SOCIAL MEDIA IMPORTANT PVC UPDATE Keep up to date with the latest by following our social media pages 17th March 2026 Urgent PVC Supply Update – Force Majeure Event We have received notifications from multiple manufacturers of PVC / HDPE product within the industry since late afternoon Thursday 12th that a “Force Majeure” event has been called and this will have immediate and far reaching impact on the supply chain for the petrochemical industries. Specifically, after multiple meetings with our supply chain partners over the subsequent days and as further information was attained it has been made clear that the immediate impacts will see serious supply chain shortages in the immediate future across the industry. The direct impact on your PVC supply from UCS; All pricing for uPVC prior to 17th March 2026 is now invalid. Product lead times likely to exceed 3-4 weeks from order Scarcity / unavailability of product in immediate effect with likely ongoing market supply issues for the foreseeable future. This event is affecting all major PVC suppliers stock availability and capabilities. To elaborate, the recent escalation of conflict in the Middle East has had a substantial impact on global petrochemical markets and logistics. Disruptions to shipping routes through the Strait of Hormuz and attacks on regional infrastructure have interrupted the export of polymers and petrochemical feedstocks from the Gulf region. As a result, global PVC and PE resin supply has tightened, and prices have increased. In addition, the conflict has caused a sharp rise in crude oil, energy, and freight costs. The immediate impact felt across the Australian market has been: PVC and PE Resin suppliers have called “Force Majeure” cancelling all supply contracts and pricing. Resin suppliers have been unable to provide clarity on their ability to supply or the impact of the disruptions on the future price of their products. Spot offers for PVC resin scheduled for April 2026 delivery is currently up by as much as 50% compared with March 2026 pricing. Allocation of PVC resin for April and May 2026 has been halved by suppliers. PVC Resin suppliers have indicated potential shortfall in both product and logistics (no guarantees currently on shipping availabilities for April and May) The result is a current market environment that is highly volatile, with a significant degree of uncertainty. Based on preliminary advice from our suppliers and the provisions of our long‑term supply agreements, we do not yet have clarity on how PVC and PE resin availability or pricing may be affected. A more definitive assessment is not expected until April 2026. That said what can be determined currently and can be advised the following changes have been acknowledged: Across all of our suppliers effective immediately, all current quotations will be cancelled and deemed invalid. Effective immediately all current price files will expire. All Orders of PVC conduits must be accepted onsite when allocated by the PVC manufacturer, any declining or turn backs will result in allocations being cancelled. Current supply shortfalls will be manufactured and delivered as soon as practical. Further to the above though it has been made clear from three major suppliers that the situation is highly volatile and as such the above information may again change if more up to date information is attained. The most clear and immediate effect of the current “Force Majeure” is a highly expected materials shortage in the coming months which will directly impact availability of raw materials for manufacture of PVC conduit products, coupled with expected pricing increases. Moving forward pricing will be offered on 7-day validity based on pricing at time of quote. No new price files or long-term pricing can be issued during this period of market volatility. UCS will continue to work with our valued clients on finding the best possible outcomes for their projects As information comes to hand I will keep you and the team updated as practically available. If you have any questions or require any clarification, please do not hesitate to call your Account Manager. Kind Regards Underground Civil Supplies Document.pdf

CONDUIT FEEDERS MANDRELS Proving mandrels are used to test the circular integrity of a conduit after back filling. Made from high density polyethylene for long durability and inherent lubricity. Each DPM is assembled with galvanised wire rope and aluminium ferrules to create an eye at each end for fixing of rope for hauling. BELL-M FEEDING SHEAVE IN-LINE BELLMOUTH FEEDING SHEAVE In-Line Bell Mouth Feeding Sheave, placed inside conduit with "bell mouth" to aid with laying cables, also has spreader bolt to lock tight into conduit. Chrome zinc plated finish. LOCKABLE SHEAVE Lockable feeding sheave with roller (115/140mmOD) to aid the entrance and exiting of cables through conduits. LOCKABLE GUIDE Lockable Multiple Roller Guides - The quad roller is a multi-directional roller guide. This sheave has the added benefit of a hinged top roller for removal of cable and roller guide from conduit. Chrome zinc plated finish. SHEAVE 90 DEGREE RAD Lockable Feeding Sheave with 4 Rollers in 90° Radius. Lockable angled guiding rollers for inside manholes are set at 90° with a radius of 450mm. Suitable for directional changes within a manhole. The support frame rests against the wall offering added strength should the pull require it. Zinc plated finish on all with lockable with tension bolt. SLIPPER GUDE Cable slippers protect cables from sharp corners of conduit during laying. They are robust and economical with much thicker material than the cheaper versions on the market. Zinc plated finish.

PROJECTS Transgrid Substation UCS supplied the full electrical and drainage pit and pipe package to a regional NSW TransGrid substation project. The 1200x1200 precast concrete pits were custom built to strict TransGrid specifications. This is just one of many electrical substations UCS has supplied across the county in the last few years.

PROJECTS Western Sydney Airport - Badgerys Creek Client: Diona This project involves the relocation of a 3.2km section of an existing 330kV single circuit transmission line. Transmission line 39 is a 330 kilovolt (kV), single circuit overhead connection that extends 114 kilometres between the Sydney West and Bannaby substations. An approximate 3.2 kilometre section of Transmission Line 39 crosses Commonwealth land that is the designated site for the Western Sydney Airport (the airport site). The project involves the construction of a proposed 3.8 kilometre underground cable that generally follows the perimeter of the airport site. Following construction of the new underground cable, the existing 3.2 kilometre section of overhead transmission line that crosses Commonwealth land will be demolished.

