overflow
In computer programming, an integer overflow occurs when an arithmetic operation attempts to create a numeric value that is outside of the range that can be represented with a given number of digits – either higher than the maximum or lower than the minimum representable value.
The most common result of an overflow is that the least significant representable digits of the result are stored; the result is said to wrap around the maximum (i.e. modulo a power of the radix, usually two in modern computers, but sometimes ten or another radix).
An overflow condition may give results leading to unintended behavior. In particular, if the possibility has not been anticipated, overflow can compromise a program's reliability and security.
For some applications, such as timers and clocks, wrapping on overflow can be desirable. The C11 standard states that for unsigned integers modulo wrapping is the defined behavior and the term overflow never applies: "a computation involving unsigned operands can never overflow."On some processors like graphics processing units (GPUs) and digital signal processors (DSPs) which support saturation arithmetic, overflowed results would be "clamped", i.e. set to the minimum or the maximum value in the representable range, rather than wrapped around.
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The most common result of an overflow is that the least significant representable digits of the result are stored; the result is said to wrap around the maximum (i.e. modulo a power of the radix, usually two in modern computers, but sometimes ten or another radix).
An overflow condition may give results leading to unintended behavior. In particular, if the possibility has not been anticipated, overflow can compromise a program's reliability and security.
For some applications, such as timers and clocks, wrapping on overflow can be desirable. The C11 standard states that for unsigned integers modulo wrapping is the defined behavior and the term overflow never applies: "a computation involving unsigned operands can never overflow."On some processors like graphics processing units (GPUs) and digital signal processors (DSPs) which support saturation arithmetic, overflowed results would be "clamped", i.e. set to the minimum or the maximum value in the representable range, rather than wrapped around.
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J
Pipe leak from overflow?
Good morning, I have a Johnson Starley Quantec 24s that provides hot water to a tank and heating via hot air to the house. I have noticed a leak in the pipe which I think may be an overflow pipe? What i want to know is if this is something I could attempt to fix myself..? Any feedback...- JD_TryingToLearn
- Thread
- leak overflow pipe
- Replies: 4
- Forum: Central Heating Forum
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K
Intermittent Overflow of Feed and Expansion Tank
Hello my parents have a house with an open vented system. It has an oil boiler feeding 4 circuits of radiators and also an indirect hot water cylinder. It also has a solid fuel fireplace back boiler (with 4 pipes) to it. The fire can heat both the radiator and the hot water. The fire is never... -
S
Storm water back up, overflow of gutters
Hello all, We have recently moved into a home, completed in mid 2014. With much heavy rain over the past month, we have seen the gutters overflowing all around the house. We have 2 x 10,000L tanks that the down pipes flow water into, and the excess water flows into storm water out to the... -
J
Kitchen sink overflow
Hi all, Has anyone come across a kitchen sink overflow that would fit a ceramic sink? They all seem to be made for stainless steel (the one I picked up from the merchant didn't have threads long enough to fix through the overflow hole). Thanks Jennie -
C
Water overflow from CH expansion/fill tank
I have intermittent problems with hot water flowing into my central heating expansion/fill tank from the vent pipe sometimes when the system starts first thing in the morning causing the tank overflow to run. It does not happen every time and it only seems to happen first thing and not when the...- Chis
- Thread
- overflow tank water
- Replies: 12
- Forum: Central Heating Forum
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Extending McAlpine flexi overflow on HC2650UK
Hi all I have this McAlpine overflow and waste HC2650UK: https://mcalpineplumbing.com/sites/default/files/uploads/installation-instructions/hc2650uk_2.11.2018.pdf The flexi overflow is not long enough. I thought it might be possible to extend it by fitting ordinary pipe and an appropriate...- garygarygary
- Thread
- america flexi mcalpine overflow usa
- Replies: 0
- Forum: USA
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P
Overflow pipe off heating system
Hi Has anyone come across this small bore copper pipe that runs off the central heating. The pipe runs up to the roof space and terminates in the central heating small feed tank. It seems to act as a vent or overflow for whenever the client turns on the hot water. The coil heats the water and...- Paul Cockhill
- Thread
- heating heating system overflow overflow pipe pipe system
- Replies: 3
- Forum: Central Heating Forum
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F
Overflow from cold water tank won’t stop
Please can anyone give me advice. The overflow from my cold water tank started dripping so I changed the complete valve and ball. I set the ball to maximum on the arm and still it continues to trickle water. Would changing the 4 1/2 inch ball to a 6 inch ball help. Any help to stop this... -
A
Dripping overflow from pressurised CH system on duplex tank line
There is a constant drip from the 22dia overflow line which terminates at the HW cylinder but it is not the cylinder which is leaking as the tundish is always dry. There is cold water feed to the cylinder which has branches to 2 off expansion vessels with a PRV which can release across into the... -
F
Bath overflow bad fit.
