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Engineering Case Studies

Real Problems. Scientific Solutions.

Every case below is a real Maryland job. Real homeowners, real infrastructure failures, real engineering solutions grounded in IAPMO, ASTM, and NFPA standards.

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All Case Studies

Repiping
Lead Remediation

Historic Federal Hill Home — Complete Repipe

Baltimore, MD · 3 Days
The Challenge

A 1920s Federal Hill row home with 100% galvanized steel pipes. Internal corrosion had reduced water pressure by 70% and was leaching lead into the supply.

Our Solution

Full 3-day PEX repipe. Acoustic mapping identified 14 branch points without opening walls unnecessarily. All fixtures retained original positions. Lead test: clear on day 4.

+310%
$0 ongoing
72hrs
IAPMO UPC §604 · ASTM B88 copper / ASTM F876 PEX
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Slab Leak Repair
Commercial

Silver Spring Office Complex — Slab Leak

Silver Spring, MD · 1 Day
The Challenge

A 4,000 sq ft commercial office building with an undetected slab leak causing $2,800/month in unexplained water costs for 6 months before detection.

Our Solution

Acoustic leak detection pinpointed the fracture to within 6 inches. Targeted concrete core drill — 14" diameter access. HDPE liner epoxy repair. No business closure required.

$2,800/mo
Saved $33,600/yr
9hrs
IAPMO UPC §604 · ASTM F1216 trenchless lining
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Emergency Plumber
Emergency 3AM

Columbia Townhome — 3AM Burst Pipe

Columbia, MD · 2 Hours
The Challenge

Homeowner woke to 2 inches of water in basement at 3:17 AM. Copper supply line failed at an elbow joint due to freeze-cycle fatigue. Water main shut-off seized.

Our Solution

Dispatch in 18 minutes. Froze the pipe segment with CO2 sleeve to isolate without main shut-off. Replaced 6ft copper run with PEX barrier tubing. Restored water by 5:30 AM.

18 min
Basement saved
2hrs
ASTM B88 copper · ASTM F876 PEX · IAPMO UPC §604
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Trenchless Sewer Repair
Historic District

Annapolis Historic District — Trenchless Sewer

Annapolis, MD · 1 Day
The Challenge

A 1940s clay sewer lateral with 60% root intrusion and partial collapse. Traditional open-cut excavation would have destroyed a protected historic brick courtyard.

Our Solution

CIPP (Cured-In-Place Pipe) lining. Hydro-jetting cleared the line, video confirmed collapse zone, 8" felt liner installed and UV-cured in 4 hours. Zero courtyard disturbance.

100%
Courtyard intact
1 day
ASTM F1216 CIPP · IAPMO UPC §717 trenchless methods
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Water Heater Installation
Commercial Kitchen

Germantown Restaurant — Water Heater Cascade

Germantown, MD · 1 Day
The Challenge

A 60-seat restaurant with failing 80-gallon tank units causing inconsistent hot water during peak service hours. Health department inspection pending.

Our Solution

Installed 2× Navien NCB-240 tankless condensing units in cascade. Separate low-pressure recirculation loop for instant hot water. Passed health inspection day of install.

Unlimited
34% energy cut
8hrs
IAPMO UPC §501 · ASHRAE / Navien performance specs
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Gas Line Installation
Safety Critical

Bethesda Renovation — Gas Line Safety Audit

Bethesda, MD · 1 Day
The Challenge

Homeowner discovered unlicensed gas work during a kitchen renovation — 3 connections without pressure testing, improper CSST bonding, and a flex connector past its service life.

Our Solution

Full gas line audit per NFPA 54. Replaced all 3 suspect connections with black iron. Installed equipotential bonding per NFPA 70. Pressure-tested at 1.5× working pressure. Safety certificate issued.

0 leaks
Explosion prevented
6hrs
NFPA 54 (ANSI Z223.1) · NFPA 70 NEC bonding
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