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Easy To Use Telford Tempest Slimline 300 Litre Indirect Unvented Hot Water Cylinder 510 Diameter Tsmi300sl In Multiple Colors [Syd0vNeE]

$67.99 $217.99 -69%

The Telford Tempest Slimline 300 Litre Indirect Unvented Hot Water Cylinder (TSMI300SL) offers exceptional hot water capacity in a sleek, space-saving design. With a slim diameter of just 510mm, it’s the perfect solution for homes and properties wher

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The Telford Tempest Slimline 300 Litre Indirect Unvented Hot Water Cylinder (TSMI300SL) offers exceptional hot water capacity in a sleek, space-saving design. With a slim diameter of just 510mm, it’s the perfect solution for homes and properties where space is at a premium but demand for hot water is high.

At Getplumb, we provide the lowest prices on this premium slimline model, ensuring you get outstanding value on a top-tier product.

Engineered from high-quality Duplex 2304 stainless steel, this cylinder is designed for durability and long-lasting performance. It is fully ERP-compliant, energy-efficient, and equipped with rapid heat recovery technology, making it ideal for indirect heating systems such as gas or oil boilers.


Key Features:

  • Slimline Design: Compact 510mm diameter, ideal for installations in tight spaces.
  • Capacity: 300 litres, perfect for larger homes or commercial properties with high water demand.
  • Material: Manufactured from Duplex 2304 stainless steel for superior corrosion resistance and durability.
  • Reheat Time: Quick recovery in approximately 40 minutes (from 10°C to 60°C).
  • Insulation: High-density polyurethane minimizes heat loss to 2.22 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.

Specification Table:

Feature Details
Nominal Capacity 300 Litres
Height 2020 mm
Diameter 510 mm
Empty Weight 61 kg
Full Weight 355 kg
Standing Heat Loss (24h) 2.22 kWh
Reheat Time 40 minutes
Operating Pressure 3 Bar
Max Supply Pressure 12 Bar
Immersion Heater Rating 3kW, 240V
Connections 22mm compression
Safety Features T&P relief valve, thermostat pocket
Energy Efficiency Class C

The Telford Tempest Slimline 300L is the ideal hot water solution for high-demand households or commercial properties, offering exceptional performance in a space-saving design. With Getplumb's lowest prices, you can upgrade your heating system affordably and efficiently.

Order online today or visit our Reading store for collection!

What Our Customers Say

January 13, 2026

Absolutely no complaints!

This product is a fantastic addition to my workflow.

- Terrance H..

January 13, 2026

Absolutely no complaints!

I've put it through its paces and it has performed admirably.

- Bentley N..

January 13, 2026

Absolutely no complaints!

This product is a superb find. It's a reliable workhorse.

- Arian C..

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