usually

A convention is a set of agreed, stipulated, or generally accepted standards, norms, social norms, or criteria, often taking the form of a custom.
In a social context, a convention may retain the character of an "unwritten law" of custom (for example, the manner in which people greet each other, such as by shaking each other's hands). Certain types of rules or customs may become law and sometimes they may be further codified to formalize or enforce the convention (for example, laws that define on which side of the road vehicles must be driven).
In physical sciences, numerical values (such as constants, quantities, or scales of measurement) are called conventional if they do not represent a measured property of nature, but originate in a convention, for example an average of many measurements, agreed between the scientists working with these values.

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  1. K

    Worcester 24i Leaking CH Inlet

    Job was to add on towel rad, so drained down and went to fill back up On the flow its like a large 3/4 service valve on the ball it was hoying of the there! Got told worcester dont make these parts no more (as there so faulty :|) Set me back 4 hours today finding nipples and adaptors to get...
  2. D

    Landlord certs

    Hi guys, I don't usually do landlord Certs but Ive been asked to do a few by a landlord. What would you typically do for combis and gas hobs?
  3. L

    vaillant s53 fault

    Hi all Has anyone come across this s53 fault with the vaillant. had a couple now and the tech guy vitually admitted it was a design fault with heat exchanger..... anyway I normally only fit worcestor bosch (but expensive) or vaillants but have my doubts now about the vaillant. what would you...
  4. L

    Blocked cold feed

    Hi all can anyone tell me the symptoms of a blocked cold feed??? the chap that is training me either don'y know or didn't want to explain. thanks
  5. M

    gas oven not working

    Before i get an engineer out. Is poor cleaning usually the cause of an oven which doesnt work. the gas hobs work fine, just not the oven or grill i think. i have told the tenant she needs to do a good clean first. Any where in particular ?
  6. J

    What kind of flex

    What kind of flex do you wire boilers with? Always get the spark to do it but hes on holiday and aint too sure if its 0.75, 1.0 or 1.5 mm flex
  7. T

    Basin waste concerns.

    I need to install this type of two-piece waste next week. Clearly the mating surface of the lower piece tightens up against the bottom of the basin with a washer in between. The washer provided is one of those thin foam type and although I have fitted these without problem in the past, I am...
  8. J

    Globe taps: I don't understand how to disassemble it

    Hi everyone! It always starts like this : "My tap is dripping, so I want to replace the join" Then comes the catch: "I can't disassemble the tap". Have a look at picture below, showing you my globe tap : Except for the cylinder at the very top (which is the tap itself), it seems like it's...
  9. M

    does anyone still use copper in a 1st fix downstairs gorund floor

    Im doing a 1st fix today and was doing in copper with soldered joints the norm would usually use pipe and pipe and manifolds but this was better copper as it was a reovation track floors etc so didnt what to make the tracks massive using pipe in pipe as the house robbed when no one lived in it...
  10. V

    cast iron pipe

    helo ,,has any one installed traditional cast iron rainwater pipes? From my supplier catalogue i see special pins are used to fasten the pipes to the building. What is the best way of placing these? Plot hole, insert pi and use fast acting resins? Or perhaps pilot hole little smaller than...
  11. C

    Thermostat in main living room, or hall.

    Most houses usually have the room stat, in the main hall (often between the stairs). Just reading the manual for thehe siemens, and it recommends to install in the main living room. Where do others usually install?
  12. D

    Help with radiatiors

    Hi So I'm faced with the typical fun of trying to change imperial size radiators to metric. After thinking I was really clever getting extension pieces, I've now just realised I've made the cardinal sin of thinking I could cheerfully replace singles to doubles without any extra hassle. What I...
  13. D

    bath tap not lletting in water

    i have a pair of bath taps which are still under a five year warrenty , but i would like to try and repair the hot water one , which is not opening properly and water is not been allowed in . i have not inspected the tap fully but i have noticed that the clip is in place , any ideas on a fix please
  14. B

    how to check the flue performance of air heater?

    i am going to do the flue performance test of a Johnson and Starley air heater. But cannot find where is the best place to test the flue. Anyone has done this before? cheers
  15. G

    servicing

    Was wondering if anyone knows if the bigger companies charge housing associations for tennants not being in at properties when services have been pre booked to suite tennant being available for entry to service appliances. if i get offered a day of servicing i usually get a list of 8 properties...
  16. C

    Help With Traps

    Hi. I was wondering if someone can help explain the whole 'water-seal' part of Traps. I just dont get it at all. Example, traps fitted on flat bottomed appliances should have a minimum water seal of 38mm. Any help would be appreciated.
  17. Q

    Riello burner: Usually have to press the red reset button

    Hi All, I'm hoping for some advice. I have a 9 year old riello burner which is causing me some problems. When I turn it on at the control panel in the house the burner does not kick in all the time. It got to the point where I was having to go outside and press the reset button every time...
    • quantum
    • Thread
    • boiler burner button central heating system control plumber press reset riello switch usually
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  18. S

    What is usually done about a blocked toilet?

    As i am about to litter my area with adverts for small jobs and repairs to try and get experience i have been made aware that a common problem is a blocked toilet, when my toilet is blocked i usually put on a rubber glove and push the blockage through with two fingers, its nasty and dirty but it...
    • Smcart5
    • Thread
    • about apprenticeship basin blocked copper courses cylinder drains hose industry inside kitchen merchants nvq oil plumbers mate plumbing plumbing problems radiators skills toilet usually van waste work
    • Replies: 32
    • Forum: Plumbing Jobs | The Job-board

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