Gainsborough Slim Mono 8.5kW Electric Shower - White GSM85
18 reviews
ÂŁ69.95(Inc. VAT)
✗
Expected - 16/05/26
FREE DELIVERY
Plumbworld has the lowest price for this product!
Description−
Slim shower unit
It may not be a feature based on style but it's hugely practical if you're short on space. These Gainsborough showers are designed to be ultra-slim, so even in the smallest of enclosures, you should have plenty of room.
On/off button with 3 power settings
Whether you’re eco-conscious or after the invigoration of a lifetime, Gainsborough can cater with its three sublime power settings and easy to use controls. Simply turn your shower on using the on/off button and enjoy.
Flexible installation points
Gainsborough has purpose-designed their Mono showers to be as easy to install as possible. They’ve included 4 different multi-fit options to ensure you can retrofit it over almost any other electric shower. It’s the flexibility that every shower should have.
Rub clean nozzles
Ensure your shower stays looking great thanks to the rub-clean nozzles on the showerhead. It allows you to simply wipe away any limescale build-up without a worry of it reducing the performance of your handset.
Adjustable handset holder
Everyone is a different height so it’s important to be able to customise where your showerhead sits for maximum comfort whilst showering. Not only can you do this with this Gainsborough shower but you can also adjust the wall fixings so the riser rail can be fitted almost anywhere on the wall. You’ll also be pleased to hear that the stainless-steel hose supplied won’t kink or twist as your old shower hose did.
Technical information:
Pressure stabilised temperature control alters the outlet temperature by increasing or reducing the flow rate of water through the shower.
IPX4 rated
Gainsborough Slim Mono 8.5kW Electric Shower - White GSM85Video
Gainsborough Slim Mono 8.5kW Electric Shower - White GSM85 – Style Specifications
Shower Type
Electric Shower
Style
Contemporary
Colour
White
Head Type
Handset
Range
Slim Mono
Installation Type
Exposed
Shape
Round
Features
Gainsborough Slim Mono 8.5kW Electric Shower - White GSM85 – Features Specifications
Outlets
1 Outlet
Mobile App Connectivity
No
Amazon Alexa Connectivity
No
Google Home Connectivity
No
Spray Patterns
1
Temperature Control
Pressure Stabilised
Cool Touch
No
Eco Shower
No
Technical
Gainsborough Slim Mono 8.5kW Electric Shower - White GSM85 – Technical Specifications
Components
Complete Showers
Supply Type
Suitable For All Systems
Low Pressure Suitable
No
Combi Boiler Suitable
Yes
High Pressure Suitable
Yes
Power
8.5
kW
Water Feed
Wall Fed
Guarantee
5
Years
Minimum Maintained Pressure
1
Bar
Handset Flow Rates
Gainsborough Slim Mono 8.5kW Electric Shower - White GSM85 – Handset Flow Rates Specifications
Handset 1.0 Bar
5.7
L/min
Handset 3.0 Bar
9.7
L/min
Handset 5.0 Bar
9.1
L/min
Dimensions
Gainsborough Slim Mono 8.5kW Electric Shower - White GSM85 – Dimensions Specifications
Largest Shower Head Width
96
mm
Gainsborough Slim Mono 8.5kW Electric Shower - White GSM85
Product Code: GSM85
Product Options:
8.5kW: 6mm² cable size for ≤18m run. 10mm² cable size for 18-35m run.
9.0kW: 10mm² cable size.
9.5kW: 10mm² cable size.
9.7kW: 10mm² cable size.
10.5kW: 10mm² cable size.
For runs longer than 35m, a qualified electrician should assess voltage drop and possibly use 16mm² cable.
8.5
9.5
✗
Expected - 16/05/26
ÂŁ69.95(Inc. VAT)
FREE STANDARD DELIVERY*
*exclusions apply, see here
Plumbworld
£69.95
Buyaparcel.com
£75.47
JT Atkinson Builders Merchant
£76.07
Tucker French
£77.86
B&Q
£79.99
Trading Depot
£91.45
Prices last checked on 30/04/2026
All prices are including VAT and excluding delivery charges
Price Guaranteed For
1 Product Question
Phill asked
Hi can this unit be fitted without alterations to the pluming and electrical supply when replacing when used as a replacement for the Gainsborough se8.5 unit Thanks
The electrical and water connections for this shower are on the right hand side of the unit.
Bought this to replace my Gainsborough 8.5 Stanza shower. It's good value for money
5/ 5
Adrian gregory
rated this
5/5
★★★★★
I am glad i purchased this shower from plumb world,
It is alot better than my old shower that cost three times as much as the gainsborough model.
Plumb world are a plesure to deal with thank you very much.
5/ 5
Andy
rated this
5/5
★★★★★
The shower that I have been using has been discontinued and this was the alternative. Ordered and delivered the next day. Great price and would use Plumbworld again
5/ 5
christine barker
rated this
5/5
★★★★★
Really happy with this electric shower, excellent value for money and certainly puts my old original one in the shade.
5/ 5
Andy Eastwell
rated this
5/5
★★★★★
Very competitive againstt other sellers. Easy to order on line and quick delivery. Thank you.
5/ 5
Andrew Kyriakou
rated this
5/5
★★★★★
Great item highly recommend this item thank you plumbing world
5/ 5
Mr. DAVID REED
rated this
5/5
★★★★★
Good value, super service. The shower was easy to install.
5/ 5
Jim Powley
rated this
5/5
★★★★★
Excellent service and very fast delivery
Thanks
Jim
1/ 5
Dave Conlin
rated this
1/5
★☆☆☆☆
Installed by an Engineer. We followed all the rules - switching off at the mains after use etc. Worked 5 times then turned itself into a COLD WATER shower. I guess the heating unit has blown.
5/ 5
David
rated another option
5/5
★★★★★
excellent unit and price with super fast delivery!
