(19)

(11)

EP 0 877 889 A1

(12)

(43) Date of publication: 18.11.1998 Bulletin 1998/47 (21) Application number: 97904675.0 (22) Date of filing: 10.02.1997

(51) International Patent Classification (IPC):  F16L 37/ 18( . ) (86) International application number: PCT/NZ1997/000013 (87) International publication number: WO 1997/029313 (14.08.1997 Gazette 1997/35)

(84) Designated Contracting States: GB IT NL (30) Priority: 08.02.1996 NZ 19960280955 (71) Applicant: McKenzie, Warwick Andrew Glen Eden, Auckland (NZ)	(72) Inventor: McKenzie, Warwick Andrew Glen Eden, Auckland (NZ) (74) Representative: Johnson, Terence Leslie  Edward Evans & Co. Chancery House 53-64 Chancery Lane London WC2A 1SD London WC2A 1SD (GB)