How to fix stiff shower tap?

[kingj]

  

Hello everyone. My shower tap needs to be tightened very firmly to stop water from dripping. This makes it hard for my kids to turn it on, so they often leave it open since it's difficult to close fully.

i had initially changed it from lever assembly to turn-taps since we were having issues with mixing of hot and cold water. 
What should I do before I call a plumber  

[MitchellMc]

Hi @kingj,

I'd recommend you try different types of valves such as the FIX-A-TAP 13mm 1/2" Leaklock Tap Valve, FIX-A-TAP 13mm 1/2" Sealtite Tap Valve or 12mm Copper Tap Valves. Often if the tap seat is worn or distorted these different shaped valves can stop a persistent drip.

If those don't work, it's an indication that the tap seat is worn and needs re-seating. You can do this yourself with a tap re-seater. If you feel the tap seat, which is the part inside the tap fitting that the tap valve squishes against to turn the water off, and it's rough, that's a definite sign that it needs re-seating.

Please let me know if you have any questions.

Mitchell