Majestic 400 RO
High-output reverse osmosis for hotels and catering: up to 400 L/h from four 500 GPD membranes, 92–95% rejection and 50% recovery, in a 30.1 kg AISI 304 stainless case with app monitoring.

What it does.
- Up to 400 L/h of purified water from 4 × 500 GPD membranes
- Hygienic AISI 304 stainless-steel cabinet
- 92 to 95% rejection rate with 50% recovery
- Carbon cartridge pre-filtration (FC500 type) protects the membranes
- Onboard display plus connected-app monitoring
- Quiet operation for front- and back-of-house
Typical applications
Majestic 400 RO in Oman
Big hotels and catering kitchens in Oman use purified water for ice, drinks and cooking all day. The Majestic 400 delivers up to 400 L/h and rejects 92 to 95% of dissolved salts, which matters most on hard inland water.
An FC500 carbon cartridge removes tank taste and shields the four membranes. You can follow how it is running on the display or in the app, and our partner team keeps it on a service plan.
Common questions
How much water goes to drain?
Half. It recovers 50%, so for every litre of purified water, another litre carries the rejected salts away.
What pump drives it?
An external rotary vane pump on 220 V, rated at 500 W.
How large is it?
220 × 550 × 440 mm, so it takes little floor space.
Specified, installed and looked after anywhere in Oman
Coastal mains water is mostly desalinated seawater. It is soft, but it picks things up in pipes and tanks. Inland wells can be very hard: one 2024 study of Al Dhahirah groundwater found an average hardness of 659 mg/l.
Say which governorate you are in, whether the water comes from the Nama network, a tank or a well, and what you need it for. We design the system, price it in rials and arrange the fit.
Source: Nama Water Services; Al Dhahirah groundwater study, International Journal of Environmental Analytical Chemistry (2024).
Interested in the Majestic 400 RO?
Tell us your setup and we'll specify, supply, install and service the right configuration for your site.
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