Description
An alkaline RO water filter gives you the purity of reverse osmosis with a mineral stage that adds calcium and magnesium back into the water and raises the pH. Our 7-stage 50 GPD under-sink system suits apartments and villas in Oman, and the 8-stage version adds a UV sterilizer for extra protection.
Groundwater and tanker water in Oman often run 500 to 2,000 ppm TDS. Reverse osmosis brings that down to drinking-water quality, but pure RO water can taste flat. The alkaline RO water filter fixes taste by remineralising after the membrane, so the family drinks more water and stops buying bottles.
Features of the alkaline RO water filter
- Stage 1 – 5 micron sediment filter removes sand, rust and silt
- Stage 2 and 3 – GAC and CTO carbon remove chlorine, taste and odour
- Stage 4 – RO membrane reduces TDS, hardness, nitrates and heavy metals
- Stage 5 – inline post-carbon polishes taste
- Stage 6 and 7 – alkaline mineral cartridge adds calcium and magnesium
- 8-stage option – UV sterilizer for bacteria and virus control
- Pressurised storage tank and chrome faucet included
Technical specifications of the alkaline RO water filter
| Capacity | 50 GPD (approx. 190 L/day) |
| Stages | 7 (alkaline) or 8 (alkaline + UV) |
| Membrane | 50 GPD TFC RO membrane |
| Storage tank | Approx. 8–12 L (3.2 gallon) pressure tank |
| Feed water TDS | Up to 2,000 ppm |
| Operating pressure | 40–100 psi (booster pump models for low pressure) |
| Power | 24 V DC adapter (pump and UV models) |
| Installation | Under the kitchen sink |
Applications
Kitchens in apartments, villas and small offices across Muscat and Oman. Use the alkaline RO water filter for drinking, cooking, tea and coffee, baby formula and pet water.
Maintenance and replacement
Change sediment and carbon cartridges every 6 months, the post-carbon and mineral cartridge every 12 months and the RO membrane every 2 to 3 years. The UV lamp on 8-stage units is changed yearly. Our annual service contracts cover all of this.
Related products
Prefer a simpler unit? See our 5-stage under-sink RO water filter and 6-stage under-sink RO water filter. Keep it running with an RO filter AMC. For reference standards, see the WHO Guidelines for Drinking-water Quality.
Why buy the alkaline RO water filter from UV Water Systems
UV Water Systems (Uniqueness View LLC) has supplied and serviced water treatment equipment in Oman for over 14 years and is ISO 9001:2015 certified. We supply genuine products, keep common consumables in stock in Muscat, and our own technicians handle installation, commissioning and after-sales service. Restaurants, hotels, hospitals, schools, oil and gas sites and homeowners across the Sultanate rely on us for correct sizing advice and fast response.
Get a price for the alkaline RO water filter
Prices depend on quantity and site requirements. Call or WhatsApp +968 9763 7786 or email sales@uvwater.biz and we will send a quotation the same day, with delivery and installation available in Muscat and across Oman.

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