Plumbing Engineering

Services

At G+R Engineering, we design plumbing systems that are reliable, code-compliant, and practical to install and maintain. We work closely with each client and the broader design team to understand the building’s needs, identify coordination issues early, and develop solutions that perform well in the field.

Our plumbing engineering services support residential and commercial projects ranging from ADUs and tenant improvements to multifamily and mixed-use developments. We design domestic water, hot water, sanitary waste and vent, storm drainage, natural gas, and other project-specific plumbing systems with a focus on efficient operation, constructability, and long-term reliability.

Throughout the design process, we coordinate with architects, structural engineers, contractors, and other MEP disciplines to establish piping routes, equipment locations, access requirements, and system sizing. This level of coordination helps reduce conflicts, RFIs, and costly revisions during construction. The result is a clear, permit-ready plumbing package that contractors can build from with confidence and owners can depend on for years to come.

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Domestic water & hot water systems

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Sanitary waste & vent systems

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Storm drainage systems

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Natural gas piping systems

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Piping routes & system sizing

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MEP coordination & constructability

Plumbing Engineering that Keeps Your Building Flowing

Code-Compliant Water, Drainage & Fire Protection Design for Residential & Commercial Projects

Other Featured Projects

A selection of commercial and residential projects where our plumbing and engineering support covered water distribution, drainage, fire protection, and utility coordination from concept through permit.

Transpark Office Tenant Improvement

Ontario, CA | 2024

Luxe Laundromat

Los Angeles, CA | 2024

Electrical System Design for Long Beach Salon Suites

Long Beach, CA | 2024

9405 Winderemere ADU - Title 24 Energy Performance Compliance Report

Phelan, CA | 2024

13176 Navajo - Title 24 Residential Performance Energy Compliance

Apple Valley, CA | 2024

12562 Spinnaker St - Accessory Dwelling Unit

Garden Grove, CA | 2024

11735 Courtleigh Apartment Building - Plumbing System & Fixture Additions

Cerritos, CA | 2024

9405 Winderemere ADU - Title 24 Energy Performance Compliance Report

Phelan, CA | 2024

LET’S TALK ABOUT YOUR PROJECTS

PLUMBING ENGINEERING DESIGN & CONSULTING SERVICES

Expert plumbing system design and engineering solutions for residential,
commercial, and industrial projects.

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