Is there a chemical and/or preventive maintenance procedure that will keep our main drain line clean? Occasionally, we experience a backup of water, which seems to be due to a buildup of a black greasy residue within the line. Would you recommend a periodic flush of hot water to “melt away” the detergent? If so, how hot? Our normal hot water temperature is maintained at 120-degrees; however, most washes selected are in cold water.

We also have observed that some of our customers use too much powdered detergent, which we believe contributes to our problem.

We are a two-year-old, full-service laundry with a four-inch main drain that runs approximately the 70-foot length of our store. I must admit that the line does not drop much from front to back of store, which also probably does not help our situation.Our equipment mix features 23 two-year-old washers, including six toploaders, nine 30-pound frontloaders, five 40-pound washers, two 60-pounders and one 80-pounder. For the first time since opening, we recently had a plumber use a rod to clear the line.

First of all, hot water won’t do anything to help your situation.There are two things that are important in any type of coin laundry installation – big or small; that’s the size of the drain line and its approximate pitch from the front to the back of the store.If your pitch is incorrect, you will get what is often referred to as “lazy water,” and this is what causes that black “muck” to settle and collect, because the water is not moving fast enough to leave your line.You have two problems:

(1) for all the equipment you have in your store, you would have been better off installing a six-inch drain line, and

(2) you probably could use another six- to 10-inch drop from the front to the rear of your laundry.

Unfortunately, it most likely would be too expensive to re-do your main drain line. Therefore, I would recommend you have a power wash cleaning done on the line once a year. This will do clean your drain pipe more thoroughly than a standard rod cleaning, because it’s high pressure and it will flush through the full circumference of the pipe. It also will dislodge and flush out any of the coins that tend to fuse together in that detergent/muck mix.

You are correct about powdered detergents, especially the less expensive brands – they have a high concentration of soda ash, which has a tendency to harden like concrete when it comes in contact with cold water. And, once it hardens, it’s very difficult to loosen up. Again, the best advice is to power wash your drain line annually. This should alleviate your problem.

Do you have any tips for removing fabric softener from lint traps?

If the fabric softener is on the lint screens for your dryers, the most effective way to clean off that softener residue is to remove the screens and simply wash them in hot water with a standard detergent. Most lint screens are made of fabric and are detachable, so they are relatively easy to clean.On the other hand, if that fabric softener in built up in your drainage system, there are only two ways to remove it – either have the lint traps power cleaned or have them rodded out. Softener and other chemicals have a tendency to harden, so those are the two best options for that scenario.

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