The following notice appears on the B&Q website:
B&Q would like to make customers aware that the below products are not compatible with electric showers. When installed to an electric shower, use of the flow restriction feature may result in scalding water building up in the shower carrying a risk of burns.
Use with mixer showers does not present this risk. The products have been on sale since April 2017.
Humberto white shower head EAN: 3663602949862
Humberto chrome shower head EAN: 3663602949879
If you have one of these products in use with an electric shower, please stop using the flow restriction feature immediately and return the product to your local store.
For more information please contact the helpline: UK: 0300 303 4482 / ROI: 1800 946 327*
*Monday to Friday 8.30am to 8.00pm, Saturday 9.00am to 5.00pm and Sunday 10.00am to 4.00pm
B&Q thank you for your cooperation.
Distributor: B&Q plc, B&Q House, Chestnut Avenue, Chandlers Ford, Eastleigh, Hampshire SO53 3LE
Manufacturer: Kingfisher International Product Limited, 3 Sheldon Square, London, W2 6PX, UK