Engineering
RPEQ Engineering for Water, Wastewater and Chemical Treatment
Engineering assessment, treatment process design and dosing-system support for councils, consultants, contractors and industrial operators. Our in-house RPEQ capability supports work within professional competency and an agreed scope; not every product or service is automatically RPEQ-certified.
Who this is for
Design consultants, asset engineers and maintenance managers
Your operating priority
Resolve gaps between process design, installed equipment and day-to-day operating performance.
Before you specify or buy
Bring drawings, operating data and known faults. Agree the engineering review, maintenance responsibilities and any RPEQ certification scope before work starts.
Critical Elixirs field work
Product samples, field equipment and testing
Real product samples, sampling, measurement and dosing equipment. Photographs document the work shown; quantified outcomes require the relevant sampling context, method and records.
pH and oxidation-reduction potential (ORP) measurements help interpret water conditions alongside sampling and calibration records. 
Sampling at an access opening. Inspection and trace-testing scope must include safe access and agreed sample locations. 
A field dosing installation. Equipment configuration and operating settings are confirmed against the duty.
What is covered
- Treatment process assessment and chemical dosing system design: injection location, mixing, control and monitoring.
- Equipment selection, technical specifications and chemical storage and handling assessments within the agreed scope.
- Commissioning, calibration, performance verification and treatment optimisation.
- Engineering calculations, technical reports and agreed certification deliverables within professional competency.
- Corrosion risk and infrastructure lifecycle assessment informed by available condition and operating evidence.
What we will ask you
- What the system is meant to achieve
- What is currently installed
- Who operates and maintains it
- Where performance is falling short
This page is information only. Pricing, availability and specifications are provided through an enquiry.
Straight answers
Frequently asked questions
- Can a design consultant obtain RPEQ support for a treatment or dosing system?
- Critical Elixirs can scope in-house RPEQ support for treatment and dosing work. Provide drawings, design assumptions, approval conditions and operating data. Agree the review and any certification deliverables explicitly; engineering support does not automatically certify every component or replace the project designer’s responsibilities.