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Unvented Hot Water Cylinders

High-Pressure Hot Water Systems Installed, Serviced & Repaired by Qualified Engineers

Do you have a modern property, larger family home and/or multiple bathrooms where a consistent supply of high-pressure hot water is essential? Unvented hot water cylinders are an ideal solution for you.

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Unvented Hot Water Cylinders
INSTALLATION, SERVICING & REPAIRS
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Our Service Includes
Visual inspection
Expansion vessel checks
Thermostat testing
Immersion heater inspection
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Benefits of Regular Servicing
Improved efficiency
Increased reliability
Longer cylinder lifespan
Early fault detection
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We Repair Problems Including
No hot water
Poor water pressure
Water leaks
Expansion vessel faults
WHY CHOOSE US
Why Customer Choose Mark Abraham

At Mark Abraham Gas, we specialise in the installation, servicing, repair and maintenance of unvented hot water cylinders. Our qualified engineers guarantee every system is installed safely, maintained correctly and operates efficiently, giving you complete confidence in your hot water supply.

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Andy Newton
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About a week ago, 2 young engineers turned up on time and instantly made a great impression. Great attitude, professional, well-mannered, and a fantastic approach to work. Much better than mine was at their age! The installation was flawless from start to finish. I honestly can't fault it, and I am deffo one of those picky annoying pricks who can find fault in anything. Mostly... Whoever trained Kieran did an amazing job. Both Kieran and Leo should be proud of themselves for outstanding workmanship. They played a blinder. Well done boys!
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Carol Weld
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Mark Abraham gas services originally installed my new boiler They have always serviced every year and I have never had any problems with boiler On Tuesday 2/6 their engineer called Charlie came to complete yearly service. What a great guy. Friendly explained the service and answered my questions. Very clean tidy work and paperwork completed. Charlie must be a credit to your company as great customer service Very impressed as always over the years. Thank you. Carol Weld
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Tracey Burton
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Great customer service from start to finish with my boiler replacement. The quotes provided for different models were clear and detailed. Lisa in the office found a very quick slot for the appointment and kept me up to date with timings etc. Boiler replacement was done in less than a day. I hardly knew Kieran was in my home other than the occasional drilling. My kitchen was spotless when he left, and he also made sure he had covered the Hive app and thermostat instructions before he went. Highly professional service from all colleagues at Mark Abraham.
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Jackie Pell
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Seamless annual check of old boiler and boiler replacement, both completed with a week. Polite and professional staff from start to finish. Thankyou, Abraham’s
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linda marks
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I have used Mark Abraham Gas Services for about 15 years. They have replaced boilers in my pub, my house, my partner's house and my mother in law's house. They have continually serviced them each year. Very efficient service, lovely friendly engineers and trusted, genuine prices. I would fully recommend them to anyone.
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J H
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I loved my warm air heating but, at 34 years old, it had to go. Mark came to my home and explained my options. I had the quote later that day and the appointment was made for the following week. The work was completed in three days. Everyone was absolutely brilliant. I was nervous of changing the heating and had been putting it off for years. I can't tell you how relieved I am that it's now done. As you'll see from other reviews, everyone is professional but friendly. No messing about, but very approachable, and nothing is too much trouble. They would let me know what they were doing, and come and talk to me if they came across any issues. A solution was run past me to make sure I was happy before they went ahead. The engineers who worked so hard were Callum, Bradley and Leo. There's just one little thing to sort out, but I'm sure that will be dealt with in the same way as everything else, so I'm not in the least bit worried. Thank you ever so much. It's very rare to find tradespeople with such a culture, and you're all amazing. I'd recommend Mark Abraham Gas Services in a heartbeat! Update 24th April: Just to say that my absolute confidence was not misplaced. All sorted. 😊
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Geoff Rudd
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Great experience from beginning to end. From the first visit from Mark to discuss the options for our new boiler and radiators, to the last day of installation with his team, the service was first class. High quality work to go with the right heating system for our needs. Faultless and professional at all times. I would highly recommend giving them a call.
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Lee Martin
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I cant recommend Mark and his team highly enough for their freindly services and professionalism. From initial contact to completing the job was fast, no fuss and very reasonably priced. Thank you.
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Ian Coleman
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Used Mark Abraham to install a new boiler for us. All staff were very polite, respectful and professional. I would not hesitate to recommend to anyone. Engineer Stefan was very thorough and friendly. Well done Mark Abraham Gas Services for a 5 star job completed.
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Julia Thorpe
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Mark and his staff always provide a prompt, polite and professional service. Prices are fair and competitive. Lisa, in the office, is very helpful and friendly. Customers are treated respectfully and regulars are acknowledged.
30

