OSO cylinder specialists
OSO cylinder replacements in Manchester
Repairs and like-for-like replacements for OSO hot water cylinders across Manchester apartments - one of the most common cylinders in city-centre flats. G3 qualified, tidy, certified.
OSO cylinders, in plain English
OSO cylinder replacements across Manchester
OSO is one of the most common hot water cylinder brands fitted in Manchester apartments ‑ so we see and replace a lot of them. If yours is leaking, corroded or worn out, we can help.
Because OSO cylinders are so common in city-centre developments, we know them well ‑ how they’re plumbed, how they fail, and how to swap them cleanly for a like-for-like replacement. We’ll tell you honestly whether yours can be repaired or has reached the end of its life.
We work on all common apartment cylinder brands:
OSO cylinder trouble?
Common OSO cylinder problems we fix
Leaks, dripping tundishes, failed valves or no hot water ‑ these are the OSO cylinder faults we repair and replace across Manchester.
No hot water in the apartment
Nothing coming through hot at any tap. Often a tripped immersion, failed heater element or a control fault ‑ we’ll find it fast.
Hot water only getting lukewarm
Water heats but never gets properly hot, or runs out fast. Usually a thermostat, element or blending-valve issue.
Faulty immersion heater
The immersion won’t heat, keeps tripping the electrics or has burnt out. We replace immersion heaters and elements.
Faulty thermostat
Water too hot, too cold or wildly inconsistent. A failed cylinder thermostat is one of the most common causes.
Blending / mixing valve issues
A seized or failed blending valve can leave you with scalding or lukewarm water. We test, adjust and replace them.
Expansion vessel problems
Dripping, banging pipes or discharging water often points to a failed expansion vessel. We recharge or replace them.
Pressure relief valve issues
Water discharging outside or from the tundish usually means a PRV or expansion fault. We diagnose it safely.
Tundish dripping
That little clear fitting dripping or overflowing is a warning sign ‑ we’ll find why it’s discharging and put it right.
Cylinder making noise
Banging, rumbling or hissing from the cylinder or pipes. Often limescale, expansion or valve related ‑ and fixable.
Hot water cylinder leaking
Water pooling around the cylinder or in the cupboard below. We identify the source and advise repair or replacement.
High-rise & apartment systems
Pressure, flow and shared-system quirks in flats and towers. We work in city centre developments every week.
Emergency hot water
No hot water and can’t wait? We offer emergency hot water repairs across Manchester where possible ‑ just call.
OSO cylinder leaking or worn out?
Specialist OSO cylinder repairs and like-for-like replacements across Manchester ‑ G3 qualified, tidily installed, certified and guaranteed. Get a quote.
OSO work & more
The full range of cylinder work
We know OSO cylinders inside out ‑ and here’s the wider range of electric and unvented work we carry out, all G3 qualified.
Electric hot water cylinder repairs
Fast diagnosis and repair of electric and unvented cylinders ‑ elements, thermostats, valves, controls and leaks.
Unvented cylinder servicing
Annual servicing to keep your unvented cylinder safe, efficient and compliant ‑ vessels, valves and safety checks.
Unvented cylinder replacements
Full replacement of failed or ageing cylinders, sized correctly for your flat, with tidy pipework and certification.
Immersion heater replacements
Replacement of burnt-out or tripping immersion heaters and elements ‑ a common apartment hot water fix.
OSO cylinder replacements
Specialists in OSO hot water cylinders ‑ repairs and like-for-like replacements common in Manchester apartments.
G3 qualified unvented work
All unvented work carried out by G3 qualified engineers, so it’s safe, legal and properly documented.
Landlord & letting agent work
Reliable hot water repairs, servicing and installs for landlords, letting agents and apartment blocks.
Emergency hot water repairs
No hot water and it’s urgent? We attend emergency hot water callouts across Manchester where possible.
Real OSO work
From worn to like-new
Ageing OSO cylinders swapped for clean like-for-like units with tidy pipework ‑ the swaps we do across Manchester apartments.
Where we work
OSO cylinders across Manchester
OSO cylinders fill Manchester and Salford’s apartment blocks ‑ and we work on them throughout the city centre and beyond.
Done properly
Swapped cleanly, tested and certified
Every OSO replacement is a clean like-for-like swap where possible, tested and certified, with tidy pipework and a guarantee.
Photos shown are examples of typical HotFix cylinder work.
Why choose HotFix
The OSO specialists in Manchester
Because OSO cylinders are so common here, we see and fix them constantly. HotFix is a registered, insured, G3 qualified OSO specialist.
G3 qualified
Every OSO cylinder we work on is handled to G3 standards ‑ safe, legal and certified.
NAPIT registered
NAPIT registered, so your OSO repair or swap is signed off by verified professionals.
Public liability insured
Fully insured for OSO cylinder work in your home or apartment block.
Invoices & guarantees
Every OSO job is invoiced and guaranteed, with certification for replacements.
OSO cylinder replacements in Manchester
If you live in a Manchester apartment, there’s a strong chance your hot water comes from an OSO cylinder. OSO is a leading manufacturer of stainless steel unvented hot water cylinders, and they’ve been fitted as standard in a huge number of city-centre and high-rise developments across Manchester and Salford. Because they’re so common, they’re one of the cylinders we repair and replace most often ‑ so we know them inside out. If your OSO cylinder is leaking, corroded, noisy or simply worn out, HotFix can help.
