Stuart Turner - Aquastor SAS 400 SIGMA Unvented Indirect Hot Water Cylinder - 400 Ltr

Name: Stuart Turner - Aquastor SAS 400 SIGMA Unvented Indirect Hot Water Cylinder - 400 Ltr
Brand: Stuart Turner
SKU: 44856
Price: 2543.58 GBP
Availability: InStock

Part Number:

44856

Unvented Cylinder - Indirect The Aquastor Sigma range of unvented indirect hot water cylinders are optimal for elevated demand applications and offer an all Stainless Steel construction to the highest standards, with a maximum operating pressure of 4.5 bar..

View Description | Data Sheet(s)

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£3,913.20 RRP £2,543.58 £2,119.65

Free Standard Delivery

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Description

Unvented Cylinder - Indirect

The Aquastor Sigma range of unvented indirect hot water cylinders are optimal for elevated demand applications and offer an all Stainless Steel construction to the highest standards, with a maximum operating pressure of 4.5 bar..
The Sigma range has been designed with higher demand flow rates in mind and features 1 " BSP connections.
Available in a range of cylinder sizes with an ErP B classification.
1 " hot and cold water connections
½" temperature and pressure relief valve
4.5 bar. maximum operating pressure
3 KW immersion heater
22 mm high-performance heating coil

Key Product Features

Unvented 400 Ltr indirect cylinder with external expansion

27.0 KW high performance finned coil

Duplex Stainless Steel inner cylinder

Minimal heat loss

3 KW immersion heater with thermostat and cut-out

Inlet diffuser

High flow rates

Balanced hot and cold water

Factory fitted with 7 bar./90 °C pressure and temperature relief valve

Approvals: BBA, CE, KIWA, ISO, WRC

Internal cylinder 25 years warranty, all other components 2 years

Stuart Turner (est. 1906) is a UK manufacturer of water boosting and pressurisation systems. Their ranges include shower pumps, whole-house boosting sets and mains-pressure solutions. Typical applications are improving water pressure and flow in homes and light commercial buildings.

More Information
Price	£2,119.65
Manufacturer	Stuart Turner
Warranty	1 year guarantee
Dimensions	Height: 1640mm \| Width: 755mm \| Depth: 755mm
Electrical supply	230V
AC Power	Single Phase
Capacity	400Ltr
Water type	Clean or Discoloured
Duty Type	Domestic
Pump Type Filter	Hot Water Cylinder
Approvals	WRAS Approved, CE, BBA, KIWA, ISO, WRC
Inner Cylinder Material	Duplex Stainless Steel
Outer Casing Material	P200 Plastimol
Weight FIlled	468kg
Next Day Delivery	No
Manufacturers Part Number	44856

Data Sheet(s)

Delivery & Returns

Delivery and returns

At Pumpify, we make getting the right pump quick and straightforward.

We offer free standard delivery (2–3 working days) to mainland UK* on all pumps, spares, and accessories over £50 (ex VAT). Orders under £50 are sent on the same service for just £6.95.

Need it faster? No problem. Pumpify offers a range of next working day* delivery options, so you can choose the speed that suits the job. Just be sure to place your order before 3:30pm, Monday to Friday.

*Excludes UK Islands, Northern Ireland and Scottish Highlands.

UK Delivery Options (Orders Over £50)		UK Delivery Options (Orders Under £50)
Standard (2–3 working days)	FREE	Standard (2–3 working days)	£6.95
Next Working Day	£14.50	Next Working Day	£16.45
Next Working Day before 12:00pm	£25.00	Next Working Day before 12:00pm	£25.00
Next Working Day before 9:00am	£50.00	Next Working Day before 9:00am	£50.00
Scottish Highlands Standard	£17.50	Scottish Highlands Standard	£17.50
UK Islands & N. Ireland Standard	£60.00	UK Islands & N. Ireland Standard	£60.00

Republic of Ireland Deliveries

We can arrange delivery to the Republic of Ireland on request.
Due to additional post-Brexit requirements, these orders need to be placed directly with our customer support team:

0808 281 5795

Courier Companies

FedEx handles most small to medium parcels

Palletforce and other trusted pallet couriers are used for larger or heavier items

We always choose the most reliable option for your order.

Next Working Day Delivery

When a pump goes down, waiting isn’t an option. That’s why Pumpify offers Next Working Day Delivery on a wide range of pumps, spares, and accessories, to help keep your projects moving.

While we do everything we can to meet next-day delivery times, availability may occasionally change due to stock levels, transport schedules, or processing constraints. If this happens, the option may be removed at checkout or adjusted after ordering.

If anything changes, we’ll keep you informed and make sure your order reaches you as quickly as possible.