We’re Thames Boilers, your trusted local experts for unvented hot water cylinder servicing in Gravesend since 2017. With over 25 years of heating industry experience, our Gas Safe registered engineers specialise in maintaining and repairing all major cylinder brands, including Heatrae Sadia and Gledhill. We’ll keep your hot water flowing reliably with our thorough checks, digital service records, and convenient online booking system. Our 5-mile service radius guarantees we’re always nearby when you need expert cylinder care.
Why Choose Us To Service Your Unvented Hot Water Cylinder In Gravesend?

When it comes to servicing your unvented hot water cylinder in Gravesend, you’ll want a local expert who truly understands these complex systems.
At Thames Boilers, we’ve been maintaining unvented cylinders for over 25 years, and we’re aware exactly what it takes to keep them running safely and efficiently.
We understand the unvented advantages that make these systems popular in modern homes – from better water pressure to space-saving designs.
But we also recognise that proper cylinder maintenance is essential for both safety and performance.
As your neighbours in Kent, we take pride in delivering personalised service that puts your needs first.
You’ll get honest advice, reliable workmanship, and the peace of mind that comes from working with a trusted local professional who truly cares about your home’s hot water system.
Our Gas Safe registered team ensures every service meets strict safety standards and regulations while providing comprehensive maintenance of all major cylinder brands.
How It Works

We’ve made booking your unvented cylinder service incredibly simple with our online scheduling system, where you can choose your preferred date and time in just a few clicks.
On the day of service, you’ll receive a text message with a live tracking link so you can watch our engineer’s journey to your home in real-time.
Once we complete the service, we’ll email you a detailed digital certificate right away, making the whole process completely paperless and hassle-free.
1. Book Online
Booking your unvented hot water cylinder service couldn’t be simpler with our online scheduling system.
We’ve designed it to put you in control of your unvented cylinder maintenance, letting you choose the perfect appointment time that fits your schedule – even if that’s at midnight in your pyjamas!
When you’re ready to book, just hop onto our website and select your preferred date and time slot.
You’ll get an instant confirmation, so there’s no waiting around wondering if your booking went through.
On the day of service, we’ll send you a friendly text with a live map link, so you can track our engineer’s arrival in real-time.
Once we’re done, we’ll email your digital certificate straight away – no paperwork hassles!
Our online job booking system streamlines the entire process from start to finish.
The online booking benefits speak for themselves: convenience, control, and complete peace of mind.
2. On Our Way Text
Once you’ve booked your appointment, our smart tracking system takes over to keep you in the loop. We believe you shouldn’t have to wonder when we’ll arrive, so we’ve made the process completely transparent.
On the morning of your service, you’ll receive an automated text message with a unique link. This isn’t just any ordinary service reminder – it’s your personal window into our engineer’s journey to you.
Click the link, and you’ll see our location on a live map, complete with our expected arrival time. No more waiting around or wondering where we are!
Our customer notifications system means you can track us in real-time, just like you’d a delivery driver. It’s all part of making your experience with us as convenient as possible.
With over 25 years of experience servicing homes across Kent, you can trust our expertise to get the job done right.
3. Service Your Boiler & Issue Your Certificate
Taking care of your boiler couldn’t be simpler with our streamlined service process. When we arrive at your home, we’ll get straight to work on your boiler maintenance, ensuring every component is thoroughly checked and serviced to maintain peak cylinder efficiency.
We understand you’re busy, which is why we’ve made the certification process completely paperless. As soon as we complete your service, we’ll email you a detailed digital certificate – no waiting around or chasing paperwork!
This instant documentation means you’ll have proof of service right at your fingertips.
You’ll love how easy we’ve made it to keep your unvented hot water cylinder in top condition. We handle all the technical stuff while keeping you informed every step of the way, so you can rest easy knowing your system’s in good hands.
Our comprehensive service includes flue gas analysis and thorough component cleaning to ensure maximum efficiency and safety.
Book Your Gravesend Unvented Cylinder Service Online Today

Ready to book your unvented cylinder service in Gravesend?
Click our online booking system to schedule your appointment at a time that suits you. The whole process takes just 2 minutes, and you’ll receive instant confirmation.
Plus, on the day of service, we’ll send you real-time tracking updates so you know exactly when we’ll arrive.
Our comprehensive coverage area ensures we can effectively serve all Gravesend postcodes.
Customer Reviews

Thames Boiler reviews demonstrate our commitment to quality service in Gravesend.
Benefits of Servicing Your Unvented Cylinder

