If it is a closed couple, it is good practice to change the sealing ring http://www.wickes.co.uk/Wickes-Doughnut-Washer-For-Close-Coupled-Toilets/p/420067?CAWELAID=120135120000002083&CAGPSPN=pla&CAAGID=17408413132&CATCI=pla-193347846772&utm_source=google&utm_medium=cpc&utm_term=&utm_campaign=Google%20Shopping%20-%20Heating%20and%20Plumbing&tmcampid=&tmad=c&tmplaceref=jDT8NIuC&utm_content=sjDT8NIuC|pcid|43364569612|pkw||pmt||&gclid=CPPCw6DRh80CFeIp0wod3UYD2w
example of a closed couple
@lynx started
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If it is a closed couple, it is good practice to change the sealing ring
http://www.wickes.co.uk/Wickes-Doughnut-Washer-For-Close-Coupled-Toilets/p/420067?CAWELAID=120135120000002083&CAGPSPN=pla&CAAGID=17408413132&CATCI=pla-193347846772&utm_source=google&utm_medium=cpc&utm_term=&utm_campaign=Google%20Shopping%20-%20Heating%20and%20Plumbing&tmcampid=&tmad=c&tmplaceref=jDT8NIuC&utm_content=sjDT8NIuC|pcid|43364569612|pkw||pmt||&gclid=CPPCw6DRh80CFeIp0wod3UYD2w
example of a closed couple