Why would water tank overflow?
Why would water tank overflow?
When an overflow pipe is dripping or running with water, one of the most common causes is a problem with a float valve. As the water level rises, the ball rises to switch the water feed off again when the tank is full. The maximum water level in the tank should be about one inch below the overflow pipe.
Why have a cold water tank in loft?
Modern combi-boilers are fed directly from the mains thus do not require a cold water tank. Having a cold water tank gives a reserve supply should the water supply be disrupted and also helps even out demand on the mains water during peak demand.
Where is the stopcock on an attic water tank?
To replace the ballcock valve, you MUST first turn off your mains supply to your attic tank. There may be a valve outside the tank, near the ballcock valve but otherwise you will have to locate the stopcock, it is often under the sink in the kitchen, and use this to turn off the water supply to the entire house.
Is there a problem with my attic water tank?
If in doubt, get a plumber, the mains water supply to the attic tank has the potential to create a bad flood, if anything goes wrong. I am about to change my old zinc attic tank for a new plastic one.
How does a vented cold water tank work?
Cold Water Tank. The cold water tank in a vented cold water system stores the large volume of water to supply the hot and cold water systems that are not directly fed by the rising main. The water level within the tank is controlled by a float operated valve which is set to allow water to enter when the water level drops below the required level.
Why do we have a cold water tank in the loft?
This type of system also has a reserve of stored water in event of mains failure. So your property is probably in a low pressure area, that is why you have a cold-water storage cistern in your loft.
Is there an expansion tank in the attic?
This article describes open or atmospheric-pressure expansion tanks sometimes found in the attics or on upper floors of older homes. Where an attic expansion tank is installed the boiler may depend on the expansion tank and its overflow for safe pressure release.
Cold Water Tank. The cold water tank in a vented cold water system stores the large volume of water to supply the hot and cold water systems that are not directly fed by the rising main. The water level within the tank is controlled by a float operated valve which is set to allow water to enter when the water level drops below the required level.
This type of system also has a reserve of stored water in event of mains failure. So your property is probably in a low pressure area, that is why you have a cold-water storage cistern in your loft.
What should I do if my attic overflows?
Overflow from attic expansion tanks that are open to atmospheric pressure typically run outside to a roof gutter and drain system (risking freezing and blockage in some climates) or the tank may be connected to a building drain. Some attic expansion tanks were intended to be drained manually if needed and may not be piped to a drain.