Changes in water pressure elsewhere in your home can sometimes cause shower temperatures to fluctuate. The Mira Advance Flex uses thermostatic technology to continually regulate the water temperature, helping to maintain a safe and comfortable shower even when other taps or appliances are being used.
For additional protection, the maximum showering temperature can be selected during installation. There are four settings between 41°C and 48°C, allowing the shower to be configured to suit the needs of the household.
Designed for Easier, More Accessible Showering
The Mira Advance Flex has been carefully designed to make everyday showering easier for a wide range of users, including people with reduced vision or dexterity.
Large, colour-contrasted controls are easy to identify, while tactile raised areas and audible clicks provide additional feedback when making adjustments. High-contrast visuals make important touchpoints easier to find, and the matt anti-glare fascia helps reduce reflections that could otherwise make the controls difficult to see.
Flexible Showerhead Positioning
The Advance Flex provides additional flexibility when positioning the showerhead, making it particularly useful in accessible bathrooms or for anyone who prefers to shower while seated.
The showerhead can be repositioned easily using one hand, while a secondary showerhead position provides another convenient location when required.
110mm Showerhead with Three Spray Modes
The generous 110mm showerhead offers three different spray patterns, allowing you to select the setting that feels most comfortable.
Keeping it clean is straightforward too. The removable spray plate and rub-clean nozzles make it easy to wipe away limescale and keep the showerhead performing effectively.
Mira Clearscale™ Technology
Limescale can build up inside an electric shower over time, particularly in hard water areas, potentially reducing its performance and shortening its working life.
Mira Clearscale™ technology helps reduce limescale by up to 50%. The shower uses longer heating elements with larger gaps between the coils to help minimise the hot spots where scale can form.
Combined with the shower's phased shutdown system, this helps protect its internal components and maintain performance for longer.
Mira Opti-Flo Pro™ Technology
Changes in incoming water pressure can affect the performance of an electric shower. Mira's Opti-Flo Pro™ technology helps compensate for these variations, providing consistent showering performance throughout the year.
Together with thermostatic temperature control, this helps deliver a more comfortable and dependable shower.
Phased Shutdown for Added Safety
Once the shower is switched off, the Mira Advance Flex continues to run briefly to flush residual hot water from the heating tank.
This helps ensure excessively hot water isn't left inside the unit for the next user while also helping to reduce limescale build-up.
Cold Mains Water Supply Only
The Mira Advance Flex connects directly to a cold mains water supply and heats the water inside the unit as you shower.
Because it doesn't rely on your boiler or stored hot water, other members of the household using the hot water supply won't leave you waiting for more water to heat up before you can shower.
BEAB Care Approved
The Mira Advance Flex carries the BEAB Care Mark, which identifies products incorporating additional safety and performance features designed with more vulnerable users in mind.
BEAB Care requirements include stable water temperatures and protection against scalding should incoming water conditions change rapidly, making the shower particularly suitable for accessible bathrooms and care environments.
RNIB Tried and Tested
RNIB Tried and Tested accreditation helps blind and partially sighted people identify products that have undergone user testing for accessibility and usability.
The Advance Flex incorporates features such as high-contrast graphics, tactile markings, large controls and audible feedback to make showering easier for users with visual impairments.
10mm Recommended Cable Size
The correct cable size for an electric shower depends on its power rating and the individual installation. This 8.7kW Mira Advance Flex recommends a 10mm cable.
Electrical installation must be carried out in accordance with current wiring regulations and Mira's installation instructions.
Made in the UK
Mira has been designing and manufacturing showering products in the UK for more than 100 years. Its products and components undergo extensive testing to ensure they meet Mira's standards for quality, safety and performance.
2-Year Mira Guarantee
The Mira Advance Flex 8.7kW electric shower is supplied with a 2-year manufacturer's guarantee, providing added reassurance should you experience a problem with your shower.
Mira has more than 100 years of experience developing showers and showering products, with a range covering electric, mixer and digital showers alongside shower enclosures and bathroom taps.
The Advance Flex combines Mira's showering technology with a strong focus on accessibility, giving you thermostatic temperature control, flexible showerhead positioning and easy-to-use visual and tactile controls in one carefully considered electric shower.
