New water meter fitted now got loud noise from mains pipe?

[Super Mario]

Makin loud intermittent noise since new meter fitted Does it need an expansion vessel?

 

[ShaunCorbs]

main cant expand back due to check valve my thought yes a ex vessel will help

 

[Super Mario]

main cant expand back due to check valve my thought yes a ex vessel will help

Which 1 the little white ?

 

[ShaunCorbs]

Which 1 the little white ?

A little shock arrestor will help or a small vessel

 

[Super Mario]

Or pressure reducing valve?

 

[ShaunCorbs]

Or pressure reducing valve?

Depends what incoming pressure you have above 4.5 yes below not worth it