The unit on your wall is not the first one to stand there. Fremantle's port core is limestone and masonry cottages and terraces built from the 1800s into the early 1900s, and plumbers have been replacing hot water systems in these streets for more than a century. A position here has carried several units across generations, not one fitted with a new house. So what you remember about the last changeover counts: where it stood, what fuel it ran on, whether anything went up on the roof. At properties in Fremantle, WA, MCN Plumbing Perth handles hot water repairs, and hot water system installation and replacement across gas, electric, solar and heat pump. Two things start the job: what is on the wall, and what was there before.
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If your house is one of the old port-centre cottages or terraces, the roof is the option you don’t have. The cavity is shallow or missing altogether and the roof form faces the street, so a cylinder cannot go up out of sight and collectors on a front pitch change what the footpath sees. That leaves a side wall or the courtyard behind.
Our plumber measures the wall before anyone orders a unit. That means clearances from the windows and openings, the distance to the boundary, where a flue can terminate clear of a neighbour’s opening, and where relief water discharges in the open where you would see it. A walled courtyard makes that last one harder, with nowhere obvious to send the discharge.
The position then narrows the shortlist. A storage cylinder can reuse the footprint already there. A continuous flow unit frees that footprint but draws far more gas, so our plumber reads the meter box and the line first. A heat pump needs clear air all round it and a condensate drain, which a small walled courtyard rarely allows. A terrace with no side gate means everything travels through the house.
Fremantle addresses generally fall under the City of Fremantle, and that is the council an approval question runs through. The City keeps a Heritage List, its itemised record of protected fabric, current to March 2024 and reaching from whole dwellings down to limestone features on private lots.
An internal repair, or a swap back into a position nothing outside can see, stays ordinary plumbing work. The question arrives when the change would show from the street: a unit moved onto a front elevation, a new flue penetration through it, collectors on a visible roof pitch. Where the property is listed or surveyed, approval comes before plumbing, and that sequence would not arise a few suburbs inland.
North Fremantle and South Fremantle answer to the City as well. East Fremantle has its own local government, the Town of East Fremantle, north-east of the port city. This page means the City. Send the street with your enquiry and we’ll say which of the two an approval would run through.
Milad Nasr has owned MCN Plumbing Perth since 2015, and what you can tell us about the building before we arrive shapes who we send and what they bring. What we bring is not tied to one supplier, and Rheem, Rinnai, Vulcan, Bosch and AquaMax are all brands we work with. The plumber MCN sends to an old Fremantle building holds a licence, carries insurance, and reads the position before pricing the unit. MCN offers 100% guaranteed results across all of our work, so ask which one covers your job. Full credentials are set out on our hot water systems page.
MCN takes emergency calls day or night, weekends included, and a cylinder that has let go in a walled courtyard is one of them.
Booked work carries its own commitment. Place the job before 10:30am on any day and MCN guarantees a same-day service, with non-urgent work covered as well: the unit going short, the plant swap a strata committee has finally approved. The morning cut-off is the condition attached to it, not the promise itself.
Strata companies and managing agents book through our service for property managers. A hospitality or commercial tenancy is the other regular caller: the premises cannot open without hot water at the handbasins, so that decides how we stage a changeover, not whether it happens.
A failure is not automatically the end of a unit. While the fault is an element, a thermostat, a gas control valve or an ignition part, our plumber replaces it and the system runs on. Three things finish a unit: water escaping from the cylinder body itself, a heat exchanger that has failed, and parts nobody still makes.
On a position that has already carried more than one system, the repair question has a second half: what the position itself will need when the unit goes. A changeover here isn’t a straight substitution. Our plumber works to AS/NZS 3500, a standard written about the installation rather than the appliance: where the unit stands, how the flue terminates, where relief water discharges. Under it a new or relocated system has to deliver water to the bath, basin and shower at or below the regulated maximum temperature, and achieving that falls on the installer, who fits and commissions the tempering device.
Earlier changeovers leave their own work behind: a flue penetration cut through masonry two generations back, brackets still fixed where a solar system came down, a gas line sized for a storage burner rather than a continuous flow draw. Our plumber resolves those on the day. Where the fault is buried in the fabric, not in the unit on the wall, that is general plumbing on a limestone building.
Four answers to have before you sign anything off:
A failed water heater and a mains problem look alike from the shower. The cold tap at the kitchen sink separates them. Cold running normally while the hot side gives you nothing points at the water heater or the pipework feeding it, which is our work. Cold pressure down at every tap, or water off colour on both sides, belongs with the Water Corporation. Gas is the exception to both: if you smell it near the unit, get everyone out, ring the gas network operator’s emergency line, and a gasfitter attends once the site is safe.
Two lines settle this job, on 0418 871 934. Our inbox is info@mcnplumbingperth.com.au, and the form on this site lands in the same place. Message us through this site with your Fremantle address and the make on the wall, then add whatever you know about the unit before it. On a building this old, that second line is what nobody else can supply, and it decides how much of the work is a swap.
Also Servicing the surrounding area
At the unit, and what it is decides the order. On electric storage it is the element, the thermostat, then the circuit feeding them. On gas it is the gas control valve, the burner and the ignition, plus a flue that has partly closed up. A continuous flow unit reports a lockout code naming the fault.
No single number covers it, and on this stock the answer turns on what nobody wrote down. Type, workload and service history count for more than the date on the plate. Have yours inspected while it is still running and ask what is left in it. If it’s already failed twice in a year, that’s your answer.
The building answers this before any brochure does. With no usable roof cavity and a street-facing roof, a roof-mounted solar system is off the list on many of these houses. A walled courtyard decides whether a heat pump has the airflow, and the gas at the meter box decides whether continuous flow is realistic. MCN fits all four system types and works across the makes, so the fabric picks the unit.
A sacrificial anode is a consumable inside a storage cylinder, replaced at a service, not on a schedule you can see from outside. On a tank that changed hands with the house that history is missing, so our plumber draws the anode and shows you what is left of it. That is also the fastest honest read on the cylinder’s remaining life.