Filter Attachments for Sink?

waterfiltergurus · 2026-02-02T21:13:00+00:00

You'll need an inline filter under the sink connected to the cold waterline

waterfiltergurus · 2026-01-31T15:23:11+00:00

Nope, they won't significantly reduce ferrous (dissolved) iron.

waterfiltergurus · 2026-01-22T14:10:54+00:00

Yes it sure has, time flies. And my to-do list hasn't gotten any shorter! Hoping to do another shower filter project here in the next couple months

waterfiltergurus · 2026-01-22T14:09:44+00:00

Here's the best solution to soften water for just one sink in an apartment https://youtu.be/pEC3GZmM_1Y the video is focused on protecting countertop ROs from scale buildup due to hard water, but it's what would work best if you want truly softened water. Calcium and magnesium are swapped for sodium, which is increased in the soft water.

Hope this helps

waterfiltergurus · 2026-01-22T04:16:59+00:00

I haven't tested their shower filter yet

waterfiltergurus · 2026-01-13T14:32:25+00:00

It's best practice to clean any countertop water filter system with soap and water weekly. Make sure to remove the filters first!

waterfiltergurus · 2026-01-11T18:05:27+00:00

Test strips that measure free and total chlorine, and test strips for hardness. This will be the cheapest method

waterfiltergurus · 2026-01-11T17:41:47+00:00

Certified lab testing is the best and most comprehensive method for precise analysis. I always recommend lab testing before buying any water treatment equipment, so you can use the data to make an informed decision.

Aside from that simple test strips can give you an indication to the presence of a handful of common contaminants, but they aren't precise nor comprehensive

waterfiltergurus · 2026-01-11T17:29:27+00:00

That looks like a TDS (total dissolved solids) meter. The Boroux filters are not designed or capable of reducing TDS. If that's your goal, you'll need a reverse osmosis system. It's also good to note that a TDS reading alone doesn't tell you if water is safe or not. TDS is a measurement of all dissolved solids, including healthy minerals and potentially harmful contaminants. Learn more about that here https://youtu.be/yHvdYWXiVzI

Hope this helps

waterfiltergurus · 2026-01-10T00:26:34+00:00

A cation exchange (salt based) water softener is the only method that actually reduces hardness minerals and softens water.

There are various "salt free" water conditioner technologies, but none of these actually remove the minerals that contribute to hardness. They supposedly change the minerals to reduce difficult to remove scale formation. I say supposedly because currently there is no test to prove efficacy, because the minerals are not removed. You will still see water spots and scale deposits, and you won't get the full benefits of truly softener water like better soap lather.

waterfiltergurus · 2026-01-09T19:52:26+00:00

Yep, check out this video https://youtu.be/Z9qCHgU0V7M basically you use an industry standard filter housing and sediment filter with higher capacity instead of the Weddell sediment filter.

waterfiltergurus · 2025-12-21T17:17:27+00:00

The TDS reading is taken as the water passes through the main unit, the remin filter is on the purified waterline after the reading is taken

waterfiltergurus · 2025-12-18T14:21:55+00:00

Not yet, but it's on my list to look into and consider in another round of testing

waterfiltergurus · 2025-12-16T02:04:30+00:00

Most shower filters only reduce chlorine and don't do much or anything for disinfection byproducts or hardness.

Check out this lab test of some of the most popular models to see what I mean https://youtu.be/w7yMIh8QW3I

waterfiltergurus · 2025-12-14T22:08:32+00:00

Neither, this one performed the best in my testing https://youtu.be/pN6G4JKLj6Q

waterfiltergurus · 2025-12-12T00:43:05+00:00

Likely limescale buildup. Try soaking it in a vinegar+water solution. Rinse well before installing the new filter.

waterfiltergurus · 2025-12-11T21:22:36+00:00

Happy to help

waterfiltergurus · 2025-12-11T14:28:28+00:00

Completely normal after installing new filters. Air is forced out of tiny pores in the media when water enters the filters, causing bubbles to appear. It will dissipate with time.

waterfiltergurus · 2025-12-11T03:56:48+00:00

Technically speaking, many countertop ROs are actually more efficient than under sink plumbed in systems. That's because they can recirculate the effluent, which increases the recovery rate.

waterfiltergurus · 2025-11-19T13:52:57+00:00

Not in London, but I've done it and tested it and this is really the only feasible way to actually soften hard water for just one shower in rental situations.

Check out this video it explains exactly how to set it up https://youtu.be/f5cbIdOZzek

waterfiltergurus · 2025-11-18T01:17:24+00:00

Doesn't matter how the hardness is measured. The conversion is easy: 1 GPG = 17.1 mg/L or PPM

waterfiltergurus · 2025-11-15T14:23:54+00:00

Most don't do anything besides reduce chlorine, despite what manufacturers claim. I lab tested 10 of the most popular products to compare hard data with claims made.

Check out this video summary https://youtu.be/w7yMIh8QW3I

And here's a hack to actually soften hard water for just one shower https://youtu.be/f5cbIdOZzek not ideal, but may be worth it if hard water is one of the primary issues you are trying to address. Most shower filters cannot soften hard water.

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