The Joule Invacyl Unvented 150L Direct Cylinder (TRBMVD-0150LFB) is a high-performance stainless-steel hot water cylinder designed for reliable domestic hot water storage in unvented mains-pressure systems. With a 150-litre actual capacity and two 3kW immersion positions, it provides flexible direct electric heating for consistent hot water across residential and light-commercial applications.
Built with an LDX 2101 stainless-steel cylinder, coated mild-steel outer casing and 50mm dense PU foam insulation, the Joule Invacyl 150L combines durable construction with efficient heat retention. Its low specified heat loss of 1.63 kWh/24h, 10 bar maximum mains pressure and 25-year warranty make it a practical solution for new-build, renovation and retrofit projects.
150L Direct Cylinder
LDX 2101 Stainless Steel
2 Immersion Positions
3kW @ 230V
10 Bar Max Mains Pressure
25 Year Warranty
Key Highlights
6kW
Potential Total Immersion Output
Applications & Suitability
- Residential homes requiring mains-pressure hot water storage.
- Family-sized households requiring 150 litres of stored hot water.
- Renovation and retrofit projects replacing older hot water cylinder systems.
- Commercial buildings and small offices requiring dependable hot water storage.
- Kitchens and bathrooms where multiple hot-water outlets may be used.
- Properties requiring a durable cylinder with efficient thermal insulation and low heat loss.
Explore the wider GetPlumb Hot Water Storage range for more hot water cylinder options.
Key Specifications
| Product Model |
TRBMVD-0150LFB |
| Actual Capacity |
150 litres |
| Unit Weight Empty |
33 kg |
| Unit Weight Full |
183 kg |
| Cylinder Material |
LDX 2101 Stainless Steel |
| Outer Casing |
Coated Mild Steel |
| Thermal Insulation |
Dense PU Foam |
| Foam Thickness |
50 mm |
| Number of Immersions |
2 |
| Immersion Specification |
3 kW @ 230 V per immersion |
| Maximum Mains Water Pressure |
10 bar |
| Operating Pressure |
7 bar |
| Safety Temperature |
90°C |
| Heat Loss |
1.63 kWh/24h |
| Tested To |
BS EN 50440:2015 |
| Warranty |
25 Years |
150L Direct Unvented Hot Water Storage
The Joule Invacyl Unvented 150L Direct Cylinder provides 150 litres of actual hot water storage for unvented mains-pressure systems. Its direct configuration uses electric immersion heating, making it suitable for installations requiring direct electric hot water heating.
With a maximum mains water pressure of 10 bar and an operating pressure of 7 bar, the cylinder is designed for reliable mains-pressure hot water storage across domestic and suitable light-commercial applications.
Dual Immersion Heating Flexibility
The cylinder features two immersion positions, with each immersion specified at 3kW @ 230V. This provides flexibility when configuring direct electric heating or additional electric heating support.
Immersion Position 1
3 kW
230 V
Direct electric heating position
Immersion Position 2
3 kW
230 V
Additional heating flexibility
LDX 2101 Stainless-Steel Construction
The Joule Invacyl 150L uses an LDX 2101 stainless-steel cylinder with a coated mild-steel outer casing. This combination provides a robust construction for long-term hot water storage while maintaining a practical outer finish.
The cylinder weighs 33kg when empty and 183kg when full, useful information when planning handling and installation requirements.
50mm Dense PU Foam Insulation
The cylinder incorporates dense PU foam thermal insulation with a specified thickness of 50mm. This insulation helps retain stored hot water temperature and contributes to the product's specified low heat loss of 1.63 kWh/24h.
Pressure, Safety & Standards
The Joule Invacyl 150L has a maximum mains water pressure of 10 bar, an operating pressure of 7 bar and a safety temperature of 90°C. The cylinder is tested to BS EN 50440:2015.
- Maximum mains water pressure: 10 bar
- Operating pressure: 7 bar
- Safety temperature: 90°C
- Tested to: BS EN 50440:2015
Ideal For
- Family-sized residential properties requiring 150 litres of hot water storage.
- Homes requiring mains-pressure hot water for showers, taps and appliances.
- Renovation and retrofit projects requiring an unvented cylinder solution.
- Small offices and suitable light-commercial installations.
- Kitchens and bathrooms where multiple hot-water outlets may be used.
- Properties prioritising durable stainless-steel construction and efficient heat retention.
- Installations requiring two immersion positions for electric heating flexibility.
Compare this cylinder with other options in the GetPlumb Hot Water Storage range.
Frequently Asked Questions
What is the capacity of the Joule Invacyl 150L cylinder?
The cylinder has an actual hot water storage capacity of 150 litres.
How many immersion heaters does the cylinder support?
The Joule Invacyl 150L has two immersion positions, with each immersion specified at 3kW @ 230V.
What is the maximum mains water pressure?
The specified maximum mains water pressure is 10 bar, with an operating pressure of 7 bar.
What material is the Joule Invacyl 150L made from?
The cylinder is manufactured from LDX 2101 stainless steel and has a coated mild-steel outer casing.
What insulation does the Joule Invacyl 150L use?
It uses dense PU foam insulation with a specified thickness of 50mm.
What is the heat loss of the 150L Invacyl cylinder?
The specified heat loss is 1.63 kWh/24h.
What standard has the cylinder been tested to?
The cylinder is tested to BS EN 50440:2015.
What warranty does the Joule Invacyl 150L have?
The supplied product specification states a 25-year warranty.
Joule Invacyl Unvented 150L Direct Cylinder
The Joule Invacyl Unvented 150L Direct Cylinder (TRBMVD-0150LFB) combines 150 litres of hot water storage with two 3kW immersion positions, LDX 2101 stainless-steel construction and 50mm dense PU foam insulation. With 10 bar maximum mains pressure, 1.63 kWh/24h heat loss, BS EN 50440:2015 testing and a 25-year warranty, it provides a durable and flexible solution for domestic and suitable light-commercial unvented hot water systems.
