Houston's Unique Plumbing Challenges for Older Apartment Buildings
Houston's combination of high water pressure, hard water, and the thermal expansion/contraction cycles caused by extreme summer heat creates accelerated wear on plumbing systems in older apartment buildings. Properties built before 1990 with original galvanized steel or polybutylene piping are particularly at risk.
Plumbing problems that seem like isolated incidents — a leak here, low pressure there — often signal systemic deterioration that will escalate into a major water damage event if not addressed proactively.
Warning Signs Your Property Needs Plumbing Evaluation
- Discolored water — Rusty or orange-tinted water from hot water lines indicates galvanized pipe corrosion from the inside
- Frequent leak calls — If maintenance is patching more than 2–3 plumbing leaks per month across the property, you're addressing symptoms, not causes
- Low water pressure complaints — Often caused by mineral buildup narrowing pipe interior diameter over decades
- Water hammer — Banging in walls when faucets are turned off can indicate deteriorating pipe connections
- Mold recurrence — Mold that returns to the same locations often has a slow leak behind walls as the source
- Insurance claim history — Multiple water damage claims in the past 5 years is a strong signal of systemic plumbing issues
Polybutylene Pipe: A Special Warning
Properties built between 1978 and 1995 may have polybutylene (PB) pipe — a grey plastic pipe that was widely used during this era before being discontinued due to a high failure rate. PB pipe doesn't fail at installation; it deteriorates over time, typically showing failures 20–30 years after installation. If your property has PB pipe, a comprehensive inspection is urgent.
The Repiping Process for Occupied Apartment Properties
Full building repiping is disruptive but manageable with proper planning:
- Water shutoff scheduling — Work is scheduled building by building. Residents receive advance notice of shutoff windows (typically 4–8 hours per working area). Evening and weekend shutoffs can be avoided with proper scheduling.
- Access coordination — Plumbers access walls through strategic penetrations, minimizing the number of openings required. Newer pipe-in-pipe replacement methods further reduce access requirements.
- Restoration work — Drywall repair, texture matching, and painting follow the plumbing work, unit by unit
- Final inspection — City inspection and pressure testing before walls are closed
PEX Piping: The Modern Standard
Virtually all multifamily repiping projects today use cross-linked polyethylene (PEX) pipe. PEX is flexible (installable with fewer connections, reducing leak points), resistant to freeze damage, and has a much lower corrosion risk than copper or galvanized steel in Houston's water chemistry. PEX has a service life of 50+ years.
Repiping Costs in Houston (2026)
Per-unit costs for a complete building repipe (hot, cold, and supply lines to all fixtures):
- Studio/1-bed units: $3,500–$6,000
- 2-bed units: $5,000–$8,500
- 3-bed units: $7,000–$12,000
These ranges assume standard slab-on-grade construction. Properties with slab plumbing that requires tunneling or rerouting through walls instead of the slab will be at the higher end of these ranges.
A 100-unit property with an average 2-bed unit size should budget $500,000–$850,000 for a complete repipe — a significant capital expenditure that can often be financed as a property improvement loan.
The Proactive Case for Repiping
A property that repipes proactively avoids the much higher cost of emergency leak repairs, water damage restoration, mold remediation, displaced resident claims, and the associated insurance impact. Properties with documented recent repiping also command a premium in sales transactions and are viewed more favorably by insurance carriers.
Tell Projects Plumbing Services
Tell Projects manages plumbing and repiping projects for Houston multifamily properties, coordinating licensed master plumbers, drywall restoration, and painting under a single contract. Call (832) 591-7991 for a plumbing assessment and project estimate.