** Shares of Reliance Worldwide Corporation RWC.AX fall as much as 4.1% to A$4.020, posting their biggest intraday percentage decline since April 4
** Stock hits its lowest level since April 24
** Plumbing solutions provider flags pressure on 2025 Americas sales amid worries about U.S. tariffs
** Co warns of total cost impact of up to $35 million on its operating earnings for the next fiscal year from the tariffs
** Stock last down 1.7%, bringing YTD losses to 17.4%
(Reporting by Aaditya Govind Rao in Bengaluru)
((Aaditya.govindrao@thomsonreuters.com;))