(19)

(11)

EP 3 423 412 A1

(12)

(43) Date of publication: 09.01.2019 Bulletin 2019/02 (21) Application number: 17715249.3 (22) Date of filing: 02.03.2017

(51) International Patent Classification (IPC):  C02F 1/00(2006.01) C02F 103/00(2006.01) B01D 29/56(2006.01) C02F 1/50(2006.01) B01D 29/01(2006.01) B01D 29/90(2006.01) (86) International application number: PCT/GB2017/050566 (87) International publication number: WO 2017/149314 (08.09.2017 Gazette 2017/36)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 03.03.2016 GB 201603679 (71) Applicant: Avon Water Systems Limited Armadale, Bathgate West Lothian EH48 3QP (GB)	(72) Inventor: HENDRIE, William John Brown Armadale Bathgate West Lothian EH48 3QP (GB) (74) Representative: Hutchison, Craig McGregor  Lawrie IP Limited The Hub Pacific Quay Pacific Drive Glasgow G51 1EA Glasgow G51 1EA (GB)