Adding 12.5% Shock thru skimmer?

[Shredhead]

Will this harm the pvc pipes and/or pool equipment?

I have a Hayward pump, Systems 3 cartridge filter, Hayward heater and Polaris booster pump.

[Watermom]

It is fine to add it through the skimmer while the pump is running. I always add my bleach through the skimmer.