According to the installation instruction, using green soft spanner to take off the old aerator, and then install new one touch tap to faucet and screw one touch tap tightly.
Note: Please remove the black washer of old aerator and wash the outlet of faucet.

Please adjust outlet water flow from the faucet original switch per your requirement.

We design the thread specification of one touch tap according to International System of Units((M24x1)) , so one touch tap can suitable for majority faucet use. If you have question of specification please visit product introduction at our website.

We designed adapter to make one touch tap install successfully for some old type faucet. We also invented female thread one touch tap (7/8-27). Please visit our fitting section at our website or mail to us.