I would not get too excited nor bothered by dumping small quantities of acid or base down to sewer NOT SEPTIC SYSTEM. Small quantity is quart or less. Just do it with running water to ensure adequate dilution.
Any acid will dilute a base and vice versa.
Drano is sodium hydroxide and a strong base and can burn you - yet it is for sale at grocery store.
Get yourself some pH test strips. What you want to do before dumping down drain is to neutralize to a pH of 7.
IF neuting an acid say
phosphoric (derusting)
sulfuric (battery electrolyte) hydrochloric (plating derusting)
you CAN add pellets of Drano but things will get agitated for sure. I would dilute Drano in at least a gallon of water and add some and see how strong the reaction is. YOu can keep going until reaction is small THEN test with pH strip.
Wear goggles faceshield and rain gear when doing this the first time. After you get an idea of what happens you can dispense with rain gear but NEVER goggles.
At pH of 7 it can go down city sewer.
Dan Bentler
Last edited by leitmotif; 04/07/2011 6:37 AM.
