This tutorial describes how to identify what type of fill valve or ballcock you have in your toilet tank.
Toilet Parts - Plumbing Parts - The Home Depot
VorMax Flushing Technology
【Enhance Your Toilet's Performance】Fix a leaking toilet with 2 (60 mm) drain outlet and turn into a powerful flushing. Using together with R&T fill
R&T A2423 2 Dual Flush Valve with Push Button Dual Flush Toilet Repair Kit
How to Adjust a Toilet Fill Valve
Index of Toilet Flush Valves by Brand
American Standard 7381002-400.0070A Dual Flush Valve #A2412, Toilet Flush Valves - Canada
LHCER Toilet Flush Valve,Urinal Flush Valve,G1in Retractable Urinal Flush Valve Hand Pressing Type Flushing Valve for Toilet Bathroom
Toilet Parts & Repair, How To Fix a Toilet
Common Toilet Problems You Can Fix Yourself
American Standard Ultima Manual Toilet Flush Valve 1.6 GPF
How to Replace a Toilet Flush Valve - Tank to Bowl Leak