Negative keywords for plumbers (Google Ads list)

Residential plumbing campaigns leak money in the same five places, account after account. The patterns are predictable, the negatives below catch most of them, and the leftover ten percent comes out of a fifteen-minute sweep of your own search terms report.

The pattern

Plumbing has more obvious junk traffic than most service categories because the keyword plumber is broad enough to attract job seekers, students, parts shoppers, and DIY homeowners alongside the buyers who actually need a plumber.

The five recurring sources of waste:

1. Job seekers: "plumber salary," "plumber jobs," "plumber school," "apprentice plumber"
2. DIY homeowners: "how to fix a leak," "diy garbage disposal," "replace toilet myself"
3. Parts and supply shoppers: "plumbing supply," "wholesale plumbing," "pipe parts"
4. Wrong service: "pool plumbing" (when you do residential), "commercial plumbing" (when you do residential), "septic" (when you do general)
5. Free / bargain hunters: "free plumber consultation," "cheap plumber"

The list

A starter set for a residential plumbing business. Apply at the account level (or shared list attached to every campaign). Adjust as your search terms report reveals account-specific patterns.

Negative keyword set

Residential plumbers

6 groups · 44 terms

Job seekers11

• ·salary
• ·jobs
• ·school
• ·schools
• ·apprentice
• ·apprenticeship
• ·career
• ·careers
• ·training
• ·license requirements
• ·certification

DIY and how-to9

• ·diy
• ·do it yourself
• ·how to
• ·how do i
• ·how do you
• ·tutorial
• ·youtube
• ·step by step
• ·myself

Parts and supply8

• ·wholesale
• ·supply
• ·supplies
• ·parts only
• ·fittings
• ·pipe parts
• ·replacement parts
• ·plumbing parts

Wrong service6

• ·pool
• ·septic
• ·well water
• ·sewer treatment plant
• ·industrial
• ·wholesale plumbing

Free / bargain5

• ·free
• ·cheap
• ·discount plumber
• ·free quote only
• ·free estimate plumber

Information seekers5

• ·definition
• ·what is
• ·what does
• ·wikipedia
• ·reddit

Common over-blocks

Three terms plumbers commonly want to broad-block but should phrase-block instead, because each has a legitimate buyer use:

• commercial: phrase-block as "commercial plumbing" only if you do residential. The word commercial appears in valid queries like "commercial plumber recommended for home" (a homeowner asking about a contractor).
• hot water: do not block. People search "hot water heater repair" looking for residential service.
• pipe: do not block. Half of plumbing queries contain this word.

Geographic blocks

A residential plumber serving Phoenix metro should not pay for clicks from queries naming Tucson, Flagstaff, or out-of-state cities. Geo targeting catches user location, but search queries can name cities the user is not currently in. Add the major out-of-area cities to a shared geo-blocks list.

Common Phoenix-area plumber geo blocks:

• Cities outside service area: tucson, flagstaff, prescott, sedona, yuma
• Out-of-state cities: dallas, houston, las vegas (common in mis-clicked Google queries)

What this list is missing

Two patterns that vary too much by sub-niche to include in a generic list:

Brand competitors. If you bid on competitor brand terms (or want to exclude them), that is account-specific. Add named competitor business names as exact-match negatives if you choose not to compete on those queries.

Service-line specifics. A residential plumber who does not do drain cleaning should phrase-block "drain cleaning service" alongside DIY blocks. A plumber who does not do water heater installation should phrase-block "water heater installation" if it is consistently low-converting. These vary too much to include here.

What good looks like

After applying a list like this and doing one search-terms-report sweep, a typical residential plumbing campaign sees:

• 15-30% reduction in cost-per-click on broad-match keywords (because the matcher concentrates on tighter queries)
• Conversion rate up by 20-50% (because the click pool is mostly real buyers)
• Cost-per-conversion improvement that takes 2-4 weeks to fully show in the data

The list is the starting point. Your account's specific waste patterns will appear in your own search terms report after thirty days. Sweep monthly, journal what you blocked and why, and the leakage compounds in your favor.

Try Sensei Ads free if you want to skip the spreadsheet step. Upload your search terms CSV with a one-paragraph business description and get a categorized list with reasons attached.