Noise when hot water comes on

[akwoody2]

Hello,

Im after a little help.

Im a novice at plumbing, all i have done regarding plumbing is re-fitted my bathroom.

At the weekend i decided to change my radiators. I have a conventional system in my house, i switched of the water supply to my tank and switched of my boiler, drained the system, changed the radiators and refilled with no leaks.

I have bleed all the radiators and all are getting hot.

The problem i have is when the hot water kicks in, there is a lot of wooshing and water running noised, almost sounding like large trickles. This wasn't happening before i drained the heating.

How do i stop it?

Many thanks

 

[RoyalCrabs]

Are you getting hot water from the taps, and at a good hot temperature ?

 

[akwoody2]

Are you getting hot water from the taps, and at a good hot temperature ?

The temperature is hot and the same as before

 

[akwoody2]

Yea, water temp is fine

 

[Thedeester1]

Does the boiler bang? Is the system conventional or a combi-boiler.
It does sound to me that there is still air in the system. Try shutting all the radiators off at both sides. Then Intoduce one at a time by opening the feed side (side with adjustable valve on it). Each time you introduce a radiator bleed about half a bucket of water from it. Once they are all bled open the lock shields up (other end of radiator) and balance the system.


Edit sorry I see its a conventional system. Near the tank there should be a vertical pipe with a bleed on top. Try bleeding this too. I modified my own system and since have problems bleeding first time. I might have to bleed this 3 or 4 times before all the air is out.

 

[Arthur]

Sounds a little like air in the pipe circuit to the cylinder coil - look for air bleed vents on the pipe runs.

Arthur

 

[akwoody2]

Does the boiler bang? Is the system conventional or a combi-boiler.
It does sound to me that there is still air in the system. Try shutting all the radiators off at both sides. Then Intoduce one at a time by opening the feed side (side with adjustable valve on it). Each time you introduce a radiator bleed about half a bucket of water from it. Once they are all bled open the lock shields up (other end of radiator) and balance the system.

Ok ill give i a go, its a conventional system

 

[Thedeester1]

If your still having trouble try turning off the boiler and turn on the hot water and heating at the controller. This means all the systems will be connected together. I was taught not to bleed with a pump running but I find it makes little difference! If anything the pump pressure will move airlocks.
This way all the air should make its way around the system till it reaches a point where it can be bled out.
Don't despair bleeding can be a work of art on old systems if they are not filled properly. Even if they are filled properly air can be in there and they need a secondary bleed!