How Brothers Plumbing cut call abandonment from 30% to 5% and Superior Plumbing held an 80% booking rate: an AI voice receptionist that separates burst-pipe emergencies from routine jobs and books directly into open dispatch slots.
Evidence & Case Study Source: Verified deployments at Brothers Plumbing, Heating & Electric and Superior Plumbing (ServiceTitan AI Voice Agent case studies) + NexAI voice architecture
The business storywho it is for, what was broken, and how it runs
Who this is built for
Residential and commercial plumbing contractors (2 to 30 trucks) losing evening, weekend, and mid-day overflow calls to voicemail while techs are under a sink or in a crawlspace.
What was broken
Over 60% of high-margin emergency plumbing calls happen outside normal office hours or during Monday-morning surges. At Brothers Plumbing, nearly 30% of callers hung up before reaching a CSR, and returning missed voicemails took over 10 hours—by which time the homeowner had already hired the next plumber on Google Maps.
How the AI agent workflow operates
When the main line is busy or after hours, the AI voice agent answers on the second ring. It asks what is happening, runs an immediate hazard check (active main-line flooding, burst pipe, gas water-heater smell, or sewage backup), states your standard dispatch/diagnostic fee clearly, verifies the homeowner’s ZIP code, and books directly into your live ServiceTitan, Housecall Pro, Jobber, or Google calendar.
What changed
Brothers Plumbing booked over 600 jobs ($1.33M in attributed revenue) that previously leaked to voicemail, while Superior Plumbing kept an 80% booking rate even with half their prior office CSR staff.
Upstate SC note: Pre-configured for Upstate SC plumbing service areas (Greenville, Greer, Simpsonville, Mauldin, Taylors, Travelers Rest, and Easley).
Step-by-step architecture4 stages with human approval gates
1 Stage 1Customer / Trigger
2-Ring Overflow & After-Hours Pickup
Homeowner calls about a leak, clogged main line, or water heater; conditional forwarding routes unanswered calls to the voice agent in 2 rings.
2 Stage 2AI Agent
Plumbing Hazard & Urgency Triage
Detects emergency keywords (burst pipe, active flooding, sewage backup, gas odor), gives main shutoff valve guidance if needed, and separates urgent dispatch from routine estimates.
3 Stage 3System / Tool
ZIP Check, Dispatch Fee Disclosure & Slot Lock
Verifies service-area ZIP code, states the standard diagnostic/trip fee, locks an open arrival window in Jobber / Housecall Pro / ServiceTitan, and sends an SMS confirmation.
4 Stage 4Human Approval Gate
On-Call Tech Alert & Recording Handoff
Sends a 4-line SMS brief + audio transcript to the on-call plumber for emergencies, or warm-transfers commercial/repiping quote requests.
Free previewcopy & test in Claude or ChatGPT
Free preview · test it right now
Free Starter Prompt: Plumbing Emergency vs. Routine Voice Receptionist
Paste into Vapi, Retell, or Claude/ChatGPT to test how the plumbing receptionist triages burst pipes vs. routine water-heater or drain calls.
You are the 24/7 dispatch receptionist for [PLUMBING_COMPANY_NAME], serving [CITY_AND_ZIP_CODES].
Speak in warm, calm, short sentences (1-2 sentences at a time).
### Step 1: Identify Issue & Check for Active Water/Gas Emergencies
Ask what plumbing issue they are dealing with today.
- EMERGENCY TRIGGERS: Active uncontained water leak/burst pipe, sewage backing up into fixtures, gas smell near water heater, or total loss of water.
-> If triggered: Reassure the caller, advise them to turn off the main water shutoff valve (if safe and only for water leaks), collect Name + Address + Callback Number, and trigger `escalate_on_call_plumber`.
### Step 2: Routine Service & Water Heater / Drain Booking
For non-emergencies (dripping faucet, slow drain, toilet running, water heater quote):
1. Verify their ZIP code is inside our service area.
2. Clearly state our dispatch/diagnostic policy: "We have a standard [e.g. $79] diagnostic visit fee, which is waived if you move forward with the repair."
3. Collect Full Name, Street Address, Mobile Number, and whether they know where their main water shutoff is located.
4. Offer the next 2 available arrival windows from the calendar tool and send an SMS confirmation.
Two ways to deploy thisDIY recipe pack or done-for-you build
Download the production recipe pack, or have me wire it into your business.
Option 1 · Self-Serve Commercial Recipe Pack
Unlock the Full Production Recipe
$97one-time download · 3 verification test cases included
Everything your developer or technical operator needs to deploy this workflow safely in production without weeks of trial-and-error prompt tuning:
Plumbing Voice Receptionist System Prompt & Emergency Triage State Machine (Vapi / Retell JSON)
15-Second Missed-Call SMS Recovery Flow ("Are you dealing with an active leak right now?")
100% Implementation Credit: Credited 100% into a $500 discovery session or a $2,500+ workflow build within 30 days.
Option 2 · Done-For-You by David He
Want me to install, test, and run this for your team?
Skip the API keys, webhook debugging, and carrier registration. I connect this workflow directly to the phone numbers, calendars, and software your business already uses.
Step 1 ($0 · 15 min): 15-minute fit call to inspect your current process and confirm fit.
Step 2 ($500): 60 to 90 minute working session + written implementation plan in 48 hours (credited into the build).
Step 3 (Fixed quote): Voice receptionist setups for 2 to 9 person shops start at $700 to $1,000 setup plus $150 to $375 per month; custom multi-system workflows start from $2,500 setup.
You own everything at handoff: Phone numbers, prompts, transcripts, calendars, and the off switch.
Not sure whether to buy the recipe or book a call?
Start with the free 15-minute fit call. Bring your current phone, dispatch board, or Shopify workflow and I will tell you honestly what I would automate first.