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Facility programs

Plumbing Service for Multi-Unit Restaurant Groups

Floor drains, grease lines, hand sinks and scheduled jetting handled across every kitchen in your group, done before you open or after you close.

Short answer

A restaurant group needs the same plumbing routine in every kitchen: a jetting schedule for kitchen and trunk lines, grease interceptor records that survive an inspection, working hand sinks, clear floor drains and an after-hours number. We do the inside work before open or after close, so no store loses service, and log each visit by location.

The rules that apply

Each rule links to the official text we read it from. Cities change these, so check the source before a big decision. Last checked 2026-10-04.

Interceptor cleaning cycles and three-year records

Phoenix

Hydromechanical interceptors must be cleaned every 30 days and never go more than 90 days without maintenance. Gravity interceptors must be cleaned at least every 3 months. Maintenance records, including third-party invoices, stay on site for three years.

Source: Phoenix FOG BMP Manual

Hand sinks within reach of every workstation

Maricopa County

Hand sinks must be centrally located, visible and directly accessible, about 25 feet from every food and beverage workstation, with a splashguard within 24 inches. All sinks need mixing faucets or valves, and hot or tempered water at 100 to 110 degrees F.

Source: Maricopa County Plan Review Minimum Requirements for Food Establishments

Indirect drains need a 1-inch air gap

Maricopa County

Warewashing sinks, dish machines, soda fountains, prep sinks, ice machines, steam tables and walk-in condensate lines need indirect waste lines with a minimum 1-inch air gap above the flood level of a floor sink or drain, in runs of no more than 10 linear feet.

Source: Maricopa County Plan Review Construction Guide, Indirect Waste Connections

Floor drains are for cleaning, not for walk-ins

Maricopa County

Floor drains and floor sinks belong where frequent flushing is needed to clean floors or equipment, and cannot be installed inside walk-in refrigeration units, with a narrow exception for trough-type drains in refrigerated processing rooms.

Source: Maricopa County Plan Review Construction Guide, Floor Drains

Restaurants are on the backflow list

Phoenix

Supermarkets, butcher shops and restaurants need backflow protection by air gap or reduced pressure assembly at the connection to the public water system.

Source: Phoenix City Code 37-144(b)

What a restaurant group should standardize

When you run several kitchens, the plumbing problems repeat: grease in the lateral, a floor drain that smells, a hand sink that runs cold and a soda-line drain that backs up on a Friday night. The fix is to run every store on the same routine and write it down. That is what we set up.

Kitchens differ, so the routine is a starting point. A cafe with a coffee counter does not need the schedule of a 24-hour diner, but both need the same records and the same phone number.

A jetting schedule by kitchen

We jet restaurant laterals from the inside with a small hose, and we jet the main out to the city sewer as a separate job. The inside work happens before opening or after close and takes about one to two hours. Soda and ice-well drains are jetted with a cleaning solution, since they smell before they stop.

For a group, the value is in the log. Each visit goes against the store's account with the date and what we found, so you can see which kitchens need a shorter interval. A store that comes back dirty in two months needs a different plan from one that comes back clean in six. For the method, see hydro jetting and commercial drain cleaning.

Grease: the schedule and the records

Phoenix requires a hydromechanical interceptor to be cleaned every 30 days, with a hard ceiling of 90, and a gravity interceptor at least every 3 months. A licensed pumper cleans the tank. HQ does not pump grease interceptors. After the tank is empty, we inspect and repair the parts inside, such as baffles, tees and standpipes, using a three-person confined-space crew.

For a group, the weak point is the paperwork. Phoenix requires three years of maintenance records on site, including the pumper's invoices, and inspectors come unannounced. Keep one binder or folder per store, with every pump-out receipt and our repair notes in it. Phoenix pump-out schedules walks through the cycle, and grease trap service covers our side.

Hand sinks, floor drains and air gaps

Three fixtures cause most of the plumbing citations that are not about grease.

Hand sinks. The county wants one about 25 feet from every food and beverage workstation, with a splashguard and a mixing faucet delivering 100 to 110 degrees F. When a hand sink is out of service, a store can fail an inspection on that alone. See what to do when a restaurant hand sink is out of service.

Floor drains. They belong where the crew washes floors and equipment, not inside walk-ins. A drain that smells is often dry or partially blocked, and a camera can tell you which.

Air gaps. Every warewash sink, prep sink, ice machine and soda fountain drain has to end in an air gap above a floor sink, 1 inch minimum and 10 feet of run at most. A drain hose pushed into the floor sink looks fine and fails the county's rule. That is a quick fix on a service call.

After-hours coverage across stores

A kitchen emergency does not wait for the office. A night dispatcher takes the call, a tech goes out for a real emergency and a supervisor calls the next morning. We dispatch same-day on stoppages: the tech arrives with a cable and a jetter on standby, then we send a hydro-jet proposal for the permanent fix. The details are in after-hours dispatch for facility managers.

Backflow in every kitchen

Phoenix lists restaurants among the facilities that need backflow protection, and the Valley cities have their own versions with different deadlines. If a store serves carbonated drinks, the county wants a testable reduced-pressure assembly between the supply and the carbonator. We test, repair and replace domestic assemblies and file the results with the city. See soda machine and ice machine backflow and multi-location plumbing service for how city rules differ across a group.

When a group program is the wrong answer

If you have one store, you do not need a group program. A single kitchen needs a pump-out schedule, an annual backflow test and a number to call. If a store keeps having the same stoppage, adding visits is not the answer. A camera inspection, then a repair, is. And if grease is leaving the kitchen because of how it is scraped and drained, fix the habit before the schedule.

Getting started

Send the store list, the city for each, who approves work and who gets the invoice. We offer 24/7 emergency service, free estimates and an upfront price before any work starts. For the restaurant rules in detail, see restaurant plumbing.

FAQ

Restaurant Group Plumbing Service: common questions

Anything else, call (602) 675-1555.

How often must a Phoenix restaurant pump its interceptor?

Phoenix City Code 28-15 requires gravity interceptors at food service establishments to be fully pumped out and cleaned at least every three months. Hydromechanical units (grease traps) must be cleaned at least every 30 days and never go past 90 days. In every case, grease and solids must stay under 25 percent of capacity.

Read full answer: How often must a Phoenix restaurant pump its interceptor?
What should a restaurant do when a required handwashing sink stops working?

Keep a required restaurant handwashing sink accessible and usable; a prep sink, warewashing sink or sanitizer bottle is not an automatic substitute. Identify the affected workstation and contact Maricopa County Environmental Services about safe operation. Stop affected operations when an imminent health hazard may exist, and obtain required approval before resuming discontinued work.

Read full answer: What should a restaurant do when a required handwashing sink stops working?
Does a soda machine, ice machine or coffee maker need a backflow preventer?

Yes, in a Valley food business. A soda carbonator needs backflow protection between the water line and the carbonator, and Maricopa County recommends a testable RPZ there. Plumbed coffee and other non-carbonated beverage machines need an ASSE 1022 device or an air gap. Ice machines must drain through an air gap to a floor sink.

Read full answer: Does a soda machine, ice machine or coffee maker need a backflow preventer?
What are the plumbing requirements for a restaurant health inspection?

Inspectors check for safe water supply, stocked handwashing sinks with hot water, backflow prevention and air gaps, indirect waste to floor sinks (1-inch minimum air gap in Maricopa County), a maintained grease interceptor, a mop sink, and approved sewage disposal. All plumbing must stay in good repair per FDA Food Code Chapter 5.

Read full answer: What are the plumbing requirements for a restaurant health inspection?

Running More Than One Kitchen?

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