PROJECTS 33kV Bulk Feeder Supply to New Campsie Traction Substation Contractor – Quickway Quickway were engaged to deliver the 33kV Bulk Feeder Supply to the new Campsie Traction Substation as part of the overall Sydney Metro City and Southwest Project. UCS was awarded the full PVC and Pit package from Quickway. The agreement saw UCS supply all 200mm and 63mm conduits, bends and fittings as well as the four large 8m long x 3m wide joint bays on the project. The Sydney Metro City and Southwest Project, the second stage of Sydney Metro, sees a new 30-kilometre metro line extending from Chatswood, under Sydney Harbour, through new CBD stations and southwest to Bankstown.

PROJECTS Norfolk Island AGL Upgrade Contractor – Avionics Avionics were engaged by Boral to design, supply, install and commission a new runway and taxiway lighting at Norfolk Island Airport. UCS supplied all conduits, bends/fittings and consumables to Avionics on the project. We arranged to have all items delivered to the Port of Brisbane where it was loaded into shipping containers and taken by ship across to the island.

PROJECTS Substation for Datacentre All conduits, bends, fittings, spacers and hardcover were supplied by UCS for this Electrical Substation powering a Western Sydney Datacentre. .

CORRUGATED CONDUIT UCS supplies Heavy Duty, Medium Duty Solar, Communications and Heavy Duty Draw Wire Electrical Corrugated conduits, all manufactured in Australia to the highest of standards. Facts: Made in Australia Lead free Corrugated conduit conforms to AS/NZS 2053.1:2001 with B.E.P. certified material HEAVY DUTY Heavy Duty corrugated conduit is available from 16mm to 63mm (external diameter) and 80mm (internal diameter). Unplasticised PVC is a cost-effective polymer with high resistance to impact, water, weather, chemicals and corrosive environments. Due to its orange colour and high compression strength, Heavy duty is ideal for underground electrical installations requiring the concealment and protection of electrical cables. Our heavy-duty is also UV stabilised to ensure strength and stability if subject to Australia’s harsh UV rays. 16mm to 63mm conforms to AS/NZS2053.5-2001 80mm Conforms to IEC 61386-22 4.4.2.1.2.2 Made in Australia Up to 80mm Diameter Extreme UV (T) Stabilised Lead-Free B.E.P Certified COMMUNICATIONS Medium Duty Communications Corrugated Conduit is manufactured in Australia to the highest standards. Conforming to AS/NZS 2053.5-2001 and made with B.E.P Certified material. Made in Australia Up to 50mm Diameter (up to 150mm on request see our Corrugated Joiner) Extreme UV (T) Stabilised Lead Free B.E.P Certified MEDIUM DUTY Medium Duty electrical corrugated conduit is manufactured in Australia to the Australian standards. Our Medium duty is light grey in colour with outstanding UV protection from Australia’s harsh sun with extreme UV resistance. Unplasticised PVC is a cost-effective polymer with high resistance to impact, water, weather, chemicals, and corrosive environments. Our PVC corrugated conduit is manufactured from B.E.P Certified material and conforms to AS/NZS2053.5:2001. MD is available from 16mm to 63mm Made in Australia Up to 63mm Diameter (80mm available as Heavy-duty) Extreme UV (T) Stabilised Lead-Free B.E.P Certified BLACK SOLAR HDT Solar Black PVC Corrugated Conduit is manufactured in Australia to the highest standards. Conforming to AS/NZS 2053.5-2001 and AS/NZS 5033:2012 Made in Australia Made from B.E.P Certified Material Extreme UV (T) Stabilised Lead-Free Suitable for Static Solar PV Installations Available from 20mm to 63mm Suitable for Static Solar PV Installations HD ELEC DRAW WIRE Heavy Duty (HD) Corrugated Conduit is manufactured in Australia to the highest standards. Made in Australia includes draw wire for easy cable installation. Up to 63mm Diameter Extreme UV (T) Stabilised Lead Free B.E.P Certified

OUR STORY Founded by Paul and Adam—with over a decade of combined industry experience—our company began its journey as a two man operation in a modest warehouse in Peakhurst. After three years of consistent growth, we expanded into a larger warehouse in Kingsgrove and acquired our first delivery truck. At that point, our team had grown to include three account managers and three support staff. In only 2 years we had already outgrown our Kingsgrove warehouse and moved again to our Moorebank location. This expansion necessitated internal growth as well, leading to the creation of new roles: an internal sales position and a projects coordinator, both designed to bolster support for our account managers and enhance operational efficiency. MM Electrical Merchandising (MMEM) acquired the business, implementing streamlined operations and optimizing productivity. We proudly opened a second branch in Brendale Queensland. With our new location now fully operational, we are well-equipped to support and supply all major infrastructure projects throughout the state. 2013 2016 2018 2021 2023 Within the last 4 years our team has doubled in size, culminating in some of our strongest growth this year—with a total of 17 talented professionals now on board. What began in a modest warehouse in Peakhurst has grown into a dynamic, thriving operation. And we’re just getting started! 2025