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All About Kitchen Sink Drainage | Common Complaints All About Kitchen Sink Drainage | Common Complaints

All About Kitchen Sink Drainage | Common Complaints


Sometimes we take daily activities for granted. We hit a light switch, lights turn on. We put something in the refrigerator, it gets cold. We flush a toilet, and thankfully, it flushes. We turn on a faucet, we expect water to come out, and the water to drain.

We, at DirectSinks also make it a habit to read reviews about product. We will check out the competition and search brands we carry and do not carry to see what people say.  

One of the biggest complaints out there is about drainage.

From what I have seen, these are the complaints: 

1. Sink does not drain completely. 

2. water left over creates water spots

3. water pools and does not drain


 We want to address these three complaints and explain the causes. 

water spots on kitchen sink

"Sink does not drain completely. "

    First - Lets talk about pitch.- and not vocal pitch.  Pitch is the change in elevation over a length. Pitch is important in a sink because this determines the direction water will move. When using a sink we need a sink to be somewhat "flat-ish"  so plates and things we clean have a flat surface that we can work with. If a sink has too much pitch, or slope, then using the sink will be more difficult. 

Let's take this a step further. If, for example, a sink bowl measures 28" left to right and has a drain in the center. The pitch may be 1/2 inch from the side wall, to the center drain. Now the over all height from top to bottom is 10" . Next - Now lets move up a size in sink and go to a 30" bowl. The larger sink will have the same height of 10" as the smaller. What does this mean? It means that the the pitch is more gradual. The water will have less speed when traveling to the drain, and have to travel further. 

Hopefully I did not loose you! 

Next part:

Cohesion: Water is attracted to water. 
Adhesion: Water is attracted to other substances. 

Have you ever washed a car? When you hose the car off, does all the water roll off the doors and windows? No. It never does. Even when waxed! - This is adhesion.

The same applies to your sink. Regardless of the pitch or slope of the sink to drain, water drops will still remain. You can't fight science. 


"Water left over creates water spots"

  Keeping what you just read above water drops will stay. But, what we want to know is why does the water left behind leaves spots. 

Let's, now discuss the composition of water. Two hydrogen molecules and one oxygen molecule.  We drink it, we bathe, cook, swim, and, often over 70% of our bodies are made of it.  

Water we are supplied with in our homes comes from different sources. It could be well water, town/city water, and reservoir.    

Regardless of where your water originates, it is not pure. (It would have to be distilled water in a sterile environment, or purified with reverse osmosis)  

Commonly, we can expect traces of minerals in our tap water. Depending on our source, these can have wildly different concentrations.  Often you can find Calcium, Magnesium, and Sodium.  Some people may find traces of iron, lead, sulfur, fluoride.

Still with me?   Good! 

Now, take the adhesive water drops left in your sink that have a trace minerals. Let the water dry. The water, not the minerals evaporate.  Minerals are left behind.  This is now a water spot. 

Water spots are not a deficiency of the sink.

I repeat, water spots are not a deficiency of the sink.

Water pools and does not drain.

Here is where things get exciting. 

If water is pooling, one of three things are wrong. 

1. Sink is warped. Metal has a reverse pitch and moves away from the sink drain. 

     In my over 15 years of building material supply, I have seen this once, just once. 

2. Cabinets are not level. Cabinets should be level before a counter top is installed. 

 The counter top sits directly on the cabinet walls. If the cabinets are not level, the top is not level. If the top is not level, your sink is not level. 

3. Counter tops are not level. 

      We have heard of it happening on level cabinets. A counter top that is not level can have a piece of debris on one of the cabinet walls that cause a tilt. Your sink is attached to the counter top. If the counter top is not level, neither is your sink.  

 Out of all three issues, #2 and #3 are the most common..... by a long shot 


I know what you are thinking:

 "If I can't escape water spots, how can I reduce them?"

Let'ts bring up the science stuff again; remember the "Adhesion" effect? 
  • If water sticks to things, we need the water not to stick to things.
  • Fancy Word Time! - Hydrophobic - The resistance of water to adhere or mix with a substance. (Like oil)  

Create a more hydrophobic surface on your sink. One method is to use a stainless steel polish or wax. Personally I use a stainless wax that I get from a large homestore. 

Keep in mind, if you use a wax/polish, the water may still stay in the sink, but beaded up (Like a freshly waxed car). If the water drops dry, those pesky trace minerals can still leave a spot. However, having a polished surface under the spot help clean that spot off much, much easier. 

Another method is to take a dab of olive oil on a paper towel and apply to the sink. You do not need a lot! 

"I have water spots and I want them gone!" 

  1. Clean and rinse out your sink. 
  2. Spray white vinegar all over the sink and let stand for about five minutes to break down the elements of the spot. 
  3. Sprinkle a light dusting of baking soda evenly on the sink.
  4. Using a soft sponge, scrub to remove spots 
  5. Repeat as needed until the water spots are removed.

Tip - Use a 50/50 white vinegar water mix on stainless appliances and weekly on the sink to maintain sheen. 

Bonus Info: What about bathroom sinks?

  If you have a glass vessel, try "Rainex", found at auto parts stores. This works great on shower doors, too! 

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