Rushing water sound in rads

[Ryan cooper]

Everytime heating kicks on the radiators make a rushing water sound iv bled all rads no air just water comes out also had heatcare engineer in to take a look and says nothing they can do surely this can be solved

 

[SimonG]

if not air its water velocity.

 

[Best]

Your circulating pump might be at too high a speed, plus might require balancing valve on system if none fitted

 

[townfanjon]

Anything just been altered , new rads , new pump etc etc

 

[EvilDrPorkChop]

What system is it, combi, heat only boiler etc?

 

[John.g]

Anything just been altered , new rads , new pump etc etc

What is make/model of pump and what form of control is it set to. ie constant curve (fixed speed) or PP (proportional pressure) or CP (constant pressure, if available).