(19)

(11)

EP 4 739 414 A1

(12)

(43) Date of publication: 13.05.2026 Bulletin 2026/20 (21) Application number: 24743457.4 (22) Date of filing: 05.07.2024

(51) International Patent Classification (IPC):  B01D 3/00(2006.01) F28D 3/04(2006.01) F28F 9/02(2006.01) F25B 39/02(2006.01) F28D 5/02(2006.01) F28F 25/04(2006.01) (52) Cooperative Patent Classification (CPC): F25B 39/028; B01D 3/008; F28D 5/02; F28F 25/04; F28D 3/04; F28D 2021/0071 (86) International application number: PCT/GB2024/051756 (87) International publication number: WO 2025/008639 (09.01.2025 Gazette 2025/02)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 05.07.2023 GB 202310277 (71) Applicant: LAT Water Limited Thatcham Berkshire RG19 4EP (GB)	(72) Inventors: SINGH, Nityalendra Thatcham Berkshire RG19 4EP (GB) HARVEY, Andrew Thatcham Berkshire RG19 4EP (GB) (74) Representative: Hancox, Jonathan Christopher et al Venner Shipley LLP Windsor House 6-10 Mount Ephraim Road Tunbridge Wells, Kent TN1 1EE Tunbridge Wells, Kent TN1 1EE (GB)