Search the forum,

plug

A spark plug (sometimes, in British English, a sparking plug, and, colloquially, a plug) is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within the engine. A spark plug has a metal threaded shell, electrically isolated from a central electrode by a ceramic insulator. The central electrode, which may contain a resistor, is connected by a heavily insulated wire to the output terminal of an ignition coil or magneto. The spark plug's metal shell is screwed into the engine's cylinder head and thus electrically grounded. The central electrode protrudes through the porcelain insulator into the combustion chamber, forming one or more spark gaps between the inner end of the central electrode and usually one or more protuberances or structures attached to the inner end of the threaded shell and designated the side, earth, or ground electrode(s).
Spark plugs may also be used for other purposes; in Saab Direct Ignition when they are not firing, spark plugs are used to measure ionization in the cylinders – this ionic current measurement is used to replace the ordinary cam phase sensor, knock sensor and misfire measurement function. Spark plugs may also be used in other applications such as furnaces wherein a combustible fuel/air mixture must be ignited. In this case, they are sometimes referred to as flame igniters.

View More On Wikipedia.org
Recent contents Top users
  1. N

    No plug on boss connection = leak & smells

    Purchased a new build Flat 2.5 years ago and since start I've complained to the builders about smell from ensuite (wet room) they have been fairly dismissive however had sent plumbers 5-6 x that have found "no issue" Last week had large leak and after plumber I contacted made hole in cupboard...
  2. J

    Radiator blanking plug size

    Hi, ive bought a flat panel aluminium rad off ebay and one of the 4 outlets is slightly larger than the other 3 by about 1 mm. Has anyone come accross this before and so what is the solution. Cheers
  3. M

    Plug waste pipe hole - kitchen sink

    Hi - looking for something suitable to simply cover the hole for the sink overflow. I don't need it connected up to the waste so just want to use somehing to fill it and make it look nicer. Could anyone recommend something? The hole is approx 30mm wide. Many Thanks
  4. Q

    Anyone using a WiFi plug as a smart programmer?

    Hi, I'd like to replace my Baxi 105e built in programmer with a smart option. I do not need a room stat as my trv's manage the temperature. I use WiFi plugs around the house that have all the characteristics of a programmer, on/off multiple time/day setting, manual on/off options even outside...
  5. T

    Trouble removing plug release/ overflow cover.

    I can’t seem to remove this plug release/ overflow cover. I need to tighten the screw which makes the plug pop up, there is no access through the cover, I have tried prying it off and twisting it, am I missing something obvious or just need more brute force? When I apply pressure it does pull on...
  6. T

    forenza bath pop up plug

    Hi I've just had a forenza bath installed. I would like to use the bath but for some reason the water won't stay in. It seems to slowly drain through this pop up plug. Does anyone know how this bath plug works? I've tried turning the round leaver to fully close so water doesn't drain...I've...
  7. L

    Replacement part for push/pull lever sink plug.

    Hi there, My nephew pulled off an already slightly coroded under sink connection rendering our pull/push lever sink plug useless and leaving us with a hole under the sink which leaks if water is run in to the basin. I've got several photos showing the mechanism and i'm hoping someone might be...
  8. A

    Changing a sink plug - some basic questions

    Hi - this maybe a bit basic, but I have a clickable sink plug that is broken and needs replacing. The part is a BRISTAN, part number W BSN CLICK C. See attached Image. I found out this is now discontinued, and the new part needs the waste pipe to be changed as well. The new BRISTAN part code...
  9. H

    HELP PLEASE – Plug mechanism is broken

    I could do with some advice please. My bath has an overflowand plug, which lifts when you turn a handle. Not particularly unusual, I know. The handle has stopped twisting, meaning I can’t lift theplug. For a long time the handle didn’t lower the plug (I just pushed it down)but now it won’t go...
  10. Y

    Need help replacing pop-up bath drain plug

    Hi guys, Water has been leaking through the ceiling below the bath. For a while the plug has coroded and the pipe underneath the bath is loose. We have a twist handle pop-up and I'm guessing if I need to change the plug (and fix the pipe below) I need to replace the whole black mechanism? I'm...
  11. R

    click-clack plug problem

    Hi, Newbie here, apologies if duplicating previous threads. I used sink unblocker to free up some of the waste built-up however after doing so, the click clack mechanism stopped working. The plug would not stay down, only up. After spinning it in either direction a few times thinking that it...
  12. eagleeye

    Bath plug

    Don't suppose anyone on here knows what make this clicker bath plug is by looking at the image
  13. G

    plug superser into gas socket?

    me and my friend have just moved into a new flat. it's august now so its quite warm, but we're concerned about the winter. we've just bought a superser on ebay, but we aren't allowed to bring LPG into the flat. On the other side of the wall that we want to put the superser, there is a disused...
  14. S

    Where to get a 3/8 cistern Plug?

    Hi all Does anyone know where to get a Geberit 3/8 cistern plug by thursday? I thought it was going to be easy but they seem to be harder to find than expected. If all else fails, i'm going to try and use a cistern bolt kit but would rather use the correct bung if i can get one? Thanks in...
  15. U

    End Cap Or Plug For Downpipe

    Hi All. I've a horizontal 65mm square downpipe that needs plugging or capping, preferably without solvent. These endplugs exists: SQUARE PLASTIC BLACK BLANKING END CAPS TUBE PIPE INSERT PLUG BUNG BOX SECTION | eBay but they don't seem fit for purpose as the diameters are wrong. Am I...
  16. T

    Bad Smell coming from shower plug hole

    i have just moved into a new house and the en suite shower in the upstairs bedroom has a smell coming from the plug and does not drain that quick. i have tried a couple of different plug unblocking chemicals but it has not worked. I am not a plumber at all and the plug seems a bit strange which...
  17. rpm

    Plug and play Bidet?

    Came across this the other day thought I`d share.
  18. J

    Sewer smell from shower plug hole - dodgy air admittance valve? Pls view pic and help

    Hi, I hope you guys can see the picture? To explain; this photo has been taken through a hole cut into my garage ceiling exposing the outlet from my bedroom ensuite contained within the garage roof space. The toilet is directly behind this wall, as is my shower - the White 90 degree is the...
    • JJBanjo
    • Thread
    • admittance air dodgy help pls plug sewer sewer smell shower smell valve
    • Replies: 10
    • Forum: Plumbing Jobs | The Job-board
  19. M

    Removing shower waste plug clamped to shower tray base

    Hi The aluminium plastic cover keeps coming off as one of the plastic plugs on the shower base has snapped off. I would like to remove the base which is clamped onto the shower tray. Please see photo. Does anyone know how I can get it off, I presume it unscrews anti clockwise but I don't see...
  20. A

    Gas pipe across plug socket safety?

    Hi, I have a double plug socket on a skirting board over which I need to install a new gas pipe. The socket is no longer used. Is it safe to put a double blanking plate across this plug socket and for the new gas pipe to run across it?
Creating content since 2001. Untold Media.

Newest Plumbing Threads

Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock