Failure is the state or condition of not meeting a desirable or intended objective, and may be viewed as the opposite of success. The criteria for failure depends on context, and may be relative to a particular observer or belief system. One person might consider a failure what another person considers a success, particularly in cases of direct competition or a zero-sum game. Similarly, the degree of success or failure in a situation may be differently viewed by distinct observers or participants, such that a situation that one considers to be a failure, another might consider to be a success, a qualified success or a neutral situation.
It may also be difficult or impossible to ascertain whether a situation meets criteria for failure or success due to ambiguous or ill-defined definition of those criteria. Finding useful and effective criteria, or heuristics, to judge the success or failure of a situation may itself be a significant task.

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  1. M

    Non return valve failure?

    Hi there, All was good until one day the hot water suddenly started running quite a lot cooler. Putting my hand on the output at the boiler it's still hot there so I'm guessing there's a problem with cold water feeding into the hot water somewhere along the line. I have mixer taps on two...
  2. K

    Main 24HE constantly cutting out and firing back up on HW and Heating and intermittent flame failure light.

    I am having a problem with my main 24he boiler where the flame is constantly clicking on and off with the heating and when using hot water. Some times the flame failure light comes on but it ignites again after a few seconds. The plumber has changed a couple of sensors on the boiler and checked...
  3. S

    Double check valve failure

    Can anyone tell me what the nut is for on the side of the double check valve in the pipe leading to my outside tap? The valve is jammed closed and I wondered if it is possible to free it?
  4. S

    Main Combi 24 HE Flame Failure

    Hi Guys, Got a Main Combi 24 HE which is stuck on flame failure. Customer had a gas leak on the gas run which was repaired, after this the customer turned the boiler on from the spur and the boiler is was stuck on flame failure which flashes slowly. When hot water demand is given the pin hits...
  5. J

    Manufacturer's liability for product failure

    Hi all, Just after some other plumbers' views on an issue. I serviced a pro boil tap this week (PROBOIL 2 - Steaming Hot Water Boiler - It was just under three years old, and never serviced. It should be serviced annually, and a new filter every...
  6. J

    Shower mixer failure - replace or fix?

    On bad advice our builder installed a no brand/cheap built in shower mixer in our new bathroom 5 years ago. It has stopped working - and the water is almost impossible to adjust to the right temperature - and changes temp when other taps in the house are turned on/off. We have been told that...
  7. S

    Epic soldering failure on shower rough in valve, are inline shutoff valves the problem?

    Howdy I need to install a new rough in valve in my shower-bath. I bought a Delta 10000 UNBX and using the existing 1/2" copper piping was able to fit up the 2 inlets and pipe to the shower head and another to the tub, all 1/2 copper. The bathroom is on the ground level. In the basement right...
  8. M

    Rust spots on flexi sign of failure?

    What causes rust spots on flexi are they a sign that the flexi will fail soon? Thanks
  9. Stigster

    What can happen when the wrong pump is installed

    I've just found a load of old photos I took when I was an apprentice. Among them was this standard circulating pump that was installed on an unvented secondary return circuit. It should have been a bronze pump as I'm sure you know. I was called to re-install the unvented cylinder which was up in...
  10. S

    Flame failure after draining system

    Hi I drained my heating system to replace a radiator and now ive got flame failure on the boiler (potterton promax fsb he). I've repressurised it and bled radiators. Any ideas?
  11. T

    Thermostatic mixer failure and leak following new boiler installation

    Hi, We had a new combi boiler fitted this week, changing from a system boiler and water tank. The work did not touch the bathroom area. The first shower with the new boiler the concealed mixer failed and caused water to flow through the ceiling below. The mixer failed when I activated the stop...
  12. D

    Yet another cheap failure

    Buy cheap and you buy twice, and you may in fact flood your kitchen in the process. The flexi in the picture burst just under the tap for no apparent reason other than in my opinion it was cheap tat. The tap itself was an Ebay purchase and felt like tin, when compared to the Bristan one it is...
  13. J

    Hep2o pushfit grey, Grab Ring Failure ?

    I had a leak coming out from this reducing tee just after a month after installation. I think it’s an old Hep2O tee. I took it apart and found that the grab ring had scratch the PEX pipe. Making me think the pipe had move out of its place. Has anyone else have the same problem and any idea...
  14. C

    Hot tap in bathroom intermittent failure to flow

    Hi, this is my first post so please be kind! Have had a problem with the hot tap on bathroom sink for months now, sometimes its fine, sometimes no water comes out until fully turned on, sometimes you turn it fully on and nothing comes out until you start turning it off again. Husband (an...
  15. P

    legionnaires test failure

    Hi A kitchen tap thats in regular use has failed a legionnaires test, ive been asked to clear out the pipes? I know they have an isolated shower, maybe a dead leg somewhere but not directly on this pipe. So can it be a dirty pipe even if in regular use? I always saw this as a stagnant static...
  16. P

    Insulated side panel failure.

    The client heated the space to over 40c and approx 100m of side wall insulated panelling with a cement based inner skin have cracked badly. Probably about £5ooo pounds worth of damage. His aim was to get the slab temp to 30c. The ceiling (approx - 1500 sq/M) has the same...
  17. S

    "twist" type drain control failure

    Hi all, Today junior tried to open the drain after a bath and the thing shown below fell off. I am not even sure what it is called, if it can be fixed or needs replacement and most of all is it a DYI job? Thanks in advance for your advice / help
  18. R

    grundfoss ups2 failure after 7 months

    I have a 1970s one pipe system converted in 2011 to fully pumped with a new worcester 30dci boiler and a grundfoss pump. The pump failed in 2014 after a leaky bleed valve saturated it and it was replaced by a alpha 2. This failed in 2015 and was replaced under warranty by a ups2. This now...
  19. C

    Vokera Compact 25 ignition failure (can anyone help a rookie)

    Hi Guys New to the boiler diagnostics, so go easy Carried out initial electrical safety test.. Earth resistance, Resistance to earth, Short circuit and polarity all ok. Put a hot water demand on the...
  20. T

    Pump failure

    Had a call to look at a property with a glow worm flexicom the heating side is not working, the hw is fine, only the first rad is getting hot after that the flow pipe goes cold, the boiler is acting as it should and the flow from the boiler is hot. They had homeserve out first who said its a...
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