Gurgling bathroom sink

[Gerryc100]

Hi guys. I have an issue with a bathroom sink, it gurgles when the tap is turned off. I tried clearing the p trap but it makes it worse and goes on longer. I’ve attached a pic. From what I’ve read online it’s a venting issue. Would either of the replacement parts be a good solution?

 

[Knappers]

Yes that would probably resolve the issue

 

[oz-plumber]

Probably not...

Gurgling generally means the sewer piping has a venting issue.
This does not mean that a vent is blocked.
It generally means there is a blockage somewhere in the sewer pipe and the pressure of the air is coming out through a trap.

I feel you have a more pressing issue than replacing a trap.....and it will only get worse.'

Get onto it asap, because you may have unwanted items coming up through your bath, shower or an overflowing toilet.

These early signs don't get better, they get predominately worse

 

[Knappers]

I'd try the anti vac trap first.
oz-plumber may be right but it's more likely (in my experience) that waste is a little too long or poorly angled and a vacuum is forming behind a slug of wastewater and sucking air through the trap seal - causing it to glug.
In severe cases it can actually suck the seal water completely out and leave you with foul air escaping from trap.

Try trap first.