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11 Years
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Emergency
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Trusted Plumbing & Heating Experts in St Albans
Established in 2015, JM Plumbing Services has built a reputation as a trusted provider of plumbing and heating solutions across Hertfordshire and St. Albans. Our team of GasSafe-registered and NICEIC-qualified engineers combines over 15 years of collective experience with a commitment to reliability and customer satisfaction. We specialise in boiler servicing, emergency repairs, installations, and system upgrades, prioritising safety, efficiency, and transparency.

As Vaillant Advance installers, we offer expert advice and 10-year manufacturer guarantees. Our focus on punctuality, clear communication, and professional standards has earned us a loyal customer base and a 5-star Google rating from 91 reviews. We serve residential clients across West Hertfordshire, including Harpenden, Hemel Hempstead, and Berkhamsted.
Services
Annual Boiler Servicing Boiler Repairs Boiler Installations PowerFlush Services Unvented Hot Water Systems
Details
  • Year established: 2015
Highlights and features
  • GasSafe-registered and NICEIC-qualified engineers ensure safety and compliance
  • Competitive pricing with transparent quotes and no hidden fees
  • 91+ 5-star reviews highlighting prompt, professional service
  • 10-year manufacturer guarantee on Vaillant boiler installations
  • Emergency repairs available 24/7 across West Hertfordshire
Associations and certifications
  • GasSafe Register
  • NICEIC
  • Vaillant Advance Installers
What people say
Prompt and efficient Excellent service Highly recommend Very professional Reliable and honest
Services
Annual Boiler Servicing
Regular boiler servicing ensures safety, efficiency, and warranty compliance. Our GasSafe engineers conduct thorough inspections, clean components, and identify potential issues. Customers receive reminders to maintain valid warranties and prevent carbon monoxide risks.
Boiler Repairs
24/7 boiler repair services restore heating and hot water promptly. Our engineers diagnose faults, replace faulty parts, and ensure systems operate safely. Emergency call-outs prioritise urgent issues like leaks or complete breakdowns across Hertfordshire.
Boiler Installations
Vaillant boiler installations include expert advice on energy-efficient models. We handle full replacements with minimal disruption, offering 10-year guarantees. Upgrades improve efficiency, reduce bills, and comply with safety standards for long-term reliability.
PowerFlush Services
Powerflushing removes sludge and limescale from central heating systems. This service enhances boiler efficiency, reduces breakdown risks, and extends system lifespan. Ideal for properties with cold radiators or noisy pipes caused by debris buildup.
Unvented Hot Water Systems
Upgrade to unvented hot water systems for improved pressure and space savings. NICEIC-qualified engineers install tank-free solutions, eliminating cold water storage. Benefits include consistent shower performance and reduced risk of contamination or leaks.
People
Jack McCormack
Owner & Lead Engineer
With over 15 years' experience, Jack founded JM Plumbing Services in 2015. He specialises in boiler systems and leads emergency call-outs. Jack prioritises customer communication and technical excellence across residential projects.
Jack B
Apprentice Engineer
Jack B joined the team while studying for a Level 3 Plumbing qualification. He assists with installations and repairs, demonstrating rapid skill development. His hands-on approach supports the team's commitment to quality service.
Jo
Office Manager
Jo manages administrative operations, ensuring smooth scheduling and client communication. With over a year in the role, she coordinates appointments and supports the team's organisational efficiency.
Dave
Heating Engineer
Dave brings extensive problem-solving expertise to complex plumbing challenges. His experience covers awkward installations and system diagnostics. He contributes technical knowledge to both residential and commercial projects.
Sean
Heating Engineer
Sean specialises in heating installations and repairs, handling projects from new systems to minor fixes. His customer-focused approach ensures clear explanations and reliable solutions for long-term system performance.
Questions
Are your engineers GasSafe registered?
Yes, all our engineers hold GasSafe registration and NICEIC qualifications for boiler and heating work.
Do you offer emergency boiler repairs?
We provide 24/7 emergency boiler repair services across Hertfordshire and St. Albans.
Can I finance a new boiler?
Yes, we offer financing through Ideal4Finance for boiler installations with manageable monthly payments.
What areas do you cover?
We serve St. Albans, Harpenden, Hemel Hempstead, Berkhamsted, and surrounding West Hertfordshire areas.
Do you provide landlord gas safety certificates?
Yes, we issue Landlord Gas Safety Certificates following annual appliance inspections by GasSafe engineers.
How often should boilers be serviced?
Annual boiler servicing is recommended to maintain warranty validity and ensure safe, efficient operation.