JAB DUC 2 125L Direct Slim Unvented Cylinder
The JAB DUC 2 125L Direct Slim Unvented Cylinder is a space-saving hot water storage solution designed for modern living. Compact in design yet generous in capacity, it's the perfect choice for homes and flats that need reliable mains-pressure hot water but have limited installation space.
With direct electric heating and robust construction, it delivers performance, efficiency, and convenience in a single, compact package.
Designed with installation in mind, allowing most existing airing cupboards to be used. The ideal choice for the replacement of standard copper cylinders.
Applications
- Small homes or apartments needing a bit more capacity
- Typical Use: 2-3 people, 1 bathroom + occasional extra use (kitchen/utility)
- Apartments or flats where space is limited but mains-pressure hot water is needed
- Properties without a central heating system (all electric homes)
- Backup or supplementary hot water storage alongside other systems.
Key Features & Benefits
- 125-Litre Capacity - Suited to small to medium homes with moderate hot water demand
- Slimline Design - Narrow profile makes it ideal for installation in tight spaces such as cupboards or utility areas.
- Direct Heating - Fitted with an immersion heater to heat the stored water directly, making it independent of a boiler
- Unvented System - Provides mains-pressure hot water for improved flow rates at taps and showers
- High-quality construction - Made from corrosion-resistant materials for durability and long service life.
- Efficient Insulation - factory-applied foam insulation reduces heat loss and energy use
- Safe and Reliable - Built-in safety controls, thermostatic regulation, and pressure relief for peace of mind
- Low maintenance - Simple design with minimal upkeep requirements
How it works
Being a direct cylinder, the JAB DUC 2 125L uses an immersion heater to heat the water stored inside. Connected to the mains supply, it delivers pressurised hot water directly to taps and showers without the need for a cold water tank. This makes it an excellent choice for properties without central heating boiler or where additional hot water storage is required.
The unvented design means water is supplied at mains pressure, offering a more powerful flow compared to traditional vented cylinders.
Specifications
| Product Code | JD2125DSLIM |
| Nominal Capacity (L) | 125 |
| Height (mm) | 1050 |
| Diameter Ø (mm) | 470 |
| Reheat From Cold (mins) | 72 |
| Reheat from 70% Draw-off (mins) | 37 |
| ERP band | C |
| Immersions Rating (kW) | 2 x 3 |
| Standing Heat Loss (kWh/24hrs) | 1.48 |
All direct units are supplied with:
- 2 x 3kw 240v s/p Immersion Heaters
- 1- Expansion Vessel
- 1 x T & P Relief Valve
- 1 x 3 bar Inlet Chain
* Please note, the image is for visual purposes only and may be slightly different
Specifications
| Product Ref | HWS |
|---|---|
| Volume (litres) | 125 |
| Diameter (mm) | 470 |
| Height (mm) | 1,050 |
Delivery Terms
The delivery of a tank can be confusing as each manufacturer offers a slightly different service and lead time. Please refer to our Delivery Information page. Standard tank deliveries are "kerbside", which means the tank will be delivered to the kerb only and not positioned further. Should you have specific delivery requirements or restrictions, please contact us to discuss.
Tanks over 2,500L — articulated lorry, customer offload
These tanks are delivered on an articulated vehicle (approximately 16.5m long × 2.6m wide × 3m high) which has no offloading on board. It is the customer's responsibility to offload the tank, which may require a telehandler or forklift.
Curtain-sided vehicles are also used, so please note that if there are obstacles or overhanging branches on the road to the delivery site, the driver may refuse to drive to the location due to the risk of damaging the vehicle. Please let us know about any obstructions before delivery so we can arrange alternative transport.
18-tonne tail-lift HGV
This vehicle is roughly the size of the largest bin lorries — approximately 8.2m long × 2.6m wide × 4m high, and often curtain-sided. If there are overhanging branches, these vehicles will not attempt the route, so a smaller vehicle should be requested.
Tanks are lowered to the ground but not positioned, as this is a kerbside delivery. If a smaller vehicle is required, email sales@fueltankshop.co.uk quoting your order number and name.
HIAB delivery
HIAB delivery is available but must be requested, and carries an additional cost. Email sales@fueltankshop.co.uk quoting your order number and name, and we'll come back to you with a price.
Accessories
Most accessories are delivered within 1–3 working days. Certain products and postcodes may take longer — check the product page for current information. If you need them sooner we can sometimes offer a next-day service; please contact us to discuss. If an item is out of stock we'll advise the expected lead time, and you're free to cancel for a full refund.
Returns Information
Customers may return items within 14 calendar days, as set out in section 7 of our Terms & Conditions.
All items must be returned unused. Refunds cannot be issued for used or previously installed items.
Please be aware that returning a tank can be complicated and expensive, so do check you're ordering the correct item — we strongly suggest checking the dimensions carefully before you buy.
How to return an item
- Complete the form on our returns page with details of your order.
- Once your request is approved, we'll issue a Returns Authorisation Number (RAN) along with instructions on how and where to return your order, and any costs involved.
- Please do not return any goods without this authorisation. Goods cannot be accepted without a valid RAN.
- Returns are not accepted at our Minehead office. Please wait until we contact you before returning anything.
Downloadable Documents
Talk to a specialist.
Sizing, regulations, installation. Our team has been answering these questions since 2011.
- Choosing a selection results in a full page refresh.
- Opens in a new window.