On 10/02/2019 14:14, Sara Lavery wrote:
Potterton puma 80e makes a really loud banging noise when the heating
has been
on a while
https://www.homeownershub.com/img/hg


Chuck some boiler silencer into your system:-

https://www.wickes.co.uk/Adey-MC2-Ma...500ml/p/118635

others are available