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A filling factory was a manufacturing plant that specialised in filling various munitions, such as bombs, shells, cartridges, pyrotechnics, and screening smokes. In the United Kingdom, during both world wars of the 20th century, the majority of the employees were women.
In World War I, a filling factory belonging to the Ministry of Munitions was known as a National Filling Factory.
In World War II, a filling factory belonging to the Ministry of Supply was known as a Royal Filling Factory (RFF), or a Royal Ordnance Factory (ROF). These were all part of the Royal Ordnance Factory organisation, owned by the MoS.
The filling of smoke screen canisters and other pyrotechnic devices was also carried out by fireworks manufacturers, particularly in World War II, but these are not specifically covered by this article.

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  1. Greenstar123

    Greenstar 30si compact filling link

    Hello all, I want to increase the system pressure to 1.5 bar. Following the user manual (found one online) and some YT videos the filling link should be clearly visible there, but I still cannot find the filling link on my Greenstar 30si compact, or at least nothing there looks like it. It...
  2. J

    Radiator not filling from F&E

    Hi so I changed a towel radiator in bathroom from a normal radiator. I bunged the f&e tank and vent pipe , drained about a pint of water out the pipes. Altered the pipes to the new rad. Then removed the bungs. Gone to bleed the radiator it filled slightly now no air is coming out. I've...
  3. T

    Filling Loop Double Check Valve

    I’ve noticed on my old Bosch boiler the DCV on the filling loop is fitted to the boiler side of the water supply. And there is no isolator valve fitted. The only thing stopping it from leaking is the DCV? IS this ok?
  4. A

    Small holes on plastic paneling fitted on top of pre existing tiling.

    I've been told I need silicone but I'm not sure which one or what type. Also, once it's filled and dryed would it be worth sticking a piece of the same type of plastic on to of the repair holes?
  5. 89murph

    Glowworm Flexicom 30cx- repressurize my system

    I think the braided pipe is the one for repressurizing, but unable to find taps.
  6. R

    Filling in hole and covering gas pipe

    After some advice, had a gas fire removed and now left with the pipe capped and a hole which houses the pipe which was behind the fireplace. How is best to cover this up and fill it please?
  7. E

    Boiler pressure is too low, filling loop

    Hi all Moved to flat recently, and the heating is not very good. I realized the pressure is too low, below 1 bar. It is Meibes, product number 10920.26 OH5 So I am looking how to fix it. I am only a DIY'er, so bare with me. In the diagram you can see the fill loop mentioned, but that is not...
  8. S

    Window seal and gaps need filling too cold

    My house seems to be freezing and my double pvc glazing windows were installed over 20 years ago. The window seals have seen better days and there's gaps in between the window frames and window. Not really done anything like this before as I am not a plumber or carpenter. Does anyone which...
  9. M

    Radiators constantly filling up

    Hello, I have just had a new boiler with Google Nest installed the engineer was great and explained how it all works but now my radiators soundike they are constantly filling up I have bled all the rads with only water coming out all rads have TRVS installed apart from the bathroom towel rad...
  10. J

    REMS Solar push or a KAMCO power flush unit HELP ME CHOOSE

    Ive looked at the tech specs and it seems that the REMS has a lower flow rate but higher pressure at 5.5 bar. the Kamco has a higher flow rate so i understand that will be best for flushing a dirty system, however its maximum pressure of flow is under 2 bar. I wish to use a mashine for...
  11. S

    Slow filling toilet problem

    Hi I’ve got a very slow filling toilet which upon opening the cistern is due to the water coming very slowly out of the pipe and into the cistern. In the attached picture the cream plastic spout is where the water comes out and into the cistern but it’s just a trickle. I’ve checked that the...
  12. M

    Cistern not filling?

    Hi new to the plumbing industry, can anyone advise me on why the cistern is not filling with water but can hear the sound of water running? Would it be the side filling valve and maybe replace for a newer one? Also should the symphony i am holding have a washer at the bottom as this doesn’t...
  13. M

    Water tank constantly filling up

    Hello all, I think I've suddenly become an accidental plumber although do have a professional Unvented engineer coming to my property. but not till next week Does anyone know why a heated water tank would take on water 24/7 ? is this normal for an unvented tank (Range HE Tribune) no one is...
  14. L

    Greenstar Ri No filling loop

    Hi Everyone, hopeing someone can help We have a Greenstar Ri Boiler and its lost pressure, pressure gauge on top of the boiler reads 0.6 bar and i know this should be around 1.5bar, there is no external filling loop near the boiler or in the hotpress, there is a pipe in the hotpress with a red...
  15. T

    Any suggestions as to why my sink is filling up quickly?

    I’ve recently fitted a new toilet/basin unit which seems to not allow the water from the basin to drain quick enough without it filling up even with no plug in. I have checked the waste pipe work which is clear of blockages, I’ve changed the trap in case the flow rate wasn’t enough but it still...
  16. balders99

    Plumbing or Appliance Fault?

    Had a new Kitchen fitted just before Xmas with integrated Washing Machine and Dishwasher (never again!) Appliances are located around 3.5m away from the sink, in a corner, sink one side, appliances on the other. All hose lengths within manufacturers recommendations btw. Washing Machine drum...
  17. P

    Hissing pipes filling loop not working

    I hope you can give me some advice. The day after a pump replacement last week, on my Halstead ace, the boiler and pipes made a hissing noise when the hot water taps were used - a noise like when the pressure is too low- this continued when the taps were turned off and until the boiler stopped...
  18. T

    Greenstar 30i drips when filling.

    Hi all , went to a small top up on 30i yesterday at daughters house. Turned key , opened white valve gently , then water started to drip from right of filling key. Appeared to be coming from a small black knob to right of key. This seem a little loose so gave a gentle tighten. Any ideas what...
  19. R

    Flomasta Bottom Entry Fill Valve won't stop filling

    Hi all. I'm having issues with the Flomasta bottom-entry fill valve in a toilet; the 'float' comes up but doesn't have any effect, it simply won't stop filling, leading to water constantly flowing down the overflow. The cistern is in a sealed unit so without ripping the whole thing apart is only...
  20. D

    Filling UFH via boiler filling loop

    Just wondering if there are any issues with adding water to a UFH via the boiler filling loop… reason being wanting to flush out some gunk from a loop and ventilate but don’t have access at the moment to proper hose connection adapter so I can plug mains water at the manifold. Was thinking to...
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