(19)

(11)

EP 1 844 259 A1

(12)

(43) Date of publication: 17.10.2007 Bulletin 2007/42 (21) Application number: 06709563.8 (22) Date of filing: 20.01.2006

(51) International Patent Classification (IPC):  F16L 57/00(2006.01) E02B 11/00(2006.01) (86) International application number: PCT/GB2006/000192 (87) International publication number: WO 2006/077415 (27.07.2006 Gazette 2006/30)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 21.01.2005 GB 0501288 (71) Applicant: Forest Drainage Products Limited Gwent NP10 8FY (GB)	(72) Inventors: STEPHENS, Michael Cheltenham, Gloucestershire GL50 1QZ (GB) PRICE, Christopher, Avalon Gloucester GL4 8DD (GB) (74) Representative: Shelley, Mark Raymond et al K R Bryer & Co., 7 Gay Street Bath BA1 2PH Bath BA1 2PH (GB)