Electrical shock on water taps

[Mankadm]

My location.-Mumbai, Kandivili west
I have a flat on 5th floor.

I am getting electrical shock when I touch the water taps in my master bedroom.
The electrician has oked the earthing and we even replaced the metal junction l box with a plastic one on the wall behind the bathroom.
The similar problem is faced by two more flats in the same bathroom.
Please suggest a solution.

 

[Jeff H Young]

Absolutely get another electrition

 

[Sponsor]

 

[Sylvan]

Someone did NOT ground something properly. Jeff is correct you may end up being electrocuted