Commercial plumbing service

Yes: describe the property, equipment and urgency so a commercial-capable professional can be matched to the job.

Sometimes. Include required access and shutdown windows when requesting service.

Larger lines, grease, high use and specialty fixtures can require different tools and experience than residential work.

Some mechanical contractors handle both, while others specialize. Each scope should be confirmed for the specific property.

They do the same job at different scales and locations. A grease trap is a smaller unit, usually under a sink or in the kitchen floor, that separates fats, oils and grease from wastewater by letting them float before the water leaves. An interceptor is a larger, usually exterior and often in-ground vessel serving the whole kitchen with far greater capacity and a longer retention time. Local ordinance normally sets which one your operation requires and how often it must be pumped and documented, and the documentation is part of the requirement, not an optional extra.

The local wastewater authority decides, and in practice any establishment preparing food is presumed to need one until they say otherwise. Sizing depends on flow, fixture count and menu, and undersizing is the usual mistake: an interceptor too small for the kitchen fills between services and passes grease into the lateral anyway. If you are taking over an existing food-service space, do not assume the previous tenant's interceptor is correctly sized or in good condition. Have it inspected and confirm the service records exist, because the authority will ask you for them.

Some of it, with a clear line. Maintenance staff commonly plunge a toilet, change a faucet aerator, clear a strainer, or reset a disposal. What changes in a commercial building is that much of the plumbing is regulated in ways residential plumbing is not: backflow assemblies, grease interceptors, emergency fixtures and health-code equipment all have testing and record-keeping obligations, and the person doing the work often has to be certified for the record to count. Also, work in an occupied commercial building carries liability that a landlord's insurer and your own may both have views on.

The cost is usually business interruption instead of the repair. A food-service business with a failed grease interceptor or a backed-up drain faces a health-department closure; a building with no working restrooms sends employees home; a leak into a tenant's space below creates a claim against you. That changes the economics compared with a house: for most commercial properties, the value of avoiding an unplanned closure exceeds the cost of the maintenance that prevents it by a wide margin.

There is no single interval. The intervals come from what the building has. Backflow assemblies are generally annual. Grease interceptors are on a schedule set by the local wastewater authority and often monthly or quarterly for a busy kitchen. Emergency eyewashes and showers are commonly weekly activation and annual inspection under the applicable safety standard. A general plumbing walkthrough once or twice a year catches the rest. The useful move is to build a single calendar of every recurring obligation the property has, because they arrive from different regulators and nobody sends one combined reminder.

The lease decides, and the answer is genuinely different across leases, so read yours rather than relying on the norm. A triple-net lease commonly puts most maintenance on the tenant. A gross lease commonly puts building systems on the landlord. Even within one lease the answer usually splits by location, fixtures inside the demised premises to the tenant, building risers and mains to the landlord, and the interesting disputes are about the piping between the two. Where your business installed equipment that created a requirement, such as an interceptor for your kitchen, expect that to be yours regardless.

Commercial plumbing warranties are frequently shorter than residential ones because equipment runs harder and more often. Ask specifically, since a warranty term copied from a residential quote may not reflect commercial-duty parts and cycles.

Assuming a previous tenant's grease interceptor or backflow device is correctly sized and in good standing. Inheriting equipment without inspecting and verifying its service records is a common way a new occupant discovers a violation that predates them but is now their problem.