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22mm

The 8×22mm Nambu is a semi-rimmed, bottleneck handgun cartridge introduced in Imperial Japan in 1904, used in the Type 100 submachine gun and Nambu pistol. The 8×22mm round was used during the Pacific War and Second Sino-Japanese War.

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  1. T

    22mm MDPE connection

    I want to reconnect some outbuildings to an existing water supply. The supply pipe is old 22mm MDPE and buried for a fair distance so not going to dig it up and replace it 😬. Question is can I use normal 22mm plumbing push-fit connectors to make the connection as finding 22mm MDPE fittings...
  2. S

    Identifying 3/4" copper from 22mm copper.

    I'm a kitchen fitter first and foremost, so occasionally encounter old pipes of varying sizes. From past experience I know how easy it is to misidentify old 3/4" copper pipe (apart from getting soaked when you get it wrong) and would like to know if there is a surefire way of telling it from...
  3. G

    22mm Gas Feed for 35kw boiler - How do I know this is big enough?

    Hi folks, i've just moved into a property last month and begun to take note of things that may need attention. One of which is the feed to a 35kw system boiler appears to be in 22mm flexible steel pipe (tractpipe, or teslaflex or w/e). Distance from the meter is only 4m-5m or so, and I assume...
  4. M

    Bending 22mm coated copper

    Is there a way of bending 22mm coated copper with a bender without stripping back the coating?
  5. ShaunCorbs

    Honeywell 2 ports 22mm

    I’ve got 9 going spare does anyone need any not doing singles just bulk either 4s or 5s etc
  6. P

    Water meter readings 22mm vs 15mm?

    Good day My question is concenrning a system where the main water meter is on a 22mm water line, this line is then split to 15mm lines. Will the 22mm line water meter have a larger reading over the 15mm line water meter?
  7. Z

    38Kw EcoTec 22mm or 28mm F/R?

    I'm moving over to a sealed system on my EcoTec 38kw boiler. The old flow and return were in 28mm which was there long before the Vailant was installed. I'm running 10 rads with a small UFH circuit and unvented cylinder. Could i get away with replacing the 28mm to 22mm instead on the...
  8. Polarismax

    About the diameter of a 22mm pipe

    The pipe is connecting to a 22mm tap. Why is the bottom part of the pipe wider? Can I still use a connection fitting for 22mm if I cut it at the bottom part? Thanks🙏🏾🙏🏾
  9. M

    28mm to 22mm pipework

    Hi All, I am in the process of renovating a property and have the floorboards up installing cabling etc, however it is the plumbing that I have to question and would like some advice if possible. The issue has been bugging me for ages as the house is my later fathers and I have always wondered...
  10. B

    Is 22mm supply pipe always required for combi boilers?

    Hi All, I need your advise as I'm really concerned here. I only just had regular boiler replaced with combi (Vaillant ecoFIT Pure 25kw). I had few surveys done and everyone stated the gas supply pipe from the meter to the boiler must be changed from current 15mm to 22mm. The plumber I used said...
  11. D

    Justifying the 'Rules of thumb' for 15mm and 22mm CH pipes

    Hi All, I'm trying to work out why the 'rule of thumb' is ~3 radiators on a single 15mm run... I've calculated the heat demand of my house at ~14kW: 3 bed 1930s solid wall, end terrace, no wall insulation 7 radiators 2 air change per hour for all rooms 21deg in all rooms When I do the...
  12. C

    Should I increase extension plumbing to 22mm

    Ive extended my house and need to run the plumbing, I will tee off from the main house which is 15mm, I'm wondering if it's worth increasing it to 22mm with 15mm tee offs to the outlets, or should I just keep it all 15mm, I'm wanting water pressure and volume to be better if multiple outlets are...
  13. A

    TMV valve under bath with 22mm hot water and 15mm cold water mains

    The bath taps have 22mm inlets currently the cold water mains 15mm is fixed to the tap by a copper adapter 15mm to 22mm. The hot water is 22mm gravity fed. Is it ok to add a 15mm T to the cold water pipe and then add 22ml adaptor to the T to connect to a 22m TMV . I cannot find any TMValves...
  14. V

    Central Heating - Blocked 22mm return pipe?

    Hello all. I've just joined, was going to post in the new members forum, but the first site generated email sent me here... I am here, as have a challenging and interesting problem, which I'll try as best to describe below keeping to the point and as short as possible, to avoid boring any of...
  15. J

    Why hot water copper pipe is 22mm and cold is 15mm?

    Hi All, I have this silly question. Water pressure for hot water is a bit low while cold water has a decent pressure. Why do they put 22mm copper pipes for hot water? It seems detrimental for already low pressure. Best regards
  16. dave100

    Does this type of 22mm fitting exist?

    Howdy, I am moving my cold water tank in my apartment bathroom and, as space is tight, I want to use a 90-degree elbow immediately after the water outlet at the bottom of the tank. The tank was fitted when the place was built here in Dublin 27 years ago. Here is the tank outlet: This...
  17. Antony_0

    20mm MDPE to 25MDPE (and 22mm Copper)

    Hi all, we're doing some renovation work to our property and we wanted to install a sauna house (includes shower) in the garden, irrigation system and outside tap. I've ran a 25mm MDPE from the inside utility room where the main stopcock comes into the house. I originally thought that it was a...
  18. M

    22mm copper pipe of 28mm copper pipe, what shall I run?

    Hi all. I'm new to this forum. Please go easy on me👷🏼 I'm currently renovating my house and my house currently runs from old lead pipes then soldered in to 15mm copper pipe. I want to replace the whole piping in the house from to bottom. My question is shall I run 22mm copper pipe then...
  19. E

    Is there a max run of 15mm from 22mm allowed?

    I am replacing a large (~2m long) old radiator below a window with a vertical one beside the window. The current rad tees off the old pipe (22mm diameter) and runs directly to the rad. Can I just cut into that tee'd section and extend to the new rad location that is about 2m away? Would this...
  20. B

    How many radiators off a 22mm flow

    Hi all I currently have 6 old radiators (downstairs) off what looks like 15mm pipework. It comes off the zone valve in 22mm and then goes under the suspended floor and is 15mm throughout. It takes forever to heat the rooms and as the radiators need replacing anyway I was looking to upgrade to...
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