CHEMICAL FEEDERS. With a solution feeder as fitted at the pool pre-determined amount of dry chemical is mixed with water in a solution tank. This solution is then directed to the circulation line via a variable flow impulse type pump which can be regulated to ensure that the correct strength of solution reaches the water. The thing to be carefully watched with this type of feeder is that the chemical being used is completely dissolved and that the solution in the tank is regularly stirred. Use of Chemical Feeders at the swimming pools is to dose alum for coagulation and soda ash for alkalinity control to the water being treated.
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