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Why is my hot water tank making some sort of irritating whistling noise after I take a shower?
 
You need to give more details if you're expecting people to be helpful.
What system do you have tank fed or main feed? How old is the tank? It's it the tank whistling for sure? Electric or boiler heats it up? When did it start, any alteration happened before it started doing it?
 
You need to give more details if you're expecting people to be helpful.
What system do you have tank fed or main feed? How old is the tank? It's it the tank whistling for sure? Electric or boiler heats it up? When did it start, any alteration happened before it started doing it?
Not sure what system but a tank from the attic fills the hot water tank. Tank is about three years old.A boiler does in fact heat it up.Happening maybe a month now.Only alteration was the cylinder return gate valve and cold feed to cylinder gate valve that was messed about by my kids
 
Not sure what system but a tank from the attic fills the hot water tank. Tank is about three years old.A boiler does in fact heat it up.Happening maybe a month now.Only alteration was the cylinder return gate valve and cold feed to cylinder gate valve that was messed about
Do you have 2 tanks in the attic or only one?
In my opinion the valves supposed to be open.
The boiler heats up the water in the circuit which actually goes into the coil within the cylinder. The hot coil warms up the water in the cylinder which comes out of the tap. Two different circuits, the two water don't mix. The water from the boiler through the coil has additives to protect the closed circuit. When you open the shower maybe the cylinder has a restricted flow now from the storage tank. If there is a valve on the boiler side it can be dangerous however that side not likely to have a valve with a turning wheel.

Wait until someone confirms this.

If the young ones have access to these maybe it worth to swap the valves for screw driver operated ones without handle.
You could open the valve(s) a little bit more if you can and check the noise if it's getting any better.
 
A whistling sound could well be the ball valve in the Cold Water Storage tank in the loft.
This will be re-filling after your shower, easiest way to check is just go up in the loft after someone else’s shower- if it is the ball valve it will be obvious.
 
Do you have 2 tanks in the attic or only one?
In my opinion the valves supposed to be open.
The boiler heats up the water in the circuit which actually goes into the coil within the cylinder. The hot coil warms up the water in the cylinder which comes out of the tap. Two different circuits, the two water don't mix. The water from the boiler through the coil has additives to protect the closed circuit. When you open the shower maybe the cylinder has a restricted flow now from the storage tank. If there is a valve on the boiler side it can be dangerous however that side not likely to have a valve with a turning wheel.

Wait until someone confirms this.

If the young ones have access to these maybe it worth to swap the valves for screw driver operated ones without handle.
You could open the valve(s) a little bit more if you can and check the noise if it's getting any better.
Yh I may change the valves when I can.To answer ur question there's only one tank box in the attic.I'm thinking there may be air stuck somewhere that may be causing the hot water tank to make a whistling noise when refilling after a shower
 
A whistling sound could well be the ball valve in the Cold Water Storage tank in the loft.
This will be re-filling after your shower, easiest way to check is just go up in the loft after someone else’s shower- if it is the ball valve it will be obvious.
Is there anything in particular I should look out for that may be faulty?
 
The float valve that refills the tank.
The whistling is often cured by replacing the diaphragm, but can also be a sticking mechanism or a hairline crack in the brass or a damaged forcing cone.
Tbh if you don’t know your way around the float valve just replace the whole thing (£7 or £8) - that is what 90% of plumbers would do anyway.
 
Try what @Ben-gee suggested first. The ball valve gives hissing noise if faulty typically. Otherwise, the valves the kids tempered with could be somewhat off.
No problem 1.is there a way to remove air from the system because I feel that my be the issue and 2.is there a certain position the gate valves need to be
 
No problem 1.is there a way to remove air from the system because I feel that my be the issue and 2.is there a certain position the gate valves need to be
The valves supposed to be open. They are there to save water in case one needs to drain off some water for maintenance so don't need to let the whole storage tank of water down the drain. In some cases if you get too much pressure tho it can be partially closed to restrict flow.
How high is the tank approximately? May you can take a picture of the components? Did you try to open them up a little?
 
The valves supposed to be open. They are there to save water in case one needs to drain off some water for maintenance so don't need to let the whole storage tank of water down the drain. In some cases if you get too much pressure tho it can be partially closed to restrict flow.
How high is the tank approximately? May you can take a picture of the components? Did you try to open them up a little?
No I never tried to open any components but the tank is about 1.1 metres tall .had a previous issue with the return flow gate valve that according to people from here was supposed to be three turns closed from open position so that's why I'm wondering if the valves are supposed to be in a particular position
 
Not quite clear which pipe you're mentioning. There is such pipes as 'flow' and 'return' there is no 'flow return'.
Hard to tell which position the valves should be. Normally open but as I see someone adjusted the water flow with them.
 
Not quite clear which pipe you're mentioning. There is such pipes as 'flow' and 'return' there is no 'flow return'.
Hard to tell which position the valves should be. Normally open but as I see someone adjusted the water flow with them.
My fault the tag says cylinder return balancing valve that has been tampered with previously by the kids
 
My fault the tag says cylinder return balancing valve that has been tampered with previously by the kids
Have you got a pump on the return pipe or maybe on the flow pipe?
Could be that the restricted flow, if the valve turned off a bit, causes the pump to struggle.
Seriously, get the water going and identify the source of the noise.
 

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