The Trade Convergence No One Predicted
Twenty years ago, electricians, plumbers, and gas fitters operated in completely separate worlds. An electrician never needed to understand water pressure. A plumber never needed to understand electrical load calculations. A gas fitter never imagined their trade would become a decommissioning service.
The electrification wave has changed everything.
Today, the fastest-growing category of residential and commercial work in Australia requires all three trades simultaneously:
- Heat pump hot water: Plumber (water connections, tempering valve, pipe modifications) + Electrician (dedicated circuit, switchboard upgrade, controls wiring)
- Gas appliance replacement: Gas fitter (safe disconnection, pipe capping, compliance certificate) + Electrician (new circuit for induction cooktop, heat pump, or electric heating)
- Hydronic heating conversion: Plumber (hydronic loop modifications) + Gas fitter (boiler decommission) + Electrician (heat pump power supply)
- Commercial HVAC electrification: Refrigeration mechanic (heat pump commissioning) + Plumber (condensate, water-cooled systems) + Electrician (3-phase supply, VSD drives, BMS integration)
"Last year, 62% of our residential jobs required two or more trade licences. This year it's 74%. The electrification wave means almost every job now crosses traditional trade boundaries. The old model — where a homeowner coordinates a plumber on Tuesday and an electrician on Thursday — is broken. They want one call, one crew, one invoice." — Mark Willis, Head of Renewables & Electrification, Cable Co
The Problem with Separate Contractors
When a homeowner decides to replace their gas hot water system with a heat pump, the traditional model looks like this:
The Old Way (2-3 separate contractors)
| Step | Contractor | Wait Time | Cost |
|---|---|---|---|
| 1. Quote for plumbing work | Plumber | 3-5 days for quote | $150 (if charged) |
| 2. Quote for electrical work | Electrician | 3-5 days for quote | $150 (if charged) |
| 3. Plumber attends — disconnects old system, preps pipes | Plumber | 1-2 weeks booking | $800-$1,200 |
| 4. Electrician attends — installs circuit, switchboard work | Electrician | 1-2 weeks booking | $600-$900 |
| 5. Plumber returns — connects new heat pump to water | Plumber | 3-5 days return visit | $400-$600 |
| 6. Electrician returns — final connection + commissioning | Electrician | 3-5 days return visit | $200-$400 |
| Total | 2 contractors, 4-6 visits | 3-6 weeks | $2,300-$3,400 (labour only) |
The New Way (Multi-trade provider)
| Step | Crew | Wait Time | Cost |
|---|---|---|---|
| 1. Single quote (plumbing + electrical scoped together) | Multi-trade team | 1-2 days | Free |
| 2. Crew attends — plumber + electrician together | Combined crew | 3-7 days booking | $1,600-$2,200 |
| Total | 1 provider, 1-2 visits | 4-9 days | $1,600-$2,200 (labour only) |
Saving: $700-$1,200 per job (20-35%) — plus 2-4 weeks faster completion.
Why This Matters for Industry and Commercial
For commercial and industrial clients, the coordination problem is exponentially worse:
Commercial Heat Pump HVAC Retrofit (typical 1,000m² office)
Trades required:
- Electrician — 3-phase supply upgrade, new circuits, VSD drives, BMS wiring
- Refrigeration mechanic — heat pump installation, refrigerant charging, commissioning
- Plumber — condensate drainage, water-cooled condenser connections (if applicable)
- Gas fitter — existing gas heater decommission, pipe capping, compliance cert
- Sheet metal worker — ductwork modifications (if changing from gas ducted)
- Controls technician — BMS programming, sensor installation
Under the old model: 4-6 separate contractors, 8-12 weeks, constant coordination by the building manager.
Under Cable Co's multi-trade model: one project manager, one crew (multiple licensed trades), 3-4 weeks, single invoice.
The Residential Electrification Package: Every Trade Under One Roof
Cable Co's expansion into plumbing and gas fitting means we now deliver complete home electrification as a single-contractor package:
| Service | Trade Required | Cable Co Capability |
|---|---|---|
| Heat pump hot water installation | Plumber + Electrician | ✓ Both in-house |
| Gas hot water decommission | Gas Fitter + Plumber | ✓ Both in-house |
| Induction cooktop (replacing gas) | Gas Fitter + Electrician | ✓ Both in-house |
| Gas heating decommission | Gas Fitter | ✓ In-house |
| Reverse-cycle AC installation | Electrician + Refrigeration | ✓ Both in-house |
| Solar panel installation | Electrician (CEC accredited) | ✓ In-house |
| Battery storage installation | Electrician | ✓ In-house |
| EV charger installation | Electrician | ✓ In-house |
| Switchboard upgrade (for electrification) | Electrician | ✓ In-house |
| Gas meter removal (final disconnection) | Gas Fitter + Network coordination | ✓ In-house |
The Business Case for Homeowners
A complete gas-to-electric conversion for a typical 3-bedroom Sydney home:
| Item | Multi-Trade Package Price | Separate Contractors Price | Saving |
|---|---|---|---|
| Heat pump HW (supply + install) | $4,200 | $4,800 | $600 |
| Gas HW decommission + removal | Included | $450 | $450 |
| Induction cooktop (supply + install) | $2,800 | $3,400 | $600 |
| Gas cooktop decommission | Included | $350 | $350 |
| Gas heater → reverse-cycle AC | $3,200 | $3,900 | $700 |
| Gas line capping + compliance cert | Included | $600 | $600 |
| Switchboard upgrade (if needed) | $1,200 | $1,500 | $300 |
| Gas meter removal coordination | Included | $200 (your time) | $200 |
| TOTAL | $11,400 | $15,200 | $3,800 (25%) |
After rebates (STCs + Home Energy Saver): $7,200 out of pocket
Annual gas bill eliminated: $2,200-$3,400/year
Annual electricity increase: $600-$900/year
Net annual saving: $1,300-$2,500/year
Payback on net cost: 2.9-5.5 years
For Industry: The Critical Infrastructure Argument
Industrial facilities face the same convergence at larger scale:
- Food processing: Gas boilers → heat pump hot water (plumber + electrician + gas fitter)
- Manufacturing: Gas-fired ovens → electric induction/IR heating (electrician + gas fitter)
- Warehouses: Gas radiant heaters → heat pump systems (electrician + refrigeration + gas fitter)
- Data centres: Cooling system upgrades (electrician + plumber + refrigeration)
- Hospitals: Steam boiler replacement with heat pump (all trades)
The common thread: every industrial electrification project requires multiple trade licences working in coordination. The contractor who holds all licences under one roof eliminates the coordination tax.
Powering What's Next: Cable Co's Multi-Trade Vision
Cable Co's expansion into plumbing and gas fitting isn't diversification for its own sake. It's the recognition that critical infrastructure delivery in 2026 and beyond requires integrated multi-trade capability.
The buildings of the future are all-electric. The transition from gas to electric requires every trade working together. The contractor who can deliver the complete package — solar, battery, heat pump HVAC, heat pump hot water, induction cooking, EV charging, gas decommission — under one project manager, one SLA, one invoice — wins.
That's what "Powering What's Next" means.
Free C.A.B.L.E. Method™ Assessment: https://cable-co.com.au/energy-assessment
Call: 1800 117 177