If chemical feed equipment is not cleaned and operational when stored, it probably won't work in the spring. Feel free to call us with questions or problems (1-800-253-7235).

Winter Storage of Gas Chlorinators

and SO2 Feeders at Wastewater Plants

When chemical feed equipment is stored for the winter, different brands require different procedures. The most important thing to remember when storing chemical feed equipment for the winter is to keep it located in a room where the temperature stays as constant as possible and to prevent moist air from entering the equipment through the fittings and vents. A dry room with an even temperature is the ideal storage condition. Before a unit is stored, check that all components are working properly Make sure the rate ball and tube are clean and that the rate adjustment does not stick. Inspect all equipment for cracks or excess corrosion. If plastic is discolored, that is a sign of fatigue and the part is likely to develop a crack soon and should be replaced. Fall is also a good time to make sure the unit is thoroughly cleaned. Best cleaning agents for PVC parts is warm, soapy water followed by an alcohol rinse. Dry completely. Overhaul as necessary replacing sticky valves, o-rings, and gaskets etc. Refer to owner’s manual for maintenance and repair instructions.

Vacuum Regulators:

Seal all openings with a tubing loop connecting the two fittings (the vent and ejector supply). Another way to seal the openings is to use plugs (see below). You can store a vacuum regulator on the cylinder or off. Regal ™ Model 210, Superior ™ Model CL1 Advance™ Model 200, 400, Ecometrics™ Model 2000, 4000, or W & T ™ Model 210 C or D can be winterized either way.

Option 1: On-cylinder storage:

Store the chemical feeder directly on the gas tank with the valve shut off.

Option 2: Off-Cylinder storage:

With wall vented chlorinators and SO2 feeder such as Superior’s Model CL-16 and Regal’s Model 216 you can use either option for the inlet valve and there is only one fitting that needs to be sealed. The vent unit, located on the wall also needs to be sealed.

W&T’s Model V-100 has a cylinder unit, you can use either options for the inlet valve and there is only one fitting that needs to be sealed.

The W&T V-100 wall unit also has the rate meter and tube along with the vent. This wall unit normally has 3 fittings that need to be sealed.

Switchover Valves:

Switchover valves can be left in place mounted on the wall. The fittings must be sealed using plugs (see below). You will need three plugs.

Remote Meter Panels:

Make sure the rate ball and tube are clean and that the rate adjustment does not stick.. Then, seal all openings with a tubing loop connecting the two fittings (the vent and ejector supply). Another way to seal the openings is to use plugs (see below).

Automatic Rate or Vacuum Solenoid Valves:

Seal all openings with a tubing loop connecting the two fittings (from the vacuum regulator the and ejector supply). Another way to seal the openings is to use plugs (see below.)

Ejectors:

Disassemble and inspect internal parts, cleaning and replacing as necessary. Nozzle assemblies should be cleaned and replaced as needed. Sealing of an ejector is not necessary. Make sure all water has been removed and equipment is dry. All transport tubing should be plugged (a golf tee works well for this or you can wrap the ends with electrical tape).

Plugs: A plug can be made by using a 6” piece of the vacuum tubing, heat in the center using a propane torch, when nearing melting point twist and pull apart to give you two sealed pieces of tubing to put over fitting ends.