Why OSO cylinders are everywhere in Manchester flats
OSO cylinders are popular with developers because they’re compact, well-made stainless steel units that suit apartment living ‑ they fit neatly into an airing cupboard and deliver mains-pressure hot water to the taps and showers. That’s great when they’re working. The downside is that when a whole building is fitted with the same cylinders at the same time, they also tend to reach the end of their life around the same time ‑ which is why we’re often called to blocks where several flats need attention.
Repair or replace? We’ll tell you straight
Not every OSO fault needs a new cylinder. Many issues are repairs:
Common OSO repairs
A dripping tundish (the small safety fitting above the cylinder that should stay dry), water discharging outside, a failed expansion vessel (the part that soaks up pressure as water heats), a worn pressure or temperature relief valve, or a failed immersion element ‑ these are all repairs we carry out on OSO cylinders regularly.
When a replacement makes sense
If the cylinder body itself is leaking, heavily corroded, or you’re facing repeated faults on an ageing unit, a like-for-like replacement is the sensible choice. Because we know the OSO range, we can usually match your existing cylinder closely for a clean swap with minimal changes to the pipework ‑ or recommend a better-suited size if your household has changed.
Like-for-like OSO swaps, done cleanly
A tidy replacement matters in a flat, where space is tight and a leak affects your neighbours. We take the time to isolate and drain safely, swap the cylinder, and leave the pipework clean, level and accessible. Because OSO cylinders are unvented (sealed and pressurised), the work must be carried out by a G3 qualified engineer ‑ the recognised qualification for working on these systems safely. Every replacement we fit is certified, invoiced and guaranteed.
OSO specialists for apartments and landlords
We work throughout Manchester’s apartment areas ‑ the city centre, Salford Quays, Deansgate, Ancoats, the Northern Quarter, MediaCity, Castlefield and beyond. For landlords, letting agents and building managers, we’re a reliable single point of contact when OSO cylinders start failing across a block: we can assess multiple flats, prioritise the urgent ones, and keep the paperwork and invoicing clean per property.
Honest advice and clear quotes
HotFix is the specialist hot water arm of City Centre Maintenance MCR Ltd ‑ a registered, fully insured company. We give clear quotes that separate the cylinder, the labour and the certification, so you can see exactly what you’re paying for. And if your OSO cylinder can be repaired rather than replaced, we’ll tell you ‑ we’d rather keep you as a long-term customer than sell you a cylinder you don’t need.
How do I know if I have an OSO cylinder?
Look for the OSO name on the front of the cylinder or on its data label, usually near the top. If you’re not sure, send us a photo ‑ we recognise OSO cylinders and their common models straight away, and we’ll tell you exactly what you’ve got and what it needs.
Common questions about OSO cylinders
Are OSO cylinders any good?
Yes ‑ OSO make solid stainless steel unvented cylinders, which is why so many Manchester developers fit them. Like any cylinder they still need annual servicing and will eventually wear out, but they’re a quality unit that’s well worth maintaining.
Can you replace an OSO with the same model?
Usually, yes. Because we know the OSO range, we can match your existing cylinder closely for a clean like-for-like swap ‑ or recommend a better-suited size if your household has changed.
My OSO tundish is dripping ‑ is that serious?
It’s worth acting on. A dripping tundish usually means the expansion vessel or a pressure valve has failed and the cylinder is releasing pressure it shouldn’t. It’s a common, fixable OSO repair ‑ don’t ignore it.
How long will an OSO cylinder last?
With annual servicing, around 10-15 years is typical. Hard water and skipped services shorten it. If yours is ageing and playing up, we’ll advise whether a repair or a like-for-like replacement is better value.
Get your OSO cylinder repaired or replaced in Manchester
Whether your OSO cylinder needs a quick repair or a full like-for-like replacement, we can help. Send a photo of the cylinder and its data label by WhatsApp, or fill in the form below, and we’ll advise on the best option and give you a clear, honest quote.
Related HotFix services in Manchester
- Electric Hot Water Cylinders Manchester
- Electric Hot Water Cylinder Repairs Manchester
- Unvented Cylinder Servicing Manchester
- Unvented Cylinder Replacements Manchester
- Immersion Heater Replacements Manchester
- G3 Qualified Unvented Work Manchester
- Hot Water Repairs for Landlords Manchester
- Emergency Hot Water Repairs Manchester
What customers say
Trusted by Manchester residents, landlords & agents
“No hot water in our apartment on a Sunday. Called HotFix, they diagnosed a failed immersion, replaced it and we had hot water back the same day. Clean, polite and gave a proper invoice.”
“Our OSO cylinder was leaking. They replaced it with a like-for-like unit, tidied all the pipework and certified the unvented work. Exactly what our block needed.”
“As a letting agent I use HotFix for cylinder issues across several flats. Reliable, properly qualified and they always send an invoice and guarantee. Highly recommend.”
Review examples ‑ to be replaced with live Google reviews.
Get an OSO cylinder quote
Send us a photo of your OSO cylinder and its label by WhatsApp, or fill in the form ‑ and we’ll advise on a repair or a like-for-like replacement with a clear quote.
Get in touch
Book a repair or ask a question
Fill in the form and attach a photo of your cylinder if you can ‑ it helps us advise you faster. Prefer to talk? Call us directly.
You can also send photos by WhatsApp. We usually reply the same day.
Piccadilly Business Centre, Aldow Enterprise Park
Manchester, M12 6AE
Send photos by WhatsApp. Snap the cylinder, its label, the fault, the tundish or the immersion heater and we'll advise the next step.
HotFix is the electric hot water cylinder specialist service of City Centre Maintenance MCR Ltd. G3 qualified repairs, servicing and installs for unvented and electric cylinders across Manchester.