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G'day, folks. Rod from My Water Filter here today, and what we're gonna take a look at is the Doulton's ceramic carbon cartridge, okay? It's a gravity filter style, so it's a candle that bolts in the top of most gravity filters nowadays, and they are a great cartridge. Don't get me wrong with these Doultons. Obviously, the ceramic on the outside is amazing for filtering pathogenic organisms and bugs and bacteria, et cetera. And that's why they're really good on rain water and that sort of thing.
They also shelter and stop, block any sediments going through, and if they do block up on the outside with sediments and the flow rate slows down, normally about a one liter an hour flow rate, you can get some hundred grit sandpaper or a green Scotch-Brite scour pad, a new one that hasn't been used for anything else, and just scrub them all over, and give them a red hot scrub underneath the flowing tap and you just scrub all the outside. They're five or six millimeters thick in depth. So you can scrub them up to a hundred times on the outside and get them clean and get them flowing again if there's sediments in the water. Things are always changing, so these have been an amazing cartridge for a long, long time. Unfortunately nowadays, a lot of our capital cities in Australia have moved from chlorine to chloramine.
So I'd use this cartridge possibly in Western Australia 'cause it's gonna stop the sediments. There's good carbon inside to remove 95 percent of the chlorine, but it's not touching the chloramine. So I wouldn't use this Doulton cartridge in the Brisbane, New South Wales, and Victoria anymore because they've just got a different product in the water. Okay. No worries on rain water. Very recommended for rain water, and a lot of people are using it, so that's a great thing with use for rain water. I'll just taking it out and give you a quick look.
They will go into almost any gravity water filter. Okay. The main thing with these is just the hole, okay? So as long as you've got enough depth in the top tank of your gravity filter, they're gonna bulge into any gravity filter as long as you got the height there for it, and the main thing is here on the bottom, so the good quality gravity filters candles like these, you'll find you got only about a 12.5 millimeter shaft on them, so as long as the hole in your top tank is at least 12.5 millimeters, then that'll go in.
Honest truth, if it's not 12.5 millimeters, you could drill it out to this size so it'll go in. So it's always good to have a decent cartridge in there. So obviously the rubber washer slips over the shaft, goes down through the top of the top tank, and then we've got the washer that comes out from underneath the top tank, the flat of the washer slides on the base of the top tank so you are able to tighten it up nice and tight, and that's basically it. We tighten him up, lock him in the top tank, and there's the water there. The cartridge. Water penetrates through, down through, drips in the bottom tank, okay? So they're a good little cartridge, but just remember what I said about the chloramines and stuff nowadays, and it is horses for courses with water filtration. They're good for a couple of thousand liters, six to 12 months, depending on how much muck is in the water and how much it's going to slow it down. But a good scrub does bring him back to life and get him going. So have a look at the test results and et cetera and information on the page and give us a call if we can help you in any way. Thanks very much.