air in rad

[adrianfs1]

hi guys, got a prob with one rad in the bathroom, always having to bleed it, very noisy, rented house landlord unsympathetic, cant find any leeks wondering if the vent pipe outlet was to low would this cause suction.

 

[REDSAW]

how low is the pipe? need more insight.

 

[newbie1]

whatever the problem is its the landlords responsibility and as such no other person can undertake work in the house without landlords permission

 

[adrianfs1]

got full permission from landlord, and he will meet any costs.

 

[andyg0507]

Hi mate,

your cwc vent pipe should be a minimum of 150mm above the tank + 40mm for every meter head from the base of your hot water cylinder.

and the vent pipe above your feed and expansion tank should be a min of 450mm.

hope this helps.

 

[adrianfs1]

is that the opening of the vents or the bend in the vents

 

[andyg0507]

at the highest point on the bend.

 

[adrianfs1]

yes checked the height of pipes and all are correct, any other ideas? i also checked for leaks all okay!!!