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A cartridge is a type of ammunition packaging a bullet or shot, a propellant substance (usually either smokeless powder or black powder) and a primer within a metallic, paper, or plastic case that is precisely made to fit within the firing chamber of a firearm. The primer is a small charge of an impact-sensitive or electric-sensitive chemical mixture that can be located at the center of the case head (centerfire ammunition), inside a rim (rimfire ammunition), or in a projection such as in a pinfire or teat-fire cartridge. Military and commercial producers continue to pursue the goal of caseless ammunition. A cartridge without a bullet is called a blank. One that is completely inert (contains no active primer and no propellant) is called a dummy.
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.
In popular use, the term "bullet" is often misused to refer to a complete cartridge.

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  1. S

    Leaking kitchen mixer tap cartridge

    Hi, got a dripping kitchen mixer tap want to fix. Can't work out how to get cartridge out, not seen anything like the one we have on internet. Please see attached. Any idea?!
  2. A

    Unknown Thermostatic Cartridge

    Hi Guys, I have a leaking thermostatic cartridge and I'm trying to replace it but I cannot find the part number or any no-name ones with similar measuring. I bought the shower from Victorian Plumbing and it is the Milan Modern Thermostatic Shower in Chrome. It was bought in 2015 and their...
  3. P

    Single lever monobloc mixer tap with new cartridge is still leaking (not dripping from spout).

    The tap was leaking from its body (under the 2-way swivel handle; where you access the big brass nut and the cartridge) when turned ON more that a little bit. I've replaced the cartridge and it leaks in same way. It doesn't drip from the spout nor leak when turned off. So, as far as I can see...
  4. T

    Changing the thermostatic cartridge on the Triton Dart Eco

    Hi UK Plumbers Forum! This is my first post and just want to share a very simple “How-to” on changing the thermostatic cartridge on the Triton Dart Eco. I’m not a plumber but love reading about plumbing. The cartridge service kit used is the Triton 83312810, which can also be used in Triton...
  5. S

    Brand new Burlington Tay mixer with faulty thermostatic cartridge

    Just thought I would share this out of interest. I had a new bathroom installed and for the bath a Burlington Tay wall mounted thermostatic mixer valve (which also has a shower handset on a stand attached to the mixer). Anyway, it worked fine for a week and then it started refusing to change...
  6. T

    How to change a water filter cartridge

    I was wondering if anyone can give me simple instructions of how to change an Acquifier water filter cartridge? I believe I have to turn the water off first, under the sink, and need to locate a quarter turn valve. I was wondering if anyone can help me locate this valve or a point under the...
  7. K

    How to change a bath tap cartridge

    my bath taps have no obvious grub screw so how do I get it off to replace the cartridge? Is it as simple as the top just pulls off? I don’t want to break them! There is no makers name on them for me to contact. They are quarter turn taps. Thanks
  8. R

    Tool for removing cartridge?

    Hello all. I can’t stand my dripping tap any longer so trying to replace a cartridge. It’s a mono block mixer tap in the kitchen. I can take the headgear off no problem but the cartridge is recessed inside the tap housing - can’t a spanner to it, and it doesn’t look like there’s enough...
  9. M

    correct cartridge replacement for bristan

    Hello, I'm having a problem with my shower mixer, the hot water doesn't quite come out unless I open the flow to maximum and even then its not as hot as the other taps in the flat. I'm pretty sure its the thermostatic cartridge and I'm trying to identify the correct cart for it I've been advised...
  10. 8

    Thermostatic cartridge

    Hi, Been having some issues with a brand new thermostatic shower on a combi system. Before i fit the bar mixing valve, flow out of the open outlets comes out around 12 litres a minute, but once the bar valve is fitted i seem to have less than 2 litres a minute out of the head (no shower head...
  11. N

    Blanco Cruzan BM 7500 Tap Cartridge

    Hi all, Anyone know where to get a Blanco Curzon BM7500 cartridge? mine has failed and I've tried blanco tap spares and they don't stock them. Any ideas?
  12. W

    Identify cartridge/valve for Tap

    Small leaks around the levers on our tap/kitchen sink. Tap/unit is about 10 years old. I was wondering if you could tell me what cartridges/valve fit this please My dad's friend is a retired plumber and will be fitting for me. Image attached.
  13. David Gill

    Ceramic Cartridge Replacement?

    [/URL][/IMG] Any idea how to replace the cartridge in one of these taps? No top to unscrew, no grub screw in the body. Looks like it might just pull off, but don’t want to attempt it if it’s the wrong thing to do! TIA
  14. G

    No cold after shower cartridge change.

    Hi all, I just changed a thermostatic cartridge on a pura shower mixer as it was very stiff to turn. It tested fine initially before putting faceplate etc on and re-grouting but on first use today it is scalding hot even when knob is turned completely to cold. Any ideas?
  15. A

    Thermostatic cartridge issue

    Hello, I have an old Tritan Thames concentric mixer shower I am trying to replace the thermostatic cartridge. Due to the faulty part being old it appears seized within the housing. Any ideas how I can remove it from the brass ring to put the new one in. I have tried various things but nothing...
  16. T

    How to extract this diverter cartridge...?

    Hi, forgive what might be a newbie question (DIYer). I'm trying to replace the cartridge on a concealed diverter valve in my shower. But, I can't get the cartridge out. I'd expected to find a nut that I'd simply undo... Instead, there's this kind of half-circle ledge, which can't be undone...
  17. S

    Grohe basin mixer cartridge problem

    Hi, I have a problem with a Grohe bathroom basin mixer tap which was only installed around 12 months ago; it is becoming very stiff to operate. We live in a very hard water area and I suspect that the problem may be as a result of limescale build up in the cartridge itself. If so, is it...
  18. K

    Ceramic cartridge spindle wobbles

    Hi there. I'm a home DIYer with a question (please excuse if my terminology is incorrect). A tap I have has a wobbly handwheel. On removing the handwheel I found it's the spindle of the cartridge that's wobbling. In off or fully on postions the spindle doesnt wobble, it only wobbles when the...
  19. J

    Shower mixer tap cartridge replacement

    Hello all I came to replace the cartridge on my bathroom mixer tap, as thehot tap was leaking, and to get the head cover off there is a hole round the back that you slot an allen key into and undo the grub screw. Once i had unscrewed the grub screw i was hoping the cover would slide off and...
  20. Bogart

    Shower valve ceramic cartridge.

    Might be missing the obvious but here goes. I had a leaking on/off shower ceramic disc valve , was leaking from the spindle shaft so replaced both O rings and thought all would be fine, oh no. Put it all back in and now on/off function has no effect. There is play in so much as I can pull and...

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