01RO tackles dissolved solids
Every Velta purifier uses RO to reduce dissolved solids that carbon filtration alone cannot.
Reverse osmosis water purifiers
Reverse osmosisin every Velta purifier.
Every Velta purifier uses RO for finer filtration than carbon alone. Built-in TDS readings let you check performance, while filter-life reminders tell you when upkeep is due.
- RO purifiers
- 3 models
- Water reading
- TDS built in
- Filter reminder
- On the purifier
Filtration and upkeep
RO filtration, TDS readings and filter reminders.
RO reduces dissolved solids that carbon alone cannot. The TDS reading shows it is working, and filter reminders tell you when a change is due.
01
02Check the TDS reading
A built-in TDS reading lets you check how the RO stage is doing, right on the purifier.
03Know when to change the filter
Each purifier shows filter life and tells you when a cartridge is due.
Compare the three purifiers
Choose by the water you want and where it goes.
The right model depends on the water you want—sparkling, hot and cold, or ambient—and whether it belongs on the counter or under the sink.
Countertop · sparkling, hot and cold
01
HydroSpark+
RO-filtered sparkling, cold, ambient and hot water.
Sediment · pre-carbon · RO · post-carbon
Countertop · hot and cold
02
HydroForm+
Plumbed-in hot, cold and ambient RO water.
PAC composite · RO + ACF · outlet UVC
Under-sink · clear worktop
03
HydroView+
Ambient RO drinking water, plus a second filtered outlet for rinsing.
Composite pre-filter · RO · post-carbon
How the filtration stages work
From the inlet to your glass.
Pre-filters prepare the incoming water, the RO membrane separates out dissolved solids, and a final stage suited to each model treats the water before it is poured. The purifier also shows when a filter change is due.
01
Prepare
Pre-treatment
Sediment and carbon stages catch suspended particles, improve taste and help protect the RO membrane before separation begins.
02
Separate
Reverse osmosis
Pressure pushes water through the RO membrane, leaving dissolved solids behind in a reject stream that goes to the drain.
03
Finish
Model-specific final stage
Depending on the purifier, a post-carbon, activated-carbon fibre or UV stage gives the water its final polish before it is poured.
04
Monitor
Filter status and care
The TDS reading shows how the RO stage is doing, and the filter-life display tells you when a cartridge is due.
Filters and membranes
The filter cartridges in each purifier.
All three Velta purifiers use reverse osmosis, but each has its own cartridges and replacement schedule.
4-in-1 composite cartridge
HydroSpark+
Sediment · carbon · RO membrane · post-carbon
One cartridge does it all: pre-filters the water, runs it through the RO membrane and polishes the taste.
- Replacement schedule
- 4,000 L / 24 months
One replacement filter
HydroForm+
PAC composite · RO membrane + ACF · outlet UVC
Pre-filtration prepares the water before the RO membrane and carbon-fibre stages, followed by UV at the outlet.
- Replacement schedule
- Follow the filter-life reminder
CF + RO cartridges
HydroView+
Composite pre-filter · RO membrane · post-carbon
The composite filter pre-treats the water before it reaches the RO cartridge.
- Replacement schedule
- CF 4,000 L / 12 months · RO 8,000 L / 24 months
Change each cartridge when the purifier reminds you, or at its litre or time limit, whichever comes first.
How to tell your purifier is workingWhy reverse osmosis
What reverse osmosis reduces.
RO reduces dissolved solids that carbon alone cannot. The surrounding stages catch particles, improve taste and finish the water.
Physical particles
01
Tiny particles, filtered out
Membrane filtration creates a fine physical barrier for suspended particles and microscopic matter, including microplastics.
Dissolved solids
02
Lower dissolved solids
RO reduces dissolved salts and TDS. It can also reduce selected metals, where a test on the specific system shows it.
Persistent chemicals
03
Helps reduce PFAS
PFAS—per- and polyfluoroalkyl substances—are persistent synthetic chemicals often called “forever chemicals”. The US EPA lists point-of-use RO among the technologies that reduce certain PFAS compounds.
Taste profile
04
Better taste and smell
Activated carbon reduces chlorine-related taste and odour for cleaner-tasting water.
Filters, warranty and service
Filter replacement and service access.
Your purifier lets you know when a filter is due. Replacement cartridges and local support come from Velta Singapore.
Reverse osmosis research
Research on reverse osmosis treatment.
Reverse osmosis is a well-established treatment technology. Read the independent sources about the treatment methods used in the Velta purifier range.
Read the sources+
01How reverse osmosis worksUS Environmental Protection Agency02Point-of-use RO capabilitiesUS EPA WaterSense03PFAS treatment with point-of-use filtersUS Environmental Protection Agency04Filter types, pore size and chemical reductionUS Centers for Disease Control and Prevention05Microplastics and point-of-use membrane filtrationCherian et al., Polymers (2023)
Frequently asked questions
Choosing a Velta RO water purifier.
01Why does Velta use reverse osmosis in every purifier?
+
RO can reduce a broader range of dissolved substances than sediment and carbon filtration alone. Velta pairs it with pre-filters that protect the membrane and a final stage that refines the water.
02How can I see my purifier working?
+
Check the TDS reading on the purifier: it is a quick view of how the RO stage is doing. HydroSpark+ shows one value in settings, HydroForm+ shows it live on screen, and HydroView+ shows water-in and water-out TDS on the faucet.
03Which Velta water purifier should I choose?
+
Choose HydroSpark+ for sparkling, cold, ambient and hot water. Choose HydroForm+ for plumbed-in hot, cold and ambient water. Choose HydroView+ if you want ambient RO water and a clear worktop.
04Do all three Velta purifiers use the same filters?
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No. All three use reverse osmosis, but their cartridges and final stages differ. Each model has its own filters, replacement schedule and water modes.
05What does the 0.0001 µm figure mean?
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It is the manufacturer’s nominal pore scale for the reverse-osmosis membrane used across the Velta range, a way of describing how fine the membrane is.
06Does reverse osmosis remove everything from water?
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No single filter removes everything. RO reduces a broad range of dissolved substances, while the sediment, carbon and final stages handle the rest.
07How do I maintain a Velta water purifier?
+
Change cartridges when the purifier reminds you, or when they reach their litre or time limit, whichever comes first. That keeps every stage doing its job.
Compare Velta
Choose your Velta RO water purifier.
Compare sparkling, hot-and-cold and under-sink purifiers by the water they pour, installation, filters and price.