new megaflow PVR bangs loud why

[john6808]

i have had a new prv fitted on my megaflow 170L unvented tank when i turn on the hot water it bangs i have tried to
pressurise but it makes no change

 

[Burger]

I’m not clued up on megaflo’s but are you sure it’s the prv banging?

 

[garygvl]

when you say prv, prv or t&p. does it bang when you turn hw off. deadleg????

 

[Burger]

when you say prv, prv or t&p. does it bang when you turn hw off. deadleg????

Airlock, stopcock jumper, or 1/4 turn tap being shut off too quick?

 

[king of pipes]

Any pictures available? Kop

 

[townfanjon]

Dont laugh is this a bang or a rumble ?
Are you just shutting a tap off too quickly ?

 

[john6808]

Problem solved plumber called today didn’t admit it but I think he put the flow the wrong way

 

[Burger]