a comparison of different Shower filters

Why people choose in-line over shower-head filters

If you came here looking for a shower-head filter to deal with hard water (the limescale on the glass, the things it does to your skin and hair), there's a different filter worth knowing about first. Five reasons it tends to win, once people see the difference.
A shower-head filter that replaces the shower head
Shower-head filters Replaces your complete shower head
Being installed between the wall fitting and the hose
In-line shower filters Works with your current shower head
The 5 reasons Shower-head filters In-line filters
01 Filtration quality Thin media, short contact, packed tight Deeper bed, longer contact, full pressure
02 Keep your custom fixtures Replaces your shower head Keep the one you already have
03 Save money Usually about double the price Lower initial costs
04 Installation Replace the whole shower head 60 seconds, no tools
05 Take it with you Usually stays with the shower Comes off when you want to

The five reasons, in depth

REASON 01

The filtration is genuinely better

This is the reason most people don't see coming. A shower-head filter has to fit everything inside the head itself. And there isn't much room in a shower head. An in-line filter doesn't have that limit. Three things happen because of it:

More contact time.

✓ An in-line cartridge is physically deeper, so water has to travel through a thicker bed of filtration material. That extra time is what lets media like KDF-55 actually do its job and neutralise chlorine, rather than racing past too little material, too fast.

More filtering stages
× A small shower-head filter usually has space for one or two thin layers of media.

✓ A larger in-line housing has the room to stack many more distinct stages, each targeting a different part of the water. More layers, more things filtered.

Water pressure that doesn't suffer.
× To squeeze decent filtration into a shower-head filter, the media has to be packed incredibly tight, which can choke your flow.

✓ An in-line filter spreads the water across a wider surface area inside the cartridge. You get the deeper filtration and the pressure you're used to.

REASON 02

Keep your custom fixtures

A shower-head filter gives you the spray settings and design that come with the filter. That's it. If you already love your high-pressure head, your rainfall head, or your handheld, a shower-head filter asks you to give that up.

An in-line filter doesn't. It sits between the wall and your existing hose, so whatever shower head you've chosen stays exactly where it is. You're adding filtration to the setup you already like, not replacing it with someone else's design.

REASON 03

Save on the initial purchase

A shower-head filter is usually about double the price of an in-line filter. You're paying for the housing, the spray plate, the design, and the filtration all bundled into one unit. With an in-line filter, you're only paying for the part that does the filtering. The shower head you already own does the rest.

REASON 04

Super easy to install

About 60 seconds. No tools. Hose off, in-line filter on, hose back on, hand-tighten. No plumber, no replumbing, no mounting anything to the wall. If you can change a shower hose, you can install this and if you've never changed a shower hose, you'll still manage it the first time.

REASON 05

Easier to take with you

A shower-head filter is part of the shower it's installed on. When you move, it stays. An in-line filter comes off as easily as it went on, so it moves with you to the next place.

The same goes for longer stays away from home: you can bring it with you, even though if travel is the main use case, a dedicated travel shower filter is lighter and more compact for that specific job.

A few honest answers, before you decide

Will an in-line filter slow down my water pressure?

It's a fair thing to wonder about, because water does have to pass through more material in an in-line filter than in a shower-head one. The reason it works anyway is geometry. A larger housing spreads the water across a wider surface area inside the cartridge, instead of forcing it through media packed tight into a shower head. You get the deeper filtration without choking the flow, so in normal household use, you shouldn't feel a difference.

Will it fit my shower?

If your shower has a standard hose-and-head setup, yes. In-line filters install between the wall fitting and the hose, using the same connection that's already there. That covers the vast majority of EU showers, including rainfall, handheld and high-pressure heads. If you have a fully wall-mounted shower with no hose at all, get in touch before you get one and we'll help you check.

Do I have to give up my current shower head?

No, and that's a lot of the point. A shower-head filter replaces what you've got. An in-line filter adds to it. If you've spent real money on a head you love, or you just like the spray pattern you already have, none of that has to change. You're adding filtration to your existing shower, not swapping it for someone else's design.

What happens when I move? Can I take it with me?

Yes, easily. It comes off the same way it went on. Takes about 60 seconds, no tools, so when you move, your filter moves with you. A shower-head filter usually stays behind with the shower it's installed on. For longer trips and travel specifically, our dedicated travel shower filter is lighter and more compact for that job, but for moving house, the in-line filter is the one that comes along.

How often do I need to replace anything?

You don't replace the housing, that stays. You only refill the cartridge inside it. For a typical household that's about every three months; less often if you're showering alone, more often in a full house.

What people notice after switching

"Came for the limescale. The white film on the shower glass used to build up almost weekly and I'd basically given up on it. About a month in with NAWAH and it's noticeably less. The shower head being the same one I'd picked out a year ago was the bit I didn't expect to love."
Martin Berlin · hard-water home
"My skin used to feel really tight straight out of the shower. I just assumed that's how showers worked. It isn't, apparently. It's not dramatic, more that my skin feels calmer afterwards. I reach for body lotion because I want to, not because I have to."
Emma Rotterdam
"Pressure was the thing I was worried about. We have a rainfall head and I didn't want to lose any of it. Honestly couldn't tell the difference. Six weeks in, my hair feels easier to comb out wet and the colour from my last appointment is holding longer than usual. Same shampoo, same everything."
Isabel Frechen
NAWAH product image

The in-line filter, considered

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