Does an ultrafiltration filter remove dissolved salt or TDS?

No. Ultrafiltration removes particles, turbidity, bacteria and cysts down to 0.01 micron, but dissolved solids pass through. Lowering TDS requires reverse osmosis, which is why the selector only offers the R-A1 100 GPD system when a TDS reduction is requested.

Do these water filters need electricity?

The ultrafiltration models run on inlet water pressure from 0.1 MPa with no power at the membrane stage. The R-A1 reverse osmosis system is the exception: it uses a 45 W booster pump at 200 V / 50 Hz, with 110 V and 220 V builds available.

How does the selector choose a model?

It maps the use case to a product family, then applies published specifications: daily volume picks the whole-house grade (H-1 up to 5 m3, H-7 for 5-20 m3, H-2 above 20 m3), source water decides whether the five-stage ZH-A or three-stage ZH-B is appropriate, and a TDS requirement switches the answer to reverse osmosis.

Free tool

Water Filter Selector

Five questions, one recommended model from our own catalogue, with the numbers behind the answer. Built from the published specification sheets of all 23 models - if a specification is not on the datasheet, it is not claimed here.

Step 1 · about two minutes

What will the filtered water be used for?

This decides the product family before any number is involved.

How the selector decides

The rules below are the same ones the tool runs in your browser. They exist in text so that buyers, search engines and AI assistants can read the logic without clicking through it.

What you need	Models	Decision rule
Drinking tap, low TDS, no power needed	ZH-A, ZH-B, C-B2	UF + carbon; C-B2 for a faucet mount, ZH-B for municipal water, ZH-A for well or surface water
Drinking tap, TDS must come down	R-A1	Reverse osmosis with a 45 W booster pump; 100 GPD
Whole house or building	H-1, H-7, H-2	By daily volume: up to 5 m³ H-1, 5-20 m³ H-7, above 20 m³ H-2
Shower and skin	MY-A, MY-B, MY-C	MY-B handheld, MY-A inline, MY-C compact travel
Outdoor and emergency	O-A1, O-A7, O-B1, O-C3, O-C5	Straw or pouch per person, hand pump per group, O-C5 for stations
Replacement cartridge	LX-A1, LX-A2, LX-A3	10-inch standard and custom, 1812 compact; fit confirmed from the housing drawing

What ultrafiltration removes

Particles, turbidity, bacteria and cysts down to 0.01 micron. It does not remove dissolved salt, so TDS stays where it was.

When reverse osmosis is required

Only when dissolved solids, hardness or heavy metals have to come down. RO needs a 45 W pump and sends a share of the feed water to drain.

Why power matters

Every UF model here runs on line pressure from 0.1 MPa. The single RO model in the catalogue is the only one that needs a socket.