The selling tech vs service tech tension: how to route calls without a civil war
The selling tech vs service tech tension in plumbing shops isn't about ego or personality. It's about compensation structure and call routing logic. Service techs paid hourly resent every replacement call routed to a commission-paid selling tech because they're watching higher-margin work walk past them. Selling techs paid commission resent every service call routed to them because they're paid less than hourly while solving more complex problems. The shop that pretends this isn't structural — that it's about "team attitude" — ends up losing both roles to competitors who get the math right.
The 30-second version
The tension is real, structural, and largely about money. Three fixes that work together:
1. Pay structure that lets both roles see clear math (hourly + small commission for service techs, base + larger commission for selling techs, with neither role envying the other's expected weekly earnings).
2. Routing logic that pre-qualifies the call before dispatch — repair calls to service techs, replacement-likely calls to selling techs, with explicit rules everyone sees.
3. Cross-revenue mechanics so service techs benefit when they hand a replacement opportunity to a selling tech, and selling techs benefit when they hand a service-only outcome to a service tech.
This is an opinion piece. We don't run plumbing shops; we sell AI on phones to plumbing shops. But we hear this dynamic constantly from operators, and the data points consistently to compensation structure as the root cause that most shops misdiagnose as personality conflict.
Where the tension actually comes from
Most multi-tech plumbing shops eventually split techs into two informal roles:
Service techs: handle service calls, repairs, drain clearing, basic diagnostics. Usually hourly pay, $28-$48/hour depending on market.
Selling techs (sometimes called "comfort advisors" or "install techs" but more commonly just the unofficial "good closers"): handle replacement consultations, repipes, water heater replacements, larger installs. Usually base + commission, with weekly earnings of $1,800-$3,500+ on good weeks.
The friction starts when:
A service tech arrives at a home, diagnoses that a replacement is the right call, and has to either pivot into a sales conversation they're not paid for or hand off to a selling tech who closes the deal and earns the commission on work the service tech identified.
A selling tech arrives at what was supposed to be a replacement consultation, discovers it's actually a $400 repair, and now has to spend an hour on work paid at well below their commission expectation.
A service tech books an $11,000 repipe at the home and feels they should earn more than the hourly rate that day. They don't, because they're not on commission.
None of these scenarios is a personality issue. All of them are math problems created by the shop's compensation structure colliding with operational reality.
Why "team attitude" framing fails
The owner who tries to fix this with culture messaging — "we're a team, the work flows where it makes sense, everyone benefits" — is asking the underpaid role to absorb the cost of the system. That works for 6-12 months. Then the service tech who identified three repipes that month and watched the selling tech earn $4,000 in commission on those three jobs leaves for a competitor where the math is more honest.
The shops that lose this game aren't losing on culture. They're losing on retention. The best service techs leave first (because they have the most options). Within 18-24 months, the shop is left with selling techs who can't service well and service techs who can't sell — and the operational quality drops across the board.
The 3-part fix
Part 1: pay structure with visible math
Most workable structures don't try to eliminate the difference between service and selling roles. They make the expected weekly earnings comparable on average, with different paths to similar outcomes.
Service tech: hourly base ($30-$45) plus a small commission (typically 1-3%) on any work they personally identify and close at the home, including upsells they handle directly.
Selling tech: lower hourly base ($18-$28) plus larger commission (typically 8-15%) on replacement and install work they close.
Expected weekly earnings target: roughly comparable on average across a quarter — typically $1,500-$2,400 for service, $1,800-$3,000 for selling — with the selling tech having higher ceiling but more income volatility.
The key transparency: both techs should be able to look at their own earnings and at typical earnings for the other role and see the math working. The selling tech earning more on a good week sees the service tech earning more on a steady week. Neither one looks at the other and feels cheated.
Part 2: routing logic that pre-qualifies
Most shops dispatch the next available truck. That works until a service tech keeps getting routed to replacement-likely calls, or a selling tech keeps getting routed to repair-only calls.
Better routing pre-qualifies the call at intake:
Call type signals replacement (water heater 10+ years old, repipe inquiry, slab leak, sewer lateral): route to selling tech if available, service tech with selling-tech-as-backup otherwise.
Call type signals service (specific component failure, repair request, drain clearing): route to service tech.
Ambiguous: route to whoever's available with no preference, but tag the call for upsell-awareness.
The CSR or AI handling intake runs the qualification. If they don't, dispatch makes uninformed routing decisions and the tension compounds.
Part 3: cross-revenue mechanics
When a service tech identifies a replacement opportunity and hands it to a selling tech: service tech earns a referral fee (typically $50-$150 per qualified handoff, or 0.5-1% of the eventual close).
When a selling tech arrives at a job that turns out to be service-only: selling tech earns a small base completion fee for the service work, not commission, but enough to not feel punished for arriving (typically $40-$80).
The cross-revenue mechanics need to be small enough not to distort behavior (service techs don't suddenly start mislabeling everything as replacement opportunities to earn referrals) and large enough to remove the felt-injustice (service tech doesn't feel they did the work for free).
What this looks like in a working shop
A 6-truck plumbing shop running this structure typically has:
3-4 service techs on hourly + small commission
1-2 selling techs on base + larger commission
Clear written rules on routing logic, visible to all techs
Monthly review of handoffs and referral fees, transparent to everyone
Average tech tenure 4+ years (vs industry typical 1.5-2 years for plumbing techs)
The retention improvement alone — going from 1.5-2 year average tenure to 4+ — saves a 6-truck shop $40K-$90K/year in turnover costs, training time, and productivity lost to ramping new hires.
Where AI handling makes routing consistent
The routing logic only works if it's applied consistently at intake. CSRs who default to "whoever's available next" because the call sounds urgent end up routing replacement opportunities to service techs and vice versa.
An AI Employee on inbound calls trained on the shop's routing rules applies them automatically. Call sounds like a water heater replacement (age 10+, leak from tank, multiple symptoms) → routed to selling tech available. Call sounds like a service-only repair (specific known fault, recent maintenance call, simple drain issue) → routed to service tech.
The dispatcher then sees a pre-tagged call and can override only with intentional judgment, not by drift. Routing discipline goes from "depends on which CSR took the call" to "applied uniformly every time."
The harder fix: owner mindset
The structural fixes above don't work in shops where the owner believes the tension is about "team attitude" rather than about math. Shops that get the structure right typically have an owner who:
Acknowledges that both roles have legitimate complaints under the old structure
Shares the math openly with both roles
Iterates the rules when they don't work, rather than blaming techs for resisting the rules
Recognizes that retention of good techs in both roles is worth more than squeezing margin on commission structures
The shops that get this right end up with both roles satisfied with the math, low turnover across the team, and operational quality that compounds over years. The shops that don't end up with the same friction every 18 months and a different cast of techs each time.