Product Description

Gledhill Stainless ES 120L Direct Unvented Cylinder – SESINPDR120

DELIVERY NOTICE: We can only deliver this cylinder to Mainland England addresses.

The Gledhill Stainless ES 120L Direct Unvented Cylinder SESINPDR120 provides mains-pressure hot water for flats, smaller homes and properties with moderate hot water demand. Gledhill lists it as a 120-litre model, while its actual stored capacity is approximately 118 litres.

Two 3kW immersion heaters heat the stored water. Therefore, this direct cylinder suits homes that use electricity as their main hot water heat source. It does not contain a boiler-fed heating coil.

Gledhill makes the inner vessel from corrosion-resistant duplex stainless steel. In addition, 40mm insulation helps retain heat and reduce energy loss.

The unvented design connects directly to the incoming mains water supply. As a result, it can deliver strong hot water flow to compatible showers, baths and taps. However, the property must have suitable mains pressure and flow.

Installation Guides and Product Information

• Download the latest Gledhill Stainless ES installation manual
• Download the Gledhill Stainless ES brochure
• Read the SNH Tradecentre Gledhill Stainless ES buying guide
• View the Gledhill Stainless ES range

Gledhill ES 120L Direct Cylinder Features

• Direct unvented hot water cylinder
• Product code: SESINPDR120
• Nominal size: 120 litres
• Actual capacity: approximately 118 litres
• Suitable for direct electric hot water systems
• Provides mains-pressure hot water
• Does not require a boiler-fed heating coil
• Corrosion-resistant duplex stainless steel vessel
• 40mm insulation helps reduce heat loss
• Two 3kW immersion heaters
• Normally configured for on-peak and off-peak use
• No cold water storage tank required
• WRAS and NSF WRC independently approved
• ErP energy-efficiency class C
• Heat loss of 43 watts
• 25-year cylinder warranty, subject to Gledhill’s conditions
• Two-year component warranty, subject to Gledhill’s conditions

Technical Specification

• Manufacturer: Gledhill
• Range: Stainless ES
• Product code: SESINPDR120
• Cylinder type: Direct unvented
• Nominal size: 120 litres
• Actual capacity: Approximately 118 litres
• Heat source: Electric immersion heaters
• Immersion heaters: 2 x 3kW, 240V AC
• Inner vessel: Duplex stainless steel
• Insulation: 40mm
• ErP rating: C
• Load profile: L
• Heat loss: 43W
• Daily standing heat loss: Approximately 1.03kWh per 24 hours
• V40 mixed-water volume: Approximately 153.6 litres
• Maximum inlet pressure to pressure-reducing valve: 12 bar
• Operating pressure: 3 bar
• Expansion-vessel charge pressure: 3 bar
• Expansion-relief valve setting: 4.5 bar
• Pressure and temperature relief valve: 6 bar
• Expansion-vessel capacity: 12 litres
• Empty weight: Approximately 19kg
• Full weight: Approximately 137kg
• Cylinder warranty: 25 years, subject to Gledhill’s terms
• Component warranty: Two years, subject to Gledhill’s terms

Gledhill ES 120L Cylinder Dimensions

• Overall height: 832mm
• Overall diameter: 530mm
• Recommended minimum cupboard footprint: Approximately 650mm square

Before ordering, check the space needed for the cylinder, expansion vessel, valves and connected pipework. Furthermore, allow enough room for safe installation and future maintenance.

The supporting floor or base must remain level and support the cylinder’s full operating weight. The full cylinder weighs approximately 137kg before allowing for associated pipework and controls.

What Comes with the Cylinder?

• 1 x Gledhill Stainless ES 120L direct unvented cylinder
• 2 x 3kW immersion heaters with thermostatic controls
• 1 x 12-litre potable expansion vessel
• 1 x expansion-vessel wall bracket
• 1 x combination inlet control group
• 1 x factory-fitted temperature and pressure relief valve
• 1 x tundish
• Technical and user information

The combination inlet group incorporates a pressure-reducing valve, strainer, check valve, balanced cold-water take-off, expansion-relief valve and expansion-vessel connection point.

The installation may also need extra pipework, valves and fittings to suit the property. For example, Gledhill does not supply a separate drain valve. Therefore, the installer may need to fit one close to the cylinder’s cold inlet.

Manufacturers can update package contents without notice. Consequently, check the latest manual and supplied parts before installation.

How Does a Direct Unvented Cylinder Work?

A direct cylinder uses electric immersion heaters to heat its stored water. The SESINPDR120 includes an upper and lower 3kW immersion heater. Installers normally configure one for on-peak use and the other for off-peak heating.

This model does not contain a primary heating coil. Therefore, it does not rely on a gas or oil boiler to heat the water.

Meanwhile, the unvented design takes cold water directly from the mains. When someone opens a hot tap, incoming mains water pushes the heated water towards the outlet. As a result, the system does not require a traditional cold water tank in the loft.

Who May Need a 120L Direct Cylinder?

The Gledhill Stainless ES 120L Direct may suit flats, annexes and smaller homes with moderate hot water needs. It may also provide a practical option for properties without a gas supply or boiler connection.

However, cylinder selection depends on more than the number of bedrooms. Before ordering, consider:

• The number of occupants
• The number of bathrooms and showers
• The size and type of bath
• How often occupants use hot water
• The available mains pressure and flow
• The electrical supply and selected tariff
• The time available to reheat the cylinder

For this reason, ask a qualified installer to calculate the required capacity before placing your order.

Direct or Indirect Cylinder?