Over 30 Years’ Experience

Fully Qualified Engineers

Gas Safe & OFTEC Registered

Honest, Reliable & Professional

Emergency Callout Available

Excellent Customer Reviews

Maximise The Productivity and Safety of Your Hot Water System
Unvented Hot Water Cylinder Servicing

Regular servicing helps maximise system performance and extends the lifespan of your unvented hot water cylinder, so it continues operating safely, dependably and productively throughout the year.

We offer and recommend annual and comprehensive servicing. It allows important safety devices to be inspected and tested while identifying any developing faults before they become costly repairs.

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1. Get in Touch

Call us or request a quote online and tell us what you need.

2. We Assess

We visit your property to assess your boiler needs and provide expert advice.

3. We Get to Work

Our engineers carry out the work to the highest standards with minimal disruption.

4. You're Covered

Enjoy reliable heating and complete peace of mind all year round.

Powerful and Reliable Unvented Hot Water Cylinder Performance

Unvented hot water cylinders deliver powerful water pressure, excellent hot water performance and a reliable supply of hot water throughout your home.

At Mark Abraham Gas, we specialise in the installation, servicing, repair and maintenance of unvented hot water cylinders.

Our qualified engineers guarantee every system is installed safely, maintained correctly and operates efficiently, giving you complete confidence in your hot water supply.

Whether you’re upgrading an older cylinder, installing a new system or arranging your annual maintenance, our expertise, quality workmanship and exceptional customer service will help and support you.

Our Service Includes:

  • Visual inspection
  • Expansion vessel checks
  • Thermostat testing
  • Immersion heater inspection
  • Temperature and pressure relief valve testing
  • Pressure reducing valve inspection
  • Pipework inspection
  • Leak inspection
  • General performance testing
  • System safety checks
  • Operational testing
  • Service documentation
Mark Abraham Gas - Unvented Hot Water Cylinder

Unvented Hot Water Cylinder Repairs

Prompt and Precise Repairs for Unvented Cylinders

At Mark Abraham Gas, we thrive on our prompt, professional and precise repairs to restore your hot water supply. We diagnose and identify the cause of hot water cylinder faults quickly, for example: loss of hot water, inadequate performance, leaks or pressure.

Recommending the most appropriate repair solution, we ensure your system is fully tested before returning it to excellent service.

We Repair Problems Including:

  • No hot water
  • Poor water pressure
  • Water leaks
  • Expansion vessel faults
  • Immersion heater failures
  • Thermostat faults
  • Pressure relief valve problems
  • Temperature issues
  • Pipework leaks
  • General system faults

Annual Safety Checks

Protect Your Home with a Professional Annual Safety Inspection

Unvented hot water cylinders differ from domestic hot water systems. They operate under pressure and contain several important safety devices that require regular inspection.

An annual safety check is essential in ensuring these components continue to operate safely and correctly. It importantly reduces the risk of system failure while maintaining optimal and efficient performance.

Our exceptional engineers positively execute comprehensive inspections whilst aligning with current industry recommendations, supplying customers with confidence that their hot water systems remain safe and dependable.

Our Annual Safety Check Includes:

  • Temperature and pressure relief valve testing
  • Expansion vessel inspection
  • Pressure reducing valve testing
  • Thermostat operation checks
  • Safety control inspection
  • Pipework inspection
  • Discharge pipe inspection
  • Leak detection
  • General system condition assessment
  • Performance testing
  • Safety compliance checks
  • Service certification where applicable

Benefits of Annual Safety Checks:

  • Improved efficiency
  • Increased reliability
  • Longer cylinder lifespan
  • Early fault detection
  • Confirms your system is operating safely
  • Tests all critical safety devices
  • Reduces the risk of unexpected failures
  • Helps prevent expensive repairs
  • Provides complete peace of mind for you and your family
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