An industrial RO plant AMC is meaningfully different from a typical "service contract" because the OpEx is dominated by membranes, chemicals, and energy — not labour. A good AMC manages those three together. A bad one charges you for visits and ignores the things that actually matter.

1. Response time SLA

For F&B plants, RO downtime usually halts production. Negotiate explicit SLAs for both routine service (e.g., 48 hours) and plant-down emergencies (e.g., 4 hours in-country). Make the SLA contractual — with documented service credits for misses.

2. Membrane management

Membranes are 40-60% of RO OpEx over time. The AMC should explicitly cover:

  • Recovery and pressure-drop monitoring — monthly trend reports
  • Chemical cleaning (CIP) cadence — typically every 3-6 months based on fouling
  • Membrane life forecasting — with proactive replacement planning
  • End-of-life replacement — included or surcharged? Get clarity upfront.

3. Chemical supply

Anti-scalant, biocide, pH adjustment, and CIP chemicals. The AMC should specify:

  • Brand and grade of each chemical
  • Whether supply is included or call-off
  • Dosing-rate review cadence

4. Spare parts and consumables

Cartridge filters, dosing-pump diaphragms, instrument calibrations, pressure-gauge replacements. Are these inclusive or pass-through?

5. Energy

RO plants are energy-hungry. A good AMC includes annual energy benchmarking with recommended optimisations — VFD tuning, high-pressure pump efficiency, recovery optimisation.

6. Documentation and audits

Monthly performance reports, annual compliance audits, regulatory documentation (KAHRAMAA, DEWA, SWCC, CPCB) — all should be inclusive.

7. ZLD economics

For plants approaching ZLD, the AMC should include feasibility framing — CapEx for evaporator-crystalliser, OpEx delta, water-cost-per-bottle calculation. Don't sign multi-year non-ZLD AMCs without ZLD pathway clarity.

Pricing benchmarks (GCC, 2026)

  • 10 m³/hr single-pass RO with UV: USD 6k–14k/year
  • 50 m³/hr two-pass RO with UV and ozonation: USD 18k–45k/year
  • 200 m³/hr multi-train high-recovery RO with ZLD provisioning: USD 90k–200k/year

Numbers vary widely with chemical scope, membrane-replacement provisioning, and response-time SLA. Compare apples to apples.

Red flags in proposed AMCs

  • "All-inclusive" without explicit list of inclusions and exclusions
  • No documented response-time SLA
  • Membrane replacement excluded but not flagged upfront
  • No monthly performance trending
  • No exit clause if performance drops