Choose a direct cylinder when immersion heaters will provide the main source of hot water. Direct cylinders often suit electric-only homes, flats and properties without a suitable boiler.

In comparison, an indirect cylinder contains a heating coil that connects to a boiler or another compatible heat source. It normally includes an immersion heater for backup use.

Therefore, confirm the property’s heat source before ordering. A direct cylinder cannot always replace an indirect model without changes to the heating system.

Benefits of Mains-Pressure Hot Water

An unvented cylinder can provide strong hot water flow to compatible showers, baths and taps. In addition, removing the need for a loft tank can free valuable storage space.

However, the cylinder cannot improve a weak incoming mains supply. Its performance depends on the pressure and flow available at the property. Therefore, the installer must test the incoming supply before confirming suitability.

Why Choose the Gledhill Stainless ES?

The Gledhill Stainless ES range combines straightforward operation with a competitive price. Its duplex stainless steel vessel offers strong corrosion resistance, while the 40mm insulation helps limit standing heat loss.

In addition, Gledhill supplies the main unvented safety controls with the cylinder. This gives the installer the cylinder, expansion vessel, inlet group and tundish as one coordinated package.

Gledhill manufactures its cylinders in the UK and offers technical support for installers. The range also carries WRAS and NSF WRC independent approvals.

Explore Gledhill Stainless ES Direct Cylinders

The Stainless ES Direct range includes several sizes. Therefore, you can select a model that suits the available space and expected hot water demand.

• Gledhill Stainless ES 90L Direct – SESINPDR090
• Gledhill Stainless ES 120L Direct – SESINPDR120
• Gledhill Stainless ES 150L Direct – SESINPDR150
• Gledhill Stainless ES 170L Direct – SESINPDR170
• Gledhill Stainless ES 200L Direct – SESINPDR200
• Gledhill Stainless ES 250L Direct – SESINPDR250

Read our Gledhill Stainless ES cylinder buying guide or contact SNH Tradecentre if you need help comparing models.

Delivery Information

We can only deliver this cylinder to Mainland England addresses.

The cylinder normally comes directly from the manufacturer. Therefore, delivery times can depend on current stock and the manufacturer’s delivery schedule.

Please provide a working telephone number and check access for the delivery vehicle. Also, inspect the cylinder promptly after delivery and report any visible damage within the stated claim period.

Installation Requirements

A suitably trained and qualified installer must fit and commission this unvented cylinder. In England and Wales, the installation must comply with Part G3 of the Building Regulations.

The installer must also follow the latest Gledhill manual. This includes the requirements for the inlet controls, expansion vessel, tundish, safety valves and discharge pipework.

Electrical work must comply with current wiring regulations. Each 3kW immersion heater also needs the correct electrical protection and isolation.

Gledhill Warranty

Gledhill provides a 25-year warranty on qualifying unvented cylinder vessels and a two-year warranty on components. All warranty cover remains subject to the manufacturer’s full terms and conditions.

To qualify for the full warranty, register the cylinder with Gledhill within 30 days of installation. Keep the purchase invoice, commissioning information and installer details for future reference.

Frequently Asked Questions

Is the SESINPDR120 a direct or indirect cylinder?

The SESINPDR120 is a direct unvented cylinder. Two 3kW immersion heaters heat the stored water. It does not contain a boiler-fed heating coil.

What is the actual capacity?

Gledhill markets this product as a 120-litre cylinder. Its actual stored capacity is approximately 118 litres.

How large is the cylinder?

The cylinder measures approximately 832mm high and 530mm in diameter. You must also allow room for the expansion vessel, valves and pipework.

Does it include two immersion heaters?

Yes. The 120-litre direct model includes two 3kW immersion heaters. Installers normally configure these for on-peak and off-peak operation.

Does it need a cold water tank in the loft?

No. The cylinder takes its cold water supply directly from the mains. Therefore, it does not need a traditional loft storage tank.

Can it provide mains-pressure hot water?

Yes, provided that the property has suitable incoming water pressure and flow. An installer should test the mains supply before confirming suitability.

Does it connect to a boiler?

No. This direct model uses electricity to heat the water. Choose an indirect cylinder if a boiler will supply the main source of heat.

What safety components come with it?

The package includes a combination inlet group, expansion vessel, temperature and pressure relief valve and tundish. Additional installation materials may still be required.

Who can install this cylinder?

A qualified installer with recognised unvented hot water competence must complete the installation and commissioning.

Where can SNH Tradecentre deliver it?

We can deliver this cylinder to Mainland England addresses only. Contact us before ordering if you would like us to check your postcode.

Why Buy from SNH Tradecentre?

• Competitive prices: We aim to offer excellent value across the Gledhill Stainless ES range.
• Helpful product advice: Our experienced team can help you compare cylinder sizes and types.
• Genuine Gledhill products: Buy confidently from an established plumbing and heating merchant.
• Mainland England delivery: We arrange direct delivery to eligible addresses.
• Clear technical information: Our guides and specifications help you order the correct cylinder.
• Trade and public sales: We supply homeowners, landlords and professional installers.
• Kent trade counter: SNH Tradecentre is based in Birchington, Kent.

Order the Gledhill ES 120L Direct Cylinder

Choose the Gledhill Stainless ES 120L Direct Unvented Cylinder SESINPDR120 for electric water heating and mains-pressure performance. Its duplex stainless steel vessel, 40mm insulation, two 3kW immersion heaters and supplied controls make it a practical option for smaller properties.

Gledhill may update specifications, package contents and warranty conditions. Always check the latest technical manual and confirm suitability with a qualified installer before ordering.