Cold water tank refilling noisily

[Philip624]

I had the ball valve replaced on my cold water tank in the loft, gravity fed system, and now it is very noisy refilling after a shower, it’s like a loud hissing noise which it never made before. Any suggestions as to what the cause is or how to resolve thanks

 

[Jurassicspark]

Could you show us what replaced the ball valve? A link of the product please.

 

[CountryFan]

Have you asked whoever fitted it why it makes the noise? Sounds to me like a possible Torbeck float valve was fitted.

 

[Philip624]

Thanks I don’t have a photo but it was definitely a ball valve

 

[CountryFan]

Thanks I don’t have a photo but it was definitely a ball valve

So similar to the above?

 

[Philip624]

Yep just like that which was what it replaced as well, I will ask the plumber but just curious as to what it is that’s causing it

 

[Burnerman]

If there's an isolator on the feed pipe, make sure it's a full bore one, and is fully open.
You can also adjust the angle of the white spout which could help.
John

 

[CountryFan]

Yep just like that which was what it replaced as well, I will ask the plumber but just curious as to what it is that’s causing it

Could be as above from @Burnerman, although it doesn’t have to be full bore, but fully open. Could be a faulty valve, hard to tell just from what you’ve told us.