Mira Advance Flex 8.7kW Thermostatic Electric Shower - White 1.1785.003Video
Specifications+
Back
Style
Mira Advance Flex 8.7kW Thermostatic Electric Shower - White 1.1785.003 – Style Specifications
Shower Type
Electric Shower
Style
Contemporary
Colour
White
Head Type
Handset
Controller Colour
White
Range
Advance
Installation Type
Exposed
Shape
Round
Unit Colour
White
Features
Mira Advance Flex 8.7kW Thermostatic Electric Shower - White 1.1785.003 – Features Specifications
Outlets
1 Outlet
Mobile App Connectivity
No
Amazon Alexa Connectivity
No
Google Home Connectivity
No
Spray Patterns
3
Temperature Control
Thermostatic
Cool Touch
No
Eco Shower
No
Technical
Mira Advance Flex 8.7kW Thermostatic Electric Shower - White 1.1785.003 – Technical Specifications
Components
Complete Showers
Supply Type
Mains-Pressure Cold Supply
Power
8.7
kW
Water Feed
Wall Fed
Warranty
2
Years
Minimum Maintained Pressure
0.5
Bar
Maximum Maintained Pressure
5
Bar
Minimum Static Pressure
0.5
Bar
Maximum Static Pressure
10
Bar
Outlet Connection
½” BSP
Inlet Fitting Connection
15mm Push-Fit
Energy Rating
A
Water Entry
Right - Rising/Falling/Rear
Cable Entry
Right - Rising/Falling/Rear
Temperature Stability
± 1
°C
Certifications
Mira Advance Flex 8.7kW Thermostatic Electric Shower - White 1.1785.003 – Certifications Specifications
BEAB Approved
Yes
BEAB Care
Yes
RNIB Approved
Yes
TMV2 Approved
No
TMV3 Approved
No
WRAS Approved
Yes
CE Approved
Yes
BSI Kitemark Certification
No
KIWA UK Water Regulation 4
Yes
UKCA Approved
Yes
Water Ranges
Mira Advance Flex 8.7kW Thermostatic Electric Shower - White 1.1785.003 – Water Ranges Specifications
Pre-Set Temperature
41
°C
Dimensions
Mira Advance Flex 8.7kW Thermostatic Electric Shower - White 1.1785.003 – Dimensions Specifications
Mira Advance Flex 8.7kW Thermostatic Electric Shower - White 1.1785.003
Product Code: 1.1785.003
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In Stock
Save
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Was £379.99
£341.00(Inc. VAT)
FREE STANDARD DELIVERY*
*exclusions apply, see here
Order in for delivery on Tuesday - 25/08/2026
from £6.99
Plumbworld
£341.00
Screwfix.com
£379.99
BHL.co.uk
£388.43
Trading Depot
£407.29
Victorian Plumbing
£502.82
AQVA Bathrooms
£548.50
Prices last checked on 21/08/2026
All prices are including VAT and excluding delivery charges
Price Guaranteed For
1 Product Question
Gary Jay asked
Does this connect to whale pumps through Bluetooth
No, the Mira Advance Flex Thermostatic Electric Shower (model 1.1785.003) does not connect to Whale pumps via Bluetooth. If you need that functionality, you’d need the Advance Flex Extra version (model 1.1785.005), which is specifically designed for Bluetooth pairing with compatible Whale drain pumps.
This was a one to one replacement so install was very easy. It's a shower and nice having one the works correctly. Plumbworld was the best price and fast delivery.
5/ 5
John O'Byrne
rated this
5/5
★★★★★
Easy to order, arrived on time and works very well.
5/ 5
Mick Franklin
rated this
5/5
★★★★★
Purchased on behalf of an elderly neighbour after their old Mira shower had reached its end of life after about 10 years!
This unit is neater in appearance and was a "straight" swap for all connections.
Excellent service from Plumbworld and best price online.
5/ 5
Alison Wade
rated this
5/5
★★★★★
Bought as a replacement for an existing Mira Advance Flex - so all pipework entries etc were the same - great product
5/ 5
A clark
rated this
5/5
★★★★★
Very good shower and good price
Good length on shower head rail good for small children
5/ 5
Martin Callaway
rated this
5/5
★★★★★
Bought as a replacement for old Mira shower, Plumbworld were best price and with very speedy delivery. Old shower replaced with new in less than an hour, brilliant.
5/ 5
Paul Dove
rated this
5/5
★★★★★
Excellent Service from PlumbWorld. Purchased a Mira Advance flex shower. Quality Product. Best price by far anywhere. None of the other trade suppliers where anywhere close. Price great. Delivery excellent, Communication and after service follow up were really good. Very impressed. First time I've used PlumbWorld, in future it will be the first site I check. Highly recommended.
5/ 5
Paul Bricknell
rated this
5/5
★★★★★
Prefect as ordered good price and very prompt service
5/ 5
Paul Bricknell
rated this
5/5
★★★★★
Prefect as ordered good price and very prompt service
5/ 5
Paula
rated this
5/5
★★★★★
Excellent website and service, cheapest on the market too
5/ 5
D Bailey
rated this
5/5
★★★★★
Couldn't find this available for immediate dispatch anywhere else
These guys had it and at one of the best prices
The shower unit itself is super easy to fit as a replacement for the previous version. only one let down is i prefer the previous shower head spray to this new one.
5/ 5
Paul Bennett
rated this
5/5
★★★★★
Very good shower good price and quick delivery would use this company again