You can write to The Water Calculator at either of the addresses below:

Bathroom Manufacturers Association
Innovation Centre 5
Keele Science & Business Park
Innovation Way
Newcastle-under-Lyme
ST5 5NT

Waterwise
180 Piccadilly
London
W1J 9HF

You can email questions and queries to:
info@bathroom-association.org.uk

If you experience difficulties with the operation of this site email:
webmaster@bathroom-association.org.uk