Unvented Water Heater Installation, Repairs & Upgrades
Unvented water heaters are a modern, space-saving solution for delivering mains pressure hot water directly to your taps, showers, and appliances. Unlike traditional systems, there’s no need for bulky cold-water storage tanks, giving you consistent flow rates and freeing up valuable loft or storage space. At Bibby Contracting, our G3-qualified electricians and engineers specialise in the installation, servicing, and repair of unvented systems across Liverpool, ensuring every project meets UK Building Regulations and the highest standards of safety.
Whether you’re upgrading an older cylinder, seeking to improve energy efficiency, or require urgent repairs to restore reliable hot water, we provide a fast and professional service tailored to your property. From pressure relief controls and expansion vessels to complete system upgrades, we take care of everything, so you can enjoy powerful showers, lower running costs, and peace of mind knowing your unvented water heater is in expert hands.
Our Services
We provide a full range of unvented water heater services in Liverpool, including:
- New system installations
- Repairs for leaks, faults, or poor performance
- System upgrades to modern, efficient models
- Annual servicing & safety checks
- Expansion vessel & valve inspections
- Pressure relief & discharge pipework checks
- Compliance testing and certification
Servicing & Safety
Regular servicing is crucial to maintain your system’s safety, efficiency, and warranty protection. During an annual inspection, our engineers carry out:
- Pressure relief valve testing
- Expansion vessel checks
- Discharge pipework inspections
- Full system performance assessment
This ensures your unvented water heater remains compliant, efficient, and reliable year after year.
Why Choose an Unvented Water Heater?
Mains pressure hot water for more powerful showers
No need for cold water storage tanks — save space
Consistent flow across multiple taps and outlets
Energy-efficient options available to lower running costs
Reliable, modern systems with long service life
Frequently Asked Questions
How often should my unvented water heater be serviced?
- At least once a year to stay compliant and keep your warranty valid.
Do I need a G3-qualified engineer for unvented heaters?
- Yes. Only G3-certified engineers can legally install, repair, or maintain unvented hot water systems.
What are the signs my system needs repair?
- Leaking, poor hot water pressure, unusual noises, or inconsistent heating.
Can you replace my old cylinder with a modern unvented system?
- Absolutely — we specialise in full system upgrades to efficient, space-saving units.