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G'day folks, Rod from My Water Filter here today. And what we're gonna do is just have a quick look at a nine inch versus a ten inch cartridge. You might not think it's that important. It is vitally important. Two reasons why: one, the cartridge might not fit, or two, the water's not getting filtered, okay. Now, as you can see, on the outside the standard ten inch cartridges on the inside, the standard nine inch cartridges. Both, standard industry sizes, both used throughout industry. Ten inch is probably more common, so if in doubt, it's gonna be a ten, but, you do need to know. Different companies use different housings, and you can't tell okay, so if you have a look at your system, get a tape measure, measure the housing. It's not gonna help okay. What happens is, and I'm not sure if you can see inside there, but up inside there, there's a stump and a round ring.

And between that there, right, not normally a lot there, but most commonly, here in the head, you can see the size of the stem here. And that is what'll catch you out, okay. So, if you've got a nine inch, you need a nine. If you've got a ten, you need a ten, alright? I'll give you a quick look here. If we were to grab this nine inch Doulton Ultracarb cartridge, and we put it inside the system here, put the top on, screw it up, it's gonna fit in there, the top's gonna go on, she'll do up, everything's fine. We'll lock it on, but just listen. Okay, I hope you can hear that, it's just banging around in there.

Now, the reason for this video is, we just had a customer this week who's ordered a ten inch cartridge off us. And he's rung up to say that the water-flow is not as fast as it used to be, and there's something wrong with the cartridge. After a little bit of investigation what we've worked out is is last year, a customer came to our web-site without talking to us, and he bought a nine inch cartridge. He's put it into a ten inch water filter. He's had great water-flow. The water's been pouring out of the water filter, but the reason is that the cartridge is an inch too short. So, the water filter hasn't even been filtering for him for the last year. He's just been drinking tap water. Sad, okay.

This year he's come back and bought a ten inch. When he's put the ten inch in, and screwed it up and connected it, well the ten inch is sealed perfectly, and the reason that he's got a little bit slower water flow now, is because the water actually is going through the filter. Okay. As you can see, there's the ten, and I can feel it locking up now as I'm tightening it up. I can feel the friction between the rubber, where it's hitting. Alright, that's in there. Not a sound, quiet as a mouse. It's locked in there beautiful, okay. And that's what you need, okay. So, the customer that we're talking about has now got the water penetrating the cartridge. Yes, it's slowed it down. It does slow it down on these little filters. They're very tight. This is probably absolute point five, nominal point two. So, they're very, very tight cartridges. It does take a bit of push, to push the water through 'em. But that's what happens.

The slower the water pours out the spout, the better water you're creating. The more contact time, that the water's got with the cartridge, then the better quality water that you're making. Now let's say that you have got a water filter sitting on your bench, and you've got no idea how old it is, or what size cartridge is in it. Simply pull the top off, get the cartridge out, sit the cartridge on the bench, get your tape measure, and measure from the bench to the top of this black rubber, okay. The measurements run rubber to rubber. So, we sit it on the bench, get a tape measure, measure it up the side. And we'll just measure how tall it is. It'll be a nine inch or a ten inch, most probably. They are so common, compared to anything else, okay? But, they are both available. Thanks very much.