What is commercial plumbing?
Commercial plumbing is plumbing work on non-residential and multi-unit buildings, where larger pipes, more fixtures and code-required devices such as backflow preventers and grease traps apply.
A commercial plumber schedules work around business hours and keeps the records that inspectors and water utilities ask for, such as backflow test reports.
What are the 6 commercial plumbing services businesses need most?
The 6 commercial plumbing services businesses need most are listed below.
- Grease trap cleaning keeps restaurant kitchen drains flowing.
- Backflow testing keeps the building water supply separate from contaminated water.
- Drain line jetting clears grease and scale from building drains.
- Water heater service keeps hot water at restaurant and restroom fixtures.
- Restroom fixture repair fixes flush valves, urinals and faucets.
- Leak repair stops water damage in tenant spaces.
Seeing one of these signs? Call a local plumber now.
Call (607) 305-8020How does a commercial plumber service a building?
A commercial plumber uses the 5 steps below to service a building.
- Schedules the work around business hours.
- Inspects the drains, fixtures and code devices.
- Makes the repairs or the cleaning.
- Tests the system and records the results.
- Sets a maintenance schedule for grease traps and backflow tests.
How much does commercial plumbing cost in Lancaster, PA?
It depends on the building and the job: commercial plumbing bills by the hour, and plumber rates run $70–$120 per hour before after-hours premiums, according to HomeAdvisor. Backflow preventer installation costs $150–$450, and annual backflow testing costs up to $350.
Typical prices for 4 commercial plumbing jobs are shown in the table below.
| Job | Typical price |
|---|---|
| Plumber hourly rate | $70–$120 per hour |
| After-hours rate | 1.5 to 3 times the normal hourly rate |
| Backflow preventer installation | $150–$450 |
| Annual backflow testing | up to $350 |
Source: HomeAdvisor national cost data, 2025–2026. Ranges are what most homeowners pay; your plumber gives the price for your job before work starts.
Want a price for your job? Call and describe the problem to a local plumber.
Call (607) 305-8020Which 5 types of Lancaster businesses need commercial plumbing?
The 5 types of Lancaster businesses that need commercial plumbing are listed below.
- Restaurants and food service need grease trap service and drain jetting.
- Food processors and manufacturers need high-volume drains and backflow devices.
- Retail centers and hotels need restroom fixtures, water heaters and drain service.
- Medical offices and clinics need backflow testing and accessible fixtures.
- Apartment and mixed-use buildings need riser, water heater and sewer line service.
Related plumbing problems and next steps
When is a commercial plumbing problem an emergency?
A commercial plumbing problem is an emergency when a drain backs up into a kitchen or restroom, or water leaks into a tenant space. Close the fixture or main valve and call for emergency service. Emergency calls for commercial plumbing problems go to an emergency plumber for Lancaster homes.
What services are related to commercial plumbing?
The 1 service related to commercial plumbing is listed below.
- Grease trap cleaning signs, steps and prices are on the grease trap cleaning in Lancaster page.
Frequently asked questions
Do commercial plumbers work after business hours?
Yes, commercial plumbers work after business hours, so restaurants and offices stay open while the plumbing work happens.
Do Lancaster businesses need backflow testing?
Yes, buildings with backflow preventers need annual backflow testing, and the water utility receives the test report.
What is a commercial plumbing maintenance plan?
A commercial plumbing maintenance plan is a scheduled service contract that covers drain jetting, grease trap service, backflow testing and water heater checks on a quarterly, twice-yearly or custom schedule.