Noted dear! Thanks for UR PM too! Appreciate UR kindness to share. Guess I prob leave the small drainage trap aside.. Sully buy liao, no use... Those traps Shld be cheap in Singapore. Let plumber fix normal ones.. Love the Phillips light switches, URs working good? Just buy and get electrician to fix? It's metal? My plastic ones for my current place got stuck and electricity prob melted it. Have to get it changed.. But my concern is if Metal, will it be dangerous if electric pass through it? Will we be electrocuted? Haha.. Ks here..