Wash Bay Odor Problems?

Does the water in your wash bay have a strong offensive odor? Is it especially noticeable after a period of inactivity such as Monday morning?

What causes Wash bay Odor problems?

Odor is usually from bacteria in the water under what is called anaerobic conditions (no oxygen). When those conditions exist the anaerobic bacteria produce Hydrogen Sulfide gas, and that gas smells like rotten eggs. This is usually most notable in the summer time when its warm or after a weekend when the water sits and becomes stagnate.

How Do I Control Wash Bay Odor Problems?

  1. Manual Odor Controls:

    Visit your local swimming pool store and purchase a package of chlorine test strips and a package of pH test strips. Add chlorine tablets or liquid until you have 1 to 1.5 ppm chlorine as shown on the chlorine test strips.   Also check the pH. It should be 6.8 to 7.0.

    Pit Odors: If the odor is from the wash bay pit, the one in the wash bay, you can add chlorine tablets from the swimming pool store.

  2. Automatic Odor Controls:

    Automatic odor controls that are commonly used consist of an ORP (Oxidation Reduction Potential) probe, meter and controller.  Look at your ORP reading on the control panel.   You should see a reading of +500 on the LED Readout.  Add liquid Sodium Hypochlorite (Bleach) that you should have, 12.5% solution, in a 55 gallon drum.  Check to make sure it is pumping when the reading is less than the set point.

    Note: Bleach loses its strength over time. How old is your bleach?

    The more bleach in the water the higher the ORP number. Aim for + 500. Your owners manual should have more to say on this. Check that the low volume feed pump is working. It is labeled ORP. If the small green LED Light just above the ORP reading is green the pump should be turning.

    Periodically clean the ORP probe and pH Probe with vinegar. Put in vinegar until clean.

Aeration Control:

Another option is to add aeration to the pits where the odor is coming from.

Refresh the System:

Have everything pumped out by a waste disposal company and start over, you should be pumping it out at least twice a year even without odor problems.

Quick Fix:

As temporary fix, get some bleach from the grocery store and pour it in. Or get some chlorine tablets from the swimming pool store.