500L Indirect Telford Tempest Vertical Unvented Cylinder TSMI500

500L Indirect Telford Tempest Vertical Unvented Cylinder – TSMI500

The 500L Telford Tempest TSMI500 is a high-capacity indirect vertical unvented hot water cylinder, designed for large residential properties and commercial applications where a dependable, high-volume hot water supply is essential.

With an impressive 500-litre capacity, the TSMI500 is ideal for properties with multiple bathrooms, high occupancy levels or demanding hot water requirements throughout the day. Manufactured from 2304 Duplex Stainless Steel, it delivers exceptional corrosion resistance, long-term durability and rapid hot water recovery when connected to a traditional boiler. The integrated 3kW immersion heater also provides reliable backup hot water whenever required.

Supplied complete with the expansion vessel and installation kit, the TSMI500 includes everything required for a professional installation.

Key Features

• 500 litre indirect vertical unvented cylinder
• Ideal for large homes and commercial applications
• Manufactured from 2304 Duplex Stainless Steel
• Excellent corrosion resistance for a longer service life
• 3 Bar working pressure
• Pressure tested to 15 Bar
• Relief valve operates at 7 Bar / 90–95°C
• High-performance mains pressure hot water
• Fast hot water recovery
• Suitable for traditional boiler systems
• Complete with expansion vessel and installation kit
• Lifetime cylinder warranty*

Supplied Complete With

• Expansion Vessel
• Expansion Vessel Kit
• Dual High Limit Thermostat
• 3kW Immersion Heater (240V Single Phase)
• Temperature & Pressure Relief Valve
• 3 Bar Inlet Control Group
• Two Port Motorised Valve

Everything required for a standard installation is included.

Why Buy From TDL?

• Kept in stock for fast dispatch
• FREE Delivery (typically 1-2 working days)
• Competitive UK prices
• Expert technical advice before and after your purchase
• Real People. Real Service. For Over 40 Years.

Ideal Applications

The 500L Telford Tempest is well suited to:

• Large luxury homes with multiple bathrooms
• Properties with consistently high hot water demand
• Guest houses and bed & breakfasts
• Small hotels and hospitality venues
• Sports clubs and leisure facilities
• Commercial buildings and office premises
• Light industrial and workplace facilities

Why Choose a 500L Cylinder?

A 500-litre unvented cylinder is the ideal solution where multiple showers, baths and hot water outlets are likely to be used simultaneously. Its large storage capacity helps maintain a reliable supply of mains pressure hot water during peak demand, making it suitable for both residential and commercial environments.

Warranty

• Lifetime warranty on the stainless steel cylinder*
• 2-year warranty on supplied components

The cylinder must be serviced every 12 months by a qualified engineer to maintain the manufacturer's warranty.