I’ve fitted this waste overflow pipe to my roll too but seems to not fit, is it wrong for the bath or can I make it fit somehow? -
D
Is this safe? Open vented CH system has overflow capped.
Good Evening All I have a general question - I have searched the inter web and can't find an answer, Recently I had an issue with a scalding hot header tank on an open vented system. Boiler is fairly new, British Gas advised that it is being caused by sludge. They cut out the offending pipes... -
J
How do I stop water supply to feeder tank
I have had an intermittent overflow from my feeder tank in my flat for some time. One plumber changed the ball valve and another changed the setting on the central heating pump. I have been staying with a friend during the lock-down. Before I left I turned off the boiler and closed the stopcock... -
G
Overflow running when heating or hot water on
Hi all, I have a customer with open vented system,cold feed from f&e tank is teed into flow just above cylinder coil where in enters attic as expansion/vent which terminates through roof The tank overflows whenever heating or hot water is on and stops as soon as boiler/pump goes off,so it’s... -
W
cold water storage tank in the loft has started to overflow.
The cold water storage tank in the loft has started to overflow. First post ever and not sure of my way around, I’ve listed my problem the way it happened My central heating system is a gas back boiler, been running fine for years. I usually use an electric immersion tank through the night on... -
R
Omg which Bathfiller is best? Aqualisa/Geberit/ Hansgroher!
We are stuck! And really need help sorting this family bathroom .. we decided on a Bette steel bath in a tiny bathroom love the idea of bath fillers have great water pressure(new unvented boiler)But Are bathfillers a good idea in the first place??!! - very impatient at the best of times - so any... -
C
Half of drains cause floor drain in basement to overflow
We most likely have a clog problem that we can't seem to resolve. These are the details: The drain has been slow in the tub in bathroom #1 (located on the east end of the basement of our ranch home) for a while, but it was always keeping up pretty close and finished draining within 30 seconds... -
S
19mm overflow repair ?
I have a 19mm ABS pipe passing through wall to exit over an outside drain .... routed 'internally in the inner timber frame wall' to provides the condensate drain for boiler. The piece that stuck out of the wall has broken off leaving pipe flush with brickwork. If the pipe was outside... -
O
Overflow likely source?
I have a constant overflow coming from the main tank in the loft. It builds from a trickle to a pour. The isolation valve on stopcock is off. The expansion from immersion heater hangs over the tank, but is dry. This tank is highest in loft, so only source must be mains coming back up through the... -
B
Position/location of bath overflow
Hi, I’ve just moved in to a brand new build apartment and when trying to bathe noticed that the bath overflow (also a twist and pop up plug) is directly in the centre of the bath depth at the tap end. This means that you can only run a shallow bath as obviously when you are in the bath you don’t... -
Leaking Overflow from Baxi DuoTec Combi 28 HE A. is it faulty PRV ?
Leaking Overflow from Baxi DuoTec Combi 28 HE A. Is it a faulty PRV ? Pressure gauge is showing zero so no central heating or hot water. When I try to re-pressurise by opening the fill valve, the gauge will only rise to just over one bar and the CH will then work. BUT... all the water rushes...- Bottom
- Thread
- baxi combi duotec faulty leaking overflow prv
- Replies: 2
- Forum: Central Heating Forum
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