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cartridge

A cartridge or a round is a type of pre-assembled firearm ammunition packaging a projectile (bullet, shot, or slug), a propellant substance (usually either smokeless powder or black powder) and an ignition device (primer) within a metallic, paper, or plastic case that is precisely made to fit within the barrel chamber of a breechloading gun, for the practical purpose of convenient transportation and handling during shooting. Although in popular usage the term "bullet" is often informally used to refer to a complete cartridge, it is correctly used only to refer to the projectile.
Cartridges can be categorized by the type of their primers – a small charge of an impact- or electric-sensitive chemical mixture that is located: at the center of the case head (centerfire); inside the rim (rimfire); inside the walls on the fold of the case base that is shaped like a cup (cupfire, now obsolete); in a sideways projection that is shaped like a pin (pinfire, now obsolete); or a lip (lipfire, now obsolete); or in a small nipple-like bulge at the case base (teat-fire, now obsolete). Only the centerfire and rimfire survived mainstream usage today.
Military and commercial producers continue to pursue the goal of caseless ammunition. Some artillery ammunition uses the same cartridge concept as found in small arms. In other cases, the artillery shell is separate from the propellant charge.
A cartridge without a projectile is called a blank; one that is completely inert (contains no active primer and no propellant) is called a dummy; one that failed to ignite and shoot off the projectile is called a dud; and one that ignited but failed to sufficiently push the projectile out of the barrel is called a squib.

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  1. P

    How to remove this tap cartridge?

    Any ideas? There seems to be a retaining ring with 4 little holes in but it ain’t budgin! Any ideas gratefully received!
  2. B

    How To Remove Cartridge

    Please see attached picture. How do I remove this cartridge? I assume I need some sort of special tool to perhaps unscrew the metal retaining ring?
  3. GabeBury

    Help with square thermostatic cartridge removal.

    Hello, I am trying to replace the cartridge but I can not see where is the grub screw, please find the picture and kindly advise how I can remove the cartridge. Regards
  4. P

    New Member - Looking for advise to access and remove tap cartridge.

    Hi, I am a new member and looking for advice to access and remove a tap cartridge from my bath. I have a dripping bath tap which is driving me crazy. I can't see how to remove the cartridge to replace it and looking for any advice from anyone who has similar taps. I can obviously see the grub...
  5. T

    Cartridge change on a concealed shower mixer

    Hi there. I installed this concealed 4 way shower diverter and thermostatic valve in the early 2000s. I think it was an Ultra Helix from memory. The diverter (top) is leaking and needs replacing (or just the ceramic and seals). I cant for the life if me remember how I get the face plate off...
  6. K

    Concealed Shower Cartridge removal Help

    I am having issues with my Concealed Shower Valve, Its blending too hot, ive put this down to the shower cartidge probably needs a clean as its only been working ok for a year. Shower is fed on a 1.5bar pump with header tank. my main issue though is ive moved all the knobs and faceplate but to...
  7. L

    Changing cartridge on mixer tap

    Hi. Novice here! Bathroom mixer tap was getting 'sticky' and I so sprayed some wd-40 silicone lubricant through some of the gaps - unfortunately it has made it seize up and the tap needs quite a bit of force to either turn it on or change temperature. I'd used the silicon spray on a couple of...
  8. Martin891844

    URGENT Help with a tap cartridge size

    Hi all New here so if anyone can help it would be much appreciated thank you. Have to change a cartridge on a basin tap but never change on of these before. The cartridge looks longer than than a normal tap cartridge. Any links for the correct one would be great thanks.
  9. R

    Triton (mersey) thermo cartridge

    Hello all I'm trying to remove the thermostat cartridge on my concealed unit to service or replace it. The unit is a Triton. I believe it is a Triton Mersey but cannot be sure. The cartridge won't pull out despite considerable force, nor will the nut shaped part of the bit behind it budge. Does...
  10. E

    URGENT change Kitchen Mixer Tap cartridge

    I do not know how to open the cartridge place. I need to change my Kitchen Mixer Tap Dual Spout with Pull Out Spray cartridge. It is like Rangemaster Aquatrend Spring Kitchen Mixer Tap with Pull Out Spout...
  11. R

    Cant identify valve cartridge

    Hello all. I'm new to the forum here. Been doing plumbing for a while. I'm helping a friend who's shower was leaking hot water to spout. I puled the cartridges out and noticed someone had serviced the seals and washers before. They had Jerry rigged them with off washers and so on. Come to find...
  12. D

    Stripped gland or bonnet nut on cartridge gate valve

    I have a gate valve that shuts water off to outside hose bib, and it leaks through the valve stem when open. The valve was installed 25 years ago when the house was new, and is used seasonally to shut water off to the outside hose bib to prevent the hose bib from being damaged during winter...
  13. A

    Remover collar to access shower thermostatic cartridge

    Hi there, my shower runs hot then cold then hot then cold... To prevent i keep my combi boiler on low hot water temp setting. Tested all other taps etc and they're stable (can be consistently very hot if needed). Suspect thermostatic temp cartridge knackered in shower. Want to replace but cant...
  14. J

    New shower on/off cartridge operating clockwise

    So this has Crosswater stumped. I have a 4 way shower valve. When all the knobs are pointing up, everything is off. When I turn 90 degree to the left (anti clockwise) each shower unit turns on (overhead/handled/jets). One seized so, being the lockdown DIY expert that I became, I decided to do...
  15. johnwards

    Replacement cartridge for Architeckt Cascade Tap

    Hey, I installed a bunch of Architeckt Cascade Pillar Taps in my house 8 years ago, and over the last year or so most of the cold ones have started leaking. I can't find a replacement cartridge from googling, and when I phoned Plumbworld, they were no help, said they didn't stock the taps...
  16. M

    Trying to ID cartridge

    Trying to locate a replacement cartridge but having some trouble w this one, even though it appears to be a pretty standard cartridge. The valve operation is left/right, not in/out or up/down. No screw hole in end of actuator. Water main isn't turning easily so I'm trying to ID cartridge and...
  17. D

    New shower cartridge?

    Precursor, only ever dealt with electric showers. My shower has started dripping from the middle (temp and on/off selector). Is this likely to be the cartridge or are there replacement o-rings available? Shower is a concealed Hydramax (Aqualisa owned iirc). Also would it be difficult to change...
  18. A

    Releasing recessed holding nut to replace ceramic cartridge on watersmith tap

    Hi, I've been trying to find out how to release the retainer nut on a watersmith (Screwfix) mono bloc basin mixer tap. It does not have a hex nut but rather a recessed nut with two flat pieces opposite each other and elliptical the test of it. No space for grips, adjustable spanners etc. I've...
  19. Z

    Vaillant Ecotec Diverter Valve Repair Cartridge

    I've seen some replacement cartridges for Vaillant Ecotec diverter valves, just the innards. Aftermarket stuff, not official, and I know you're supposed to use official parts and all that, but the diveter valves on Vaillants are probably the weakest part i'd say. Has anyone used them and had...
  20. J

    Bristan bath mixer cartridge s[ecial tool..???

    Hi. Just had a head banging problem with Bristan Turns out you need a special tool to change the thermostatic catridge in the AR2 type bath/shower mixer. A box spanner wont do it. Bristan don't sell the tool but have sent a picture of it,and clearly it is a special item. I can't find any info...
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