The three stage cartridge that goes inside your Roselyn shower head. One filter covers about three months of daily showers.
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When to swap it
The media inside binds what it pulls out of your water. Once it is saturated, the water runs straight through. Nothing breaks and nothing looks different, it simply stops working. That point comes at roughly three months of daily showers.
That faint pool note in the steam is the first thing people notice. It means chlorine is reaching you again.
The pulling feeling in the ten minutes after a shower is the one most customers report first.
Two showers a day, or hard water where you live, and it is closer to two months. Note the date when you swap.
Same cartridge, same three stages
- 1Calcium sulfite
Neutralizes chlorine and chloramines at full shower temperature, where single stage carbon quits.
- 2KDF-55
Captures the lead, copper and nickel your pipes add on the last few metres.
- 3Activated coconut carbon
Takes out what is left and brings the water back to a pH your barrier tolerates.
This is the identical cartridge that shipped inside your shower head. No new version, no compatibility to check.
Swapping it
Unscrew the shower head from the arm by hand. No wrench, no plumber.
It sits loose inside the housing. Pull it out and throw it away with your normal waste.
Mesh side up, screw the head back on, run the water for thirty seconds. Done.
Where it sits
The cartridge is the only part that wears out. The head itself, the chrome and the face plate stay. That is why the refill is $35 and not another $149.
Questions
Does this fit the shower head I already have?
Yes. There is one Roselyn shower head and one cartridge for it, in Modern Chrome and in Jet Black alike. Nothing has been revised since launch, so whichever unit you own, this is the part.
How do I know mine is due?
Three months of daily showers is the working figure. Two people using it, two showers a day, or hard water where you live, and it is closer to two months. The reliable signals are the chlorine smell coming back into the steam and the tight feeling on your skin afterwards.
What happens if I leave the old one in?
Nothing dramatic. The water is not dirtier than it was before you had a filter, you simply stop getting the benefit, and the flow drops off as the media compacts.
Can I rinse it out and reuse it?
No. The calcium sulfite is consumed by the reaction with chlorine, and the KDF and carbon hold what they captured. Rinsing washes off the surface and changes nothing about the exhausted media inside.
Is there a subscription?
No. You order when yours is due. That is also why some people take two or four at once and keep the spares in the cupboard.
Do I get the 100 day guarantee on a refill too?
Yes, same terms as the shower head. If it does not do what it should, email us and we send your money back.