Presenting one of the slimmest 250 litre unvented hot water cylinder in the market.
The Telford Tempest Slimline 250 Litre Indirect Unvented Hot Water Cylinder (TSMI250SL) is the perfect hot water solution for homes with limited installation space. With its slimline diameter of 510mm, it is designed to fit narrow spaces while delivering exceptional performance and efficiency.

At Getplumb, we guarantee the lowest prices on this premium slimline model, offering exceptional value for your investment.

Built with high-quality Duplex 2304 stainless steel, this cylinder is engineered for durability and excellent corrosion resistance. Designed to work seamlessly with indirect heating systems such as gas or oil boilers, it features rapid recovery times and outstanding energy efficiency, fully compliant with ERP standards.

Key Features:

• Slimline Design: Compact 510mm diameter, ideal for space-restricted installations.
• Capacity: 250 litres, suitable for medium to large households or light commercial use.
• Material: Duplex 2304 stainless steel for superior durability and resistance to corrosion.
• Reheat Time: Rapid recovery in just 35 minutes (from 10°C to 60°C).
• Insulation: High-density polyurethane for minimal heat loss (2.00 kWh/24h).
• Operating Pressure: 3 bar, with a maximum incoming supply pressure of 12 bar.
• Energy Rating: ERP-certified with a "C" energy efficiency classification.
• Fittings: 22mm compression connections for easy installation.
• Safety: Includes a 1/2" 7-bar T&P relief valve, thermostat pocket, and WRAS-approved components.
• Guarantee: Lifetime warranty on the cylinder shell and 2 years on components.
• Supplied with: Acetal tundish, Inlet control group, two port valve, external expansion vessel with bracket, dual probe thermostat.

Specification Table:

The Telford Tempest Slimline 250L is a space-saving, energy-efficient, and durable hot water cylinder, ideal for households looking for premium performance in compact spaces. With Getplumb's lowest prices, you can upgrade your heating system without exceeding your budget.

Order online today or visit our Reading store for collection!

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 £60 & above)

We offer FREE delivery on orders £60 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 0–5 kg, the shipping cost is £2.99 with a delivery time of 2–4 working days.
• For cart weight between 5–25 kg, the shipping cost is £7.99 with a delivery time of 2–4 working days.
• For cart weight between 26–40 kg, the shipping cost is £15.98 with a delivery time of 2–4 working days.
• For cart weight of 41 kg and above, the shipping cost is £31.96 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.