Regular servicing of your unvented hot water cylinder isn’t just another maintenance task – it’s an essential investment in your home’s safety and efficiency.
Just like you wouldn’t skip your car’s MOT, your cylinder needs regular attention to keep performing at its finest.
We’ve seen firsthand how proper maintenance helps our customers avoid those dreaded cold showers and unexpected breakdowns.
When you book a service with us, we’ll check the pressure relief valves, inspect for any wear and tear, and guarantee all safety devices are working correctly.
These checks help prevent limescale buildup, maintain peak water pressure, and extend your cylinder’s lifespan.
Plus, you’ll enjoy peace of mind knowing your system is operating safely and efficiently, potentially saving you money on energy bills in the long run.
With over 25 years of experience in the heating industry, we understand the importance of maintaining your home’s hot water systems to prevent major malfunctions.
Unvented Cylinder Repairs In Gravesend

Living with a faulty unvented cylinder in Gravesend can be frustrating, especially when you’re dealing with issues like dripping overflow pipes or unreliable hot water pressure.
We comprehend how these common cylinder issues can disrupt your daily routine and leave you searching for unvented maintenance tips.
At Thames Boilers, we regularly help homeowners tackle everything from faulty pressure relief valves to tripped overheat thermostats.
When you notice water dripping from your tundish or experience fluctuating hot water pressure, it’s often a sign that your expansion vessel or cold water combination valve needs attention.
Sometimes, it’s as simple as resetting an overheat thermostat, but if it keeps tripping, we’ll investigate the underlying cause to guarantee your cylinder works reliably for years to come.
Our digital service records provide detailed documentation of all maintenance work performed on your unvented cylinder system.
Unvented Cylinder Brands We Can Service in Gravesend

Working with all major unvented cylinder brands in Gravesend, we’ve developed extensive expertise servicing popular manufacturers like Heatrae Sadia’s Megaflo range and Gledhill’s premium models.
You’ll love the benefits of Heatrae Sadia’s reliable performance and Gledhill’s advanced features for your home.
We’re well-versed in maintaining everything from Telford’s ultra-durable Tempest cylinders to Vaillant’s seamlessly integrated uniSTOR systems.
Whether you have a Viessmann cylinder known for its efficiency, an RM Cylinder that’s easier to maintain, or a versatile Kingspan unit, we’ve you taken care of.
We also work with affordable Everflo systems and Joule’s renewable-compatible Cyclone range.
Trust us to keep your cylinder running smoothly, no matter the brand you’ve chosen for your home.
Our Gas Safe registered engineers bring 25 years of experience to every cylinder service appointment.
Frequently Asked Questions About Unvented Hot Water Cylinder Servicing in Gravesend

