CA License #1037326|Bonded & insured|Office Mon–Fri 7:00 AM – 5:00 PM · Emergency line answered 24/7
contact@dasoplumbing.com
DASO PLUMBINGResidential & Commercial
Electrification & Master Plumbing • Palo Alto, CA

Palo Alto Heat Pump Water Heaters & ADU Plumbing

Specialized plumbing engineered for Palo Alto's all-electric reach codes and architectural innovation. We install City of Palo Alto Utilities (CPAU) rebate-compliant hybrid heat pump water heaters, detached ADU utility tie-ins, and luxury custom remodels.

Daso Plumbing work in Palo Alto, CA
Ejector Pump Basin · Palo Alto, CA
Dual submersible grinder pumps
Licensed C-36
CA #1037326, active standing
Bonded & insured
Commercial and residential coverage
Written prices
Fixed scope and price before work starts
Photo-documented
Every diagnostic and repair logged
Palo Alto · local conditions

Navigating Palo Alto's Decarbonization & Building Standards

Palo Alto leads California in environmental sustainability and municipal reach codes. Under the City of Palo Alto Utilities (CPAU) decarbonization roadmap, homeowners are encouraged to replace fossil-fuel gas water heaters with ultra-efficient hybrid heat pump water heaters , supported by generous municipal rebates.

Additionally, Palo Alto's boom in detached Accessory Dwelling Units (ADUs) requires complex underground sewer lateral extensions, sub-metered water loops, and clean copper distribution. Daso Plumbing coordinates every phase—from permit approvals and rebate paperwork to flawless master plumbing execution.

Electric Utility
City of Palo Alto Utilities (CPAU)
Rebate Program
Up to $2,700+ Heat Pump Incentives
Top Construction
Detached ADUs & Major Remodels
Heritage Protection
Trenchless Pipe Bursting (Tree Roots)

All services →

What goes wrong here

Unique Plumbing Challenges in Palo Alto

Balancing historic preservation with modern all-electric energy mandates.

Gas-to-Electric Upgrades

Converting gas water heaters to heat pumps requires proper 240V circuit sizing, condensate drain routing, and sound dampening.

ADU Utility Capacity

Adding an accessory dwelling unit demands precise calculation of main water meter capacity, fixture units, and sewer lateral fall.

Historic Pipe Deterioration

Professorville and Old Palo Alto homes suffer from rust-choked galvanized lines and brittle clay sewer laterals infiltrated by heritage oaks.

Luxury Bath Pressurization

Custom multi-valve showers require dedicated copper loop headers to prevent temperature drops when other household fixtures run.

Our work

Work we've done in Palo Alto.

Real systems installed by Daso crews on Peninsula properties.

Dual Sump & Ejector Basin — Palo Alto, CA
Palo Alto, CA
Dual Sump & Ejector Basin
Submersible dual sewage ejector pumps cast in fresh concrete basement slab.
All-Electric Heat Pump Conversion — Palo Alto, CA
Palo Alto, CA
All-Electric Heat Pump Conversion
High-efficiency hybrid heat pump installation meeting Palo Alto reach codes.
Campus Bottle Station Installation — Palo Alto, CA
Palo Alto, CA
Campus Bottle Station Installation
Bi-level architectural drinking fountain and sensor bottle filling station.
Specialised for Palo Alto

What we're usually called in for here.

01

CPAU Heat Pump Upgrades

Complete turnkey gas-to-electric heat pump conversions. We handle unit sizing, condensate drainage, sound isolation, and all municipal permit documentation.

  • Maximizes City of Palo Alto rebates
  • Title 24 energy compliance
  • Same-day emergency replacements
02

Detached ADU Plumbing

Full underground trenching and tie-in connections for accessory dwelling units. We engineer sanitary sewer lines, secondary water submeters, and gas/electric distribution.

  • City of Palo Alto ADU standards
  • Gravity sewer & ejector pump systems
  • Architectural plan review coordination
03

Trenchless Sewer Replacement

Replace failing clay or cast-iron sewer laterals without destroying Palo Alto's protected heritage trees, brick driveways, or mature landscaping.

  • High-definition video camera inspection
  • Hydraulic pipe bursting technology
  • Root-proof seamless HDPE piping
FAQ

Palo Alto plumbing questions

How do I qualify for City of Palo Alto Utilities (CPAU) heat pump rebates?
To qualify for CPAU heat pump water heater rebates (often up to $2,700 or more), the equipment must meet strict Efficiency Rating (UEF) standards, be installed by a licensed plumbing contractor, and pass City building inspections. Daso Plumbing ensures all selected models comply with CPAU guidelines and assists with the rebate application process.
What are the plumbing sizing requirements for detached ADUs in Palo Alto?
Detached ADUs require an assessment of the existing main water service line diameter (often requiring an upgrade to 1" or 1.25" copper to satisfy California Plumbing Code water fixture units). The sanitary sewer lateral must maintain a minimum 1/4" per foot slope to the main tie-in, or utilize an engineered sewage ejector basin if gravity fall is not achievable.
Can you repipe historic Professorville homes without destroying walls?
Yes! In historic homes with original lath and plaster walls, we utilize flexible Uponor PEX-A piping routed through attics, crawlspaces, and interior closets with minimal drywall openings. This preserves vintage woodwork, historic moldings, and delicate plaster finishes while completely restoring full water pressure.
How does trenchless sewer pipe bursting protect heritage trees?
Palo Alto has strict heritage tree preservation ordinances. Traditional open-trench digging can sever critical root structures, violating city codes. Our hydraulic trenchless pipe bursting method requires only two small access points at each end of the line, pulling seamless HDPE pipe directly through the old clay lateral without disturbing tree roots or landscaping.
Next step

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