Joule Invacyl Standard In-Direct Unvented Cylinder 250 Litre - Stainless Steel
Free Local Shipping
Free Local Shipping on orders over £100. Standard delivery to most UK postcodes within 2-3 working days. Express options available at checkout.
Contact Us
Give Us A Call +44 118 958 8882 Our team is here to help. We will provide expert advice on specifications, compatibility, and delivery
30-day Easy Return
30 days Easy Return — no questions asked. If you're not completely satisfied, send it back within 30 days for a full refund.
Description
The Joule Invacyl Standard In-Direct Unvented Cylinder 250 Litre is a stainless-steel, unvented hot water storage cylinder designed for mains-pressure systems. It stores ~245 L of hot water and heats indirectly via a stainless-steel coil, delivering reliable, high-pressure hot water for domestic or light commercial use. Suited to utility rooms, plant rooms and larger residences, it offers low heat loss and long-term durability backed by an extended warranty.
Key Features
- Actual capacity: 245.3 L for substantial hot-water availability.
- Durable construction: LDX 2101 stainless-steel cylinder with coated mild steel outer casing.
- Indirect heating coil: 316L stainless-steel coil rated 14.97 kW with 0.79 m² surface area.
- High insulation: Dense PU foam for efficient heat retention and low heat loss (1.752 kW/24h).
- Mains-pressure operation: Max mains water pressure 10 bar; operating pressure 7 bar for strong delivery.
- Immersion-ready: 3 kW @ 230 V immersion specification.
- Safety & compliance: Tested to BS EN 12897:2016; safety valve temp 90 °C.
- Low primary resistance: Coil resistance 0.2 bar and max primary pressure 6 bar for efficient flow.
- Warranty: 25-year warranty for long-term reliability.
Ideal Use Cases
- Family homes and larger residences with high hot-water demand.
- Light commercial properties needing reliable mains-pressure hot water.
- Heating systems using boilers, heat pumps or solar thermal as primary heat sources.
- Renovation or new-build projects requiring a robust unvented cylinder.
- Utility or plant rooms where durable, low-loss hot water storage is required.
Product Specifications
| Specification | Value |
|---|---|
| Product model | Joule Invacyl Standard In-Direct Unvented Cylinder 250 Litre |
| Actual capacity (Ltr) | 245.3 |
| Max mains water pressure (Bar) | 10 |
| Operating pressure (Bar) | 7 |
| Operating temperature (°C) | 60 |
| Safety valve temperature (°C) | 90 |
| Unit weight empty (kg) | 51 |
| Unit weight full (kg) | 296 |
| Cylinder material | LDX 2101 |
| Outer casing | Coated mild steel |
| Thermal insulation | Dense PU foam |
| Foam thickness | 0 |
| Heat loss (kW/24h) | 1.752 |
| Coil material | 316L stainless steel |
| Coil 1 rating (kW) | 14.97 |
| Coil 1 surface area (m²) | 0.79 |
| Coil 1 max primary pressure (Bar) | 6 |
| Coil 1 resistance (Bar) | 0.2 |
| Immersion spec | 3 kW @ 230 V |
| No immersions | 1 |
| No heat exchangers | 1 |
| Tested to standard | BS EN 12897:2016 |
| Warranty terms (Year) | 25Y |
Shipping Information
At GetPlumb, we strive to provide reliable and cost-effective delivery options to our customers. Please review our shipping policy below.
🆓 Free Local Delivery (Orders £100 & above)
We offer FREE delivery on orders £100 or more
for selected local areas.
Eligible Postcodes Include:
- RG*
- SL*
- OX10*, OX11*, OX49*
- HP1*, HP3*, HP8*, HP9*, HP10*, HP11*, HP12*, HP13*, HP14*
- WD*, HA*, UB*, TW*, KT*
- W1* – W9*
- NW*, SW*
Delivery Time: 2–4 working days
Shipping Cost: £0.00
📦 Standard Shipping (Weight-Based Rates)
For orders that do not qualify for free delivery, standard
shipping rates apply based on total cart weight.
- For cart weight between 0–2 kg, the shipping cost is £4.50 with a delivery time of 2–4 working days.
- For cart weight between 2–24 kg, the shipping cost is £9.99 with a delivery time of 2–4 working days.
- For cart weight between 24 kg and above, the shipping cost is £60 with a delivery time of 2–4 working days.
🧱 Block Salt (Harvey’s) – Unit-Based Shipping
This rate applies only to Harvey’s block salt products.
- £7.99 is charged for every 3 items.
- The charge increases by £7.99 for each additional set of 3 items.
Examples:
- 1–3 items → £7.99
- 4–6 items → £15.98
- 7–9 items → £23.97
Delivery Time: 2–4 working days
📏 Large / Long Items (Length-Based Shipping)
For oversized items where the product length is 1.5 metres or more:
Conditions:
- Product length ≥ 1.5 m
- Cart weight ≤ 40 kg
Shipping Cost: £18.00 (flat rate)
Delivery Time: 2–4 working days
Collection from Store
Customers can also choose to collect their order from our store in
Reading, UK, at no additional charge. For any questions regarding shipping, please contact our support team at online@getplumb.co.uk.