We understand you’ve got questions about unvented cylinder servicing, and we’re here to help clear things up.
A service won’t fix existing problems (you’ll need a repair for that), and we’ll need our G3 qualification to work on your cylinder safely.
If you’re looking to have both your boiler and cylinder serviced, we can do this in the same visit – just check our pricing page for our rates.
For your safety and legal compliance, all our engineers are listed on the Gas Safe Register to perform gas work properly.
Will a service fix any problems with my unvented cylinder?
Many homeowners wonder if a regular service will resolve existing problems with their unvented cylinder, but the answer is straightforward – no, it won’t.
Think of unvented cylinder maintenance like your car’s annual service – it’s preventative care, not a repair solution. When we perform a service, we’re checking components, ensuring safety devices are working correctly, and maintaining the system’s efficiency.
But if your cylinder’s already showing issues, like inconsistent hot water or unusual noises, you’ll need to book a repair visit instead.
We know it can be frustrating when you’re facing problems, but we’re here to help. Just give us a call or use our online booking system, and we’ll diagnose and fix any issues your unvented cylinder might have.
If my unvented cylinder develops a fault after a service, do I need to pay for another visit?
When your unvented cylinder develops a fault after its annual service, you’ll need to book and pay for a separate repair visit.
It’s understood this might seem frustrating, but it’s important to understand the service limitations. Just like your car’s MOT doesn’t prevent future breakdowns, a cylinder service is a maintenance check, not a guarantee against future problems.
During a service, we’re checking components and ensuring everything’s working correctly at that moment. If a fault occurs later, we’ll need to perform specific fault diagnosis to identify and fix the issue.
Think of it like getting your teeth cleaned at the dentist – while it’s great preventive care, it doesn’t mean you won’t develop a cavity later that needs separate treatment.
We’re always here to help when issues arise.
Is a Megaflo an unvented hot water cylinder?
Understanding different cylinder types brings us to a common question about one of the most popular brands. Yes, a Megaflo is indeed an unvented hot water cylinder, and we’re familiar with its excellent reputation among homeowners in Gravesend.
As heating experts, we often recommend Megaflo features to our customers because they offer significant unvented advantages.
The system provides better water pressure than traditional vented cylinders, which means you’ll enjoy more powerful showers and faster-filling baths.
We’ve found that many of our customers appreciate how Megaflo units deliver hot water consistently to multiple taps simultaneously – perfect for busy family homes.
It’s like having the convenience of a combi boiler but with the added benefit of storing plenty of hot water for when you need it most.
Do you need special qualifications to work on unvented cylinders?
Safety regulations around unvented cylinders are strict for good reason – these systems operate under high pressure and need expert handling.
That’s why we hold the specialist G3 qualification, which is absolutely required for working on unvented cylinders. While many heating engineers have their Gas Safe registration, not all of them possess this essential additional certification.
When it comes to unvented cylinder safety, you’ll want someone who truly knows what they’re doing.
Think of it like this: you wouldn’t want a regular mechanic working on a Formula 1 car! It’s a similar principle with unvented cylinders – they’re sophisticated systems that need properly qualified experts.
That’s why we’ve invested in getting the right qualifications to keep your home safe and your hot water flowing reliably.
Can you service my boiler at the same time?
Many homeowners ask if they can combine their unvented cylinder service with their annual boiler service – and we’re happy to say yes!
We understand that coordinating multiple service appointments can be a hassle, which is why we’ve designed our service packages with your convenience in mind. By booking both services together, you’ll save time.
Our rates can be found on our website’s pricing page.
It’s like getting all your car’s maintenance done in one visit – practical and efficient! Plus, you’ll have peace of mind knowing that both your heating systems are being looked after by a qualified professional who’s thoroughly familiar with your home’s setup.
How much does an unvented cylinder service cost?
Speaking of services, a question we hear often involves the cost of unvented cylinder servicing.
We’ve made it easy for you to compare costs and make informed decisions by listing all our pricing details transparently on our website’s pricing page. When you’re ready to explore your options, just head over to www.thamesboilers.co.uk/prices.
For even better value, we offer combined rates when you book your cylinder service alongside your annual boiler service.
It’s worth checking out these options, as they’re designed to help you maintain both systems while keeping costs manageable.
We believe in making essential home maintenance affordable without compromising on quality, and we’re always happy to explain the service benefits that make our pricing competitive.
How much does an unvented cylinder repair cost?
When it comes to unvented cylinder repairs, we’ve made accessing our pricing details straightforward and transparent.
To find our current repair costs, just visit our pricing page at thamesboilers.co.uk/prices, where you’ll see all our unvented cylinder maintenance options clearly listed.
We know that dealing with cylinder issues can be stressful, which is why we aim to make the repair process as smooth as possible for our local Gravesend neighbours.
Whether you’ve got a Megaflo or another brand, we’re qualified to handle your repairs (as long as it’s not a commercial unit or over 350 litres).
And here’s a helpful tip: be sure to book a boiler service alongside your repair.
My make of cylinder isn’t listed – can you still work on it?
The brand or model of your unvented cylinder isn’t a deal-breaker for us. We’re experienced with a wide range of unvented cylinder compatibility and service options, so you can feel confident in our expertise.
Whether you have a lesser-known brand or a popular model, we’ve got you supported.
There are just two exceptions to keep in mind: we don’t work on commercial cylinders or units over 350 litres in capacity, as these require specialised industrial equipment.
For everything else, you’re in good hands with our G3-qualified engineers. We’ve seen and serviced practically every domestic unvented cylinder out there, and we’re always happy to help homeowners like you keep their hot water systems running smoothly.
About Thames Boilers

Since our founding in 2017, we’ve built Thames Boilers on a foundation of expert knowledge and genuine care for our customers in Kent.
As heating industry trends have evolved, we’ve stayed focused on what matters most – providing reliable, professional service with a personal touch.
We’re proud to be your local heating experts, bringing over 25 years of experience right to your doorstep.
Our online booking system makes scheduling easy, and our real-time tracking keeps you informed every step of the way.
While we’re tech-savvy, we haven’t lost that personal connection that makes us different from larger companies.
As a Gas Safe registered business, we specialise exclusively in domestic gas boilers and heating systems, ensuring you get the focused expertise your home deserves.
We Cover Gravesend And The Surrounding Area

We cover an extensive 5-mile radius around Gravesend, providing unvented hot water cylinder servicing to the following locations:
- Northfleet
- Milton
- Singlewell
- Denton
- Chalk
- Higham
- Shorne
- Cobham
- Istead Rise
- Bean
- Swanscombe
- Stone
- Greenhithe
- Perry Street
- Hook Green
- Meopham
- Sole Street
All these locations receive our full range of unvented cylinder maintenance and servicing solutions, with prompt response times and professional service.
Book Your Gravesend Unvented Cylinder Service Online Today

Ready to book your unvented cylinder service in Gravesend?
Visit our online booking system to schedule your appointment at a time that suits you. Simply click here to book online and receive instant confirmation.
Our straightforward booking process takes just a few minutes, and you’ll get real-time tracking updates when we’re on our way.
Book your service today to guarantee your hot water cylinder continues running safely and efficiently.

