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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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  1. C

    small central heating tank overflow pipe constantly dripping

    Hi all, hope someone can help me with this ongoing problem. The central heating overflow pipe drips constantly even with central heating off and water cold with no immersion on. Its an oil fired 30 year old system which also has a back boiler. I have emptied small tank to well below overflow...
    • chimo
    • Thread
    • central central heating constantly dripping heating overflow overflow pipe pipe tank
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  2. W

    is there a fitting to connect overflow pipe to w/m spigot on sink waste?

    thanking you
  3. Neil T

    overflow from cylinder

    Just been to look at a overflow problem at kids day care centre. The c/w cistern kept filling to point of overflow. I checked valve and replaced washer and float as both were looking dated. Dropped water level and left it for a few hours. Went back and level is back up and overflowing again. As...
  4. S

    Overflow after supply cut-off

    HI, thanks in advance for your time. I hope you can give me some advice... A large part of our area (Bracknell) had its water supply cut off this morning. The water is now back on, but every so often water from the cold tank in the loft escapes through the overflow pipe. I run the cold tap...
  5. D

    water leaking from overflow pipe :(

    Few days ago I tried to clean TF1 filter on my boiler but something gone wrong the pressure went to high and there was a BANG ,the water discharged via overflow pipe and now the boiler is loosing pressure and the water is dripping slowly trough overflow ,any idea what went wrong ??Would it be...
  6. S

    Leaking outside overflow pipe

    Hi, A few weeks ago I got a plumber out to look at my Baxi combi boiler which kept losing water pressure a few times a day and affected the central heating, I`d noticed the outside relief overflow pipe had water leaking out due to the pressure shooting up each time I repressurised the boiler...
    • SteveM
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    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  7. J

    blocked CWSC overflow?

    Hi all, I've heard it is quite common for over flow pipes on CWSCs to block. Is this true? In which case, how and why do they get blocked? And how would you test it (ie, hold the ball valve down and force the water to overflow)? Do you routinely test the overflows when fitting a new FOV...
  8. T

    Overflow tank

    Hi folks, I'm new to this forum, so hopefully you can help me. The water in my overflow tank is roasting hot, I'm wondering if anybody would have any answers for me. My system is very complicated, I have a storage tank, but I haven't got a hot press tank. I've also have my system plumbed up to...
  9. D

    21.5 mm overflow pipe

    hi just a quick question we went to a job the other day and the condensate from the boiler 21.5mm had an offset on it i was just wondering if anyone has done this before and how would you do it.
  10. H

    Sink overflow with washing machine/horizontal run/AAV

    My sink is draining slowly. My washing machine is pumping water up into the sink and overflowing it. I believe this is caused by drain blockage. I'm pretty sure this is caused by drain blockage. The waste pipe comes down from the sink, through a t-piece between the sink and trap (where...
  11. J

    Overflow challenge!

    Hi All, We have an overflow that is driving us to distraction. It's been pushing water out sporadically for years and we cannot get to the bottom of it. I"m looking for a plumber that has enough experience to look at this and understand the fix. We've had many plumbers look at it and scratch...
  12. A

    overflow leaking yet again

    Hi to you all, I only registered last night and this is my first post. I hope someone can come up with a solution as I'm at a loss with my leaking overflow from the larger water tank in my loft. It started a year or so ago, I renewed the rubber washer in the ballcock valve of the larger tank...
  13. B

    Over flow problem

    Hello, New to this site so be gentle! I'm looking for a second opinion. Just installed a low profile basin for a customer. £200+ for basin so no trade standard. When the customer washes hands with soap suds come back through the built in overflow? Had a bottle trap on it first, then after...
  14. P

    Thermal Store Dripping Overflow

    Hi, We installed a combination, open vented thermal store last year. As the header tank sits on top of the main cylinder the water in the header is really quite hot. I have noticed very slight drips coming from the overflow (more on a cool day) which I think is down to condensation. It’s not...
  15. D

    Confused by Dripping Overflow

    Hi all, Just wondering if anyone cant point me in the right direction with a dripping overflow. I had noticed that the overflow in the attic was dripping but only at random times. I went to have a look in the attic last night to see if the water level in the cisterns where high but they were...
  16. D

    Replacing Sink waste and overflow - how to bridge 1" gap

    I need to replace my sink waste and overflow. I think I have found the necessary part (Mcalpine FSW2PR-70) as it has a rectangle overflow connection instead of circle. However, the old waste had a waste adaptor that screwed into the old waste above and a connecting pipe (1 1/2") below. I...
  17. cr0ft

    Making an internal overflow on a cheapie syphon.

    Hi all. I don't know if this will help anyone but it helped me the other day. Had a new WC supplied with a syphon valve without an internal overflow. Never had that happen before so I guess it's not a common problem. Not keeping overflow pipe and fittings on the van I made a simple...
  18. J

    cutting into pipe that looks like overflow pipe

    hi all, Just been to see a job that I am starting next week, the mains pipe is on pipe that looks like overflow pipe, rather then copper or plastic, I need to cut into it and convert to copper somewhere. Any idea what it is? the whole building is run from 1 mains pipe and boilers in boiler room...
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