Step 6 · Install Water Supply T-Valve
Take the T-valve that was included with your bidet seat. Inspect it to ensure the black rubber cone washer is correctly seated inside the top female-threaded connection. Carefully thread the T-valve by hand onto the male-threaded fill valve at the bottom of the toilet tank. Once it's hand-tight, use your adjustable wrench to give it an additional quarter-turn to create a snug, leak-proof seal. Do not overtighten.