The Joule Invacyl Unvented 180L Direct Cylinder Standard (TRBMVD-0180LFB) is a robust stainless-steel hot water cylinder designed for unvented mains-pressure hot water systems. With 180 litres of actual storage capacity and two immersion positions, it provides a flexible direct electric heating solution for reliable hot water in domestic and light-commercial applications.
Built around an LDX 2101 stainless-steel cylinder with a coated mild-steel outer casing, the Joule Invacyl 180L combines durable construction with dense PU foam insulation. Its 50mm insulation helps reduce standby heat loss, while the two 3kW immersion positions provide flexibility for direct electric heating or backup heating requirements.
180L 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
- Family homes with one or more bathrooms requiring reliable mains-pressure hot water.
- Light-commercial properties and small businesses with moderate hot-water demand.
- Installations requiring direct electric immersion heating.
- Systems requiring electric backup heating flexibility.
- New-build and renovation projects requiring a durable 180L hot water cylinder.
- Utility and plant room installations where low heat loss and long service life are priorities.
Explore the wider GetPlumb Hot Water Storage range for additional hot water cylinder solutions.
Key Specifications
| Product Model |
Joule Invacyl Unvented 180L Direct Cylinder Standard — TRBMVD-0180LFB |
| Actual Capacity |
180 litres |
| Unit Weight Empty |
38 kg |
| Unit Weight Full |
218 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 |
1.82 kWh/24h |
| Tested To |
BS EN 50440:2015 |
| Warranty |
25 Years |
180L Direct Unvented Hot Water Storage
The Joule Invacyl 180L Direct Cylinder provides 180 litres of actual hot water storage for unvented mains-pressure systems. Its direct configuration uses electric immersion heating rather than a separate primary heating coil, making it suitable for installations where direct electric water heating is required.
With a maximum mains water pressure of 10 bar and an operating pressure of 7 bar, the cylinder is designed around mains-pressure hot water storage requirements.
Dual Immersion Heating Flexibility
The cylinder features two immersion positions, with each immersion specified at 3kW @ 230V. This provides installation flexibility for primary or backup electric heating requirements.
Immersion 1
3 kW
230 V
Direct electric heating position
Immersion 2
3 kW
230 V
Additional heating flexibility
LDX 2101 Stainless-Steel Construction
The Joule Invacyl uses an LDX 2101 stainless-steel cylinder combined with a coated mild-steel outer casing. This robust construction is designed for hot water storage applications where durability and long-term use are important considerations.
The unit weighs 38kg when empty and 218kg when full, providing useful weight information for installation planning and handling.
Dense PU Foam Insulation
The cylinder is equipped with dense PU foam thermal insulation with a specified foam thickness of 50mm. The insulation helps reduce standby heat loss, with the product specification giving a heat loss figure of 1.82 kWh/24h.
Pressure, Safety & Standards
The Joule Invacyl 180L 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 homes requiring 180 litres of mains-pressure hot water storage.
- Properties with one or more bathrooms and regular hot-water demand.
- Light-commercial applications and small businesses.
- Direct electric immersion heating installations.
- Systems requiring two immersion positions for heating flexibility.
- New-build and renovation projects requiring a durable stainless-steel cylinder.
- Utility and plant room installations where low standby heat loss is important.
Browse the full GetPlumb Hot Water Storage range for more unvented cylinder and hot water storage options.
Frequently Asked Questions
What is the capacity of the Joule Invacyl 180L Direct Cylinder?
The cylinder has an actual storage capacity of 180 litres.
How many immersion heaters does the cylinder support?
The Joule Invacyl 180L 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 cylinder made from?
The cylinder is manufactured from LDX 2101 stainless steel and has a coated mild-steel outer casing.
What type of insulation does the cylinder have?
It uses dense PU foam insulation with a specified thickness of 50mm.
What is the heat loss of the 180L Invacyl cylinder?
The specified heat loss is 1.82 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 180L have?
The supplied product specification states a 25-year manufacturer warranty.
Joule Invacyl Unvented 180L Direct Cylinder Standard
The Joule Invacyl Unvented 180L Direct Cylinder Standard (TRBMVD-0180LFB) provides 180 litres of mains-pressure 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, 1.82 kWh/24h heat loss, BS EN 50440:2015 testing and a 25-year warranty, it is a flexible direct unvented cylinder solution for domestic and light-commercial applications.
