Soda Machine and Ice Well Drain Cleaning in Phoenix

They smell because the drain carries almost nothing but a trickle of sugary or mineral water, which never rinses the pipe. Ice melt, soda gun drips and syrup residue run into a small drain and sit there. Slime grows on the wall of the pipe and in the trap, and the odor comes up through the air gap every time the bin drains.

Ice machine makers describe the same thing. Hoshizaki's manual says slime can build up inside the ice storage bin drain and stop water from draining, and it tells operators to clean the bin drain every 3 months or as conditions require. If it clogs, water builds up and can overflow the bin. That interval is the manufacturer's maintenance step for the bin. The line behind it is separate, and it is the part a plumber cleans.

We jet beverage and ice drains with a cleaning solution, because a brush and a rinse reach only the first stretch of pipe. A visit goes in this order:

1. 1The ice bin and well are emptied before we start. Ice that has touched a drain or a cleaning solution should be discarded, not reused.
2. 2We trace the drain to its receptor, whether that is a floor sink, a standpipe or a floor drain, and check that the trap holds water.
3. 3We run a small-bore jet and the cleaning solution through the drain line, then flush the line with clear water.
4. 4We look at the air gap, the receptor strainer and the receptor's access, since a bad gap is how the smell and the contamination risk get back in.
5. 5We run water into the well to confirm that it drains fast and does not splash out of the receptor.

The work is scheduled before opening or after close, and the inside portion usually takes one to two hours. We give an upfront price before work starts.

The drain from ice and soda equipment must end above the receptor, not in it. The 2024 plumbing code, as Phoenix adopts it, requires indirect waste for ice and food storage equipment, an air gap of at least twice the pipe's effective opening, and a trapped, vented receptor with a removable strainer and ready access. Maricopa County's plan review sheet asks for a minimum 1 inch air gap on sink drain lines, and the Hoshizaki manual wants at least 2 vertical inches between the ice machine drain and the floor drain. When two numbers apply, the safe move is the larger one.

The failures these rules are written to prevent are easy to picture: a drain hose pushed down into a standpipe, a receptor under a shelf where nobody can reach it, or a strainer that went missing. Each one lets the smell, and in a bad case sewer water, travel back into the equipment. Fixing it is part of the job. See our guide to draining a commercial ice machine legally for the code and manufacturer detail.

The solution has to be one the pipe and the sewer can take. Phoenix's city code bars discharging water with a pH below 5.0 or above 10.5, or hotter than 150 degrees Fahrenheit, to the public sewer. That rules out strong acid or caustic left in the line, and it is another reason a flush with clear water is part of every visit. Keep the supply-side rule separate in your head: the county's RPZ requirement for carbonators protects your water line and has nothing to do with the drain. Our page on the soda and ice machine backflow preventer covers that side.

• The smell is a dry trap. A floor sink or floor drain that only receives occasional water loses its trap seal to evaporation, and a dry trap smells like a drain. Pouring water in, or fixing the trap primer, solves it. See commercial floor drain cleaning.
• The machine is dirty, not the drain. The ice machine's own cleaning and sanitizing is the manufacturer's maintenance, done by your staff or a service tech. We are plumbers, and we do not service the machine.
• The bin overflows only after the machine cycles. That can be a drain pump or a kinked drain hose. If the drain line clears with a quick flush, we will say the machine is the next place to look.

Tell us where the smell is strongest, whether the receptor is a floor sink or a standpipe, and when the drain was last cleaned. We offer free estimates, and if you already have a kitchen visit booked, such as a hydro jetting pass on the laterals, ask us to add the beverage drains to it. See also commercial drain cleaning and restaurant plumbing, and for bars in particular our page on breweries and bars.