(19)

(11)

EP 0 918 966 A1

(12)

(43) Date of publication: 02.06.1999 Bulletin 1999/22 (21) Application number: 97934391.0 (22) Date of filing: 19.08.1997

(51) International Patent Classification (IPC):  F16K 17/ 04( . ) F16K 17/ 30( . ) G05D 16/ 10( . ) F16K 17/ 06( . ) F16K 37/ 00( . ) (86) International application number: PCT/AU1997/000526 (87) International publication number: WO 1998/008012 (26.02.1998 Gazette 1998/08)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 19.08.1996 AU 1996PO01724 20.01.1997 AU 1997PO04708 (71) Applicants: Australian Water Products Pty. Ltd. Mittagong, NSW 2575 (AU) Esplin, Trevor Thomas Santuary Point NSW 2540 (AU) Esplin, Patricia Anne Sanctuary Point NSW 2540 (AU) Morrison, Walter George Sanctuary Point NSW 2540 (AU) Morrison, Jean Sanctuary Point NSW 2540 (AU)

(72) Inventors: ESPLIN, Trevor, Thomas Sanctuary Point, NSW 2540 (AU) ESPLIN, Patricia, Anne Sanctuary Point, NSW 2540 (AU) MORRISON, Walter, George Sanctuary Point, NSW 2540 (AU) MORRISON, Jean Sanctuary Point, NSW 2540 (AU) (74) Representative: Kennedy, David Anthony  Kennedy & Co., Station House, 34 St. Enoch Square Glasgow G1 4DF Glasgow G1 4DF (GB)