Chemical Feed Systems

Chemical feed system

Made in USADime Water, Inc. does everything possible to avoid the use of regeneration chemicals when working with customers to solve water related problems. In the last 21 years of practicing this policy we have prevented the discharge of hundreds of millions of gallons of chemically tainted water being discharged into waste water plants, aquifers, and surface water sources.

There are situations, however, where some type of chemical must be used to properly treat water — typically to raise pH to eliminate corrosion; kill bacteria to make water potable; coat metal plumbing to stop corrosion; add an oxidizing agent to keep a filter medium continuously regenerated; pre-treat a RO unit to enhance membrane life.

Chemicals we use include:

Potassium carbonate. Naturally occurring salt. The carbonate portion neutralizes the carbon dioxide in water to elevate the pH. Carbon dioxide creates carbonic acid that is usually the cause of low pH (acid) water.

Liquid chlorine bleach. Creates hypochlorous acid in water that kills harmful bacteria for potability and also bacteria causing sulfur (rotten egg) odors and iron bacteria. Also an excellent oxidizing agent to pre-oxidize iron and manganese prior to filtration. Keeps filter media clean and in a regenerated state. Properly fed, the chlorine is consumed by chemical and biological demand (COD and BOD) with only a slight remaining residual in the water. Chlorine reverts naturally to salt.

Hydrogen peroxide. Used as a direct replacement for chlorine without the taste, odor and disinfectant by products (DBP’s) associated with chlorine. Reverts to water in presence of light.

Sodium Hexametaphosphate. Tiny quantities in water (1 or 2 mg/l) will react with metals such as calcium to coat metal pipes and fixtures to prevent corrosion. Phosphate is a plant nutrient thus favored for corrosion in irrigation systems.

RO anti-scale chemical. Normally a weak organic acid combined with a surfactant. Eliminates the need for a pre-RO softener thus saving the operator capital cost and operating expense. Normally fed into the raw feed water at a level of 1-2 mg/l. This trace chemical volume remains in the reject water with none appearing in the treated water.

The key to the application is to treat a relatively constant flow so that a simple on/off feed pump as shown here can be employed. This is usually the situation with RO pre-treatment and for flows between a well and a storage tank either atmospheric or hydro pneumatic. If variable flows are to have chemical injected, a meter that produces a pulse proportional to flow and a pump that can be paced with such a meter must be employed —a much more expensive set of components.

Chemical feed pumps on skidTwo types of pumps are normally used:

Diaphragm – where a flexible material is moved back and forth creating vacuum on pull and a pressure on push.

Peristaltic – where a tube is pinched and released with vacuum on release and pressure on pinch. Application, serviceability, available materials, and price determine the selection.


The chemical treatment of water employs using an extensive palette of chemicals, according to your water issue. From algaecides, biocides, corrosion inhibitors, to disinfectants, flocculants and scale inhibitors, Dime Water Inc. provides everything you need in term of chemical water treatment.

Call to purchase Chemicals: 760.734.5787


Feed pumps provide accurate continuous feeding, provided that the pump rates are modulated to reflect system changes. Continuously operating feed pumps are simple feed systems that provide adequate control in some cases.

Call to purchase Feed Pumps: 760.734.5787


Solution tanks provide for safe, effective storage and dosing of chemicals (chemical solution tanks).We have half a dozen different-sized tanks depending on the application.

Call to purchase Solution Tanks: 760.734.5787

A water treatment system service and maintenance plan is an economical interference-free manner in order to ensure that the water treatment system is operating at the desired performance. Our approach is – on a local basis including much of southern California – to use contractors’ help. More often than not, we are able to provide a plumber or a licensed technician that will work on our behalf to get the equipment repaired. We are available from 8am-5pm, Monday to Friday to answer all your questions!

Dime Water, Inc. provides pre- and post treatment instructions with every system at the time of the shipment. Our staffed engineers will be in touch with you to answer all your questions about pre- or post treatment. If you have any questions, call and talk to our water treatment experts.

Common Issues with Chemical Feed Systems:

More often than not the problem is a loss of suction and as a result there is no output for the chemical feed pump. The problem most of the times is a foot valve, which gets blocked and the cause of blockage more often than not has to do with mixing chemicals with bad water instead of following the instructions and mixing chemicals with a good quality water.

If you notice that the container that is holding the chemical is not going down and you see that nothing is being consumed means that the chemical feed system is not working. Whatever you are doing with the chemicals, be it anti-scale for reverse osmosis or bleach for killing bacteria or elevating the pH the desired results just stop.


A: Yes we have products for that.

A: We do these calculations for you after we tested your water.

A: We will give you an estimate about this when you purchase the unit.

A: We try everything we can to use chemicals that aren’t going to harm people

A: On the Internet you can find source or give us a call.