Installation Guide
Tankless Water Heater Installation Cost
The cost depends on your existing gas line and venting, the upgrades your home needs, and the size of unit that fits your family. Every home is different, so we give you exact options at your Free Home Visit.
Unlike water filtration systems where we know all the variables upfront, tankless installation depends on factors unique to your home:
- Your existing gas line size and distance from meter
- Venting path complexity and length
- Unit size needed based on your peak hot water demand
- Installation location and accessibility
- Building code requirements for your area
We don't believe in giving blanket pricing that would overcharge some customers and undercharge others. A free in-home assessment ensures you get accurate pricing for YOUR home.
Family-Owned, Affordable Pricing
As a local, family-owned business without large corporate overhead, we pride ourselves on an affordable pricing structure that makes quality plumbing solutions accessible to everyone. If price is still a concern, we offer financing options that can significantly reduce your monthly investment.
What's Included in Will's Friends Installation
When you choose Will's Friends, here's exactly what we do—no shortcuts, no surprises.
We evaluate your fixtures, calculate peak demand, inspect infrastructure, and provide a detailed quote with everything included.
We drain, disconnect, and haul away your old tank water heater. No mess left behind.
Gas line upsizing and venting prep by our licensed plumbers, plus any new outlet by our licensed electrical subcontractor. All done to code.
Wall mounting, water connections, gas connections, and venting by our licensed plumbers.
Testing, temperature setting, leak checks, performance verification, and owner training.
Installation Day: Step-by-Step Process
MorningPreparation & Removal
- • Arrive on time (30-minute text heads-up)
- • Lay drop cloths and floor protection
- • Shut off water, gas, and power
- • Drain and disconnect old tank
- • Remove old tank and venting (haul-away included)
Mid-DayInfrastructure Upgrades
- • Gas line upsizing if needed (pressure-tested)
- • New outlet if needed, by our licensed electrical subcontractor
- • PVC venting installation with proper slope
- • All work done to code specifications
AfternoonTankless Installation
- • Mount tankless unit on wall studs
- • Connect water inlet/outlet with shutoff valves
- • Connect gas line with shutoff and sediment trap
- • Connect vent pipes with proper seals
- • Connect electrical power
- • Install recirculation if equipped
Late AfternoonCommissioning & Training
- • Fill system and purge air
- • Power on and set temperature
- • Test multiple fixtures simultaneously
- • Check for leaks (water and gas)
- • Verify venting draft and condensate drainage
- • Train you on operation and maintenance
- • Clean work area completely
Nashville-Area Installation Considerations
Pre-1980:
Likely 1/2\" gas lines need upsizing
1980-2010:
Often tankless-ready with minor upgrades
Post-2010:
Usually tankless-ready infrastructure
Nashville: ~100.5 mg/L hardness
- • Annual descaling required
- • Sediment filter recommended
- • Water softener optional but beneficial
55-60°F year-round average
- • 62-65°F temperature rise needed
- • Better than northern states
- • Smaller units work efficiently
Installation Cost: Your Questions Answered
Ready for Your Free Quote?
Schedule a free in-home assessment. We'll evaluate your home, calculate exact costs, and provide transparent pricing with no pressure.