloss. Saddle kits make installation easy.
DMP&S can supply EF fittings from DN25 to DN630. Size availability is subject to the style of fitting. Please speak with our team about your requirements.
Always keep fittings in the plastic bag and out of the direct sunlight. Couplers should be stored on their flat ends.
Operators installing electrofusion fittings on PE pipelines must be trained and qualified in PE welding by an accredited training organisation. A list of approved PE welding trainers is available from the Plastic Industry Pipe Association (PIPA)’s website
The welding process involves two stages – heating (fusion) and cooling. Cool down times are listed on the fitting barcode and fittings. The fitting should remain clamped during the cooling time.
Clamping the fittings during the EF joining process is important as it prevents the pipe and fittings from moving during the welding & cooling process. It also keeps the fittings aligned with the pipe, preventing the weight of the pipe from applying lateral pressure to the join.
Peeling & cleaning pipe before an EF weld is critical to ensure a permanent, leak-proof, successful joint. Peeling removes the outside layer of oxidised PE material before welding. Oxidised material is on the outside of all PE pipes and is the result of the manufacturing process. Unless this layer is removed, the oxidised material will inhibit the EF welding process, resulting in a failed weld. Cleaning after peeling ensures all contaminants, dust, grease and moisture are removed from the pipe surface prior to welding.
A maximum of 0.2mm for pipes up to DN25, 0.2mm to 0.3mm for pipes up to DN75 and 0.2mm to 0.4mm for pipes larger than DN75. These numbers may change over time, refer to PIPA for the most current industry guidelines.
Always used approved Isopropyl Alcohol EF welding wipes to clean the pipe before welding. Other substances such as metho, acetone, rags, cloths, sandpaper and wire brushes contain contaminants that inhibit the welding process. Contamination will result in weld failure. Always allow the surface to dry after cleaning with Isopropyl alcohol wipes.
DMP&S can supply compression fittings from DN16 to DN110. Size availability is subject to the style of fitting. Please speak with our team about your requirements.
Our compression fittings are rated to PN16 (1600kPa) at 20°C.
Yes, our fittings comply with AS/NZS:4129 standard for polyethylene (PE) pipes and fittings. Our fittings are also WaterMark certified & approved.
No – Compression fittings join PE pipes securely without the need for glue, soldering or specialised tools. They use a threaded nut and a ferrule placed over the pipe. As you tighten the nut, it compresses the ferrule against the pipe, creating a watertight, friction-based seal.
A common rule of thumb is to tighten the nut by hand until it is snug on the pipe and then use an adjustable wrench or spanner to give it another quarter to half turn. Be careful to not overtighten the fitting as this can crush the ferrule, deform or crack the pipe and damage the fittings threads.
Primary materials are PE/high‑density polyethylene and engineered polymer composites. Fasteners and reinforcement can be supplied in galvanised steel or stainless steel on request.
We supply rings and flange kits matched to common DN sizes and standard bolt patterns; custom diameters and drillings are available. Assemblies are suitable for typical PN10–PN16 systems (verify per assembly and valve rating).
Yes – we can supply full kits including backing ring, gasket, bolts, nuts and washers (galvanised or stainless options) for turnkey installation.
Split rings are two‑piece designs that allow retrofit installation around existing pipe without dismantling the line. They’re ideal for on‑site repairs, upgrades and restricted access situations.
Yes – flange adaptors and transition assemblies are drilled to BSP/ANSI (or other specified) patterns to interface PE pipe with metal valves and standard flanged hardware. Custom drilling patterns can be produced to match project requirements.
We supply long and short spigots across common DN sizes to match PE pipe and SDRs. Exact size and length availability depends on fitting style—contact sales for current stock and customised lengths.
All spigots are manufactured from PE100/high‑density polyethylene to ensure fusion compatibility and consistent material properties with PE100 pipe.
Spigots are suitable for typical PN10–PN16 systems; final pressure suitability depends on pipe SDR, wall thickness and the specific spigot design—confirm per part when ordering.
Butt‑fusion and welded joints must be performed by trained, qualified PE welders using approved procedures and appropriate clamping. Follow PIPA for industry guidance for welding qualifications and practices.
Store fittings in their packaging, protected from direct sunlight and extreme heat. Keep spigots off the ground on pallets and avoid long‑term UV exposure to prevent surface degradation.
Yes—we provide transition spigots and spigot flange adaptors to interface PE pipe with metal valves or BSP/ANSI hardware. Custom drilling patterns and transition assemblies are available on request.
Browse our fittings range or contact us for compatibility advice.
