It was originally developed so that DI users could bypass their resin vessels and inject additives or chemicals. I use it predominantly to inject Enigma additive, I don’t have DI in the van but it seems to boost the performance of the additive injecting it this way. But as I have the pump there I now use it for all my pvc work too. Sometimes I apply and scrub Chems with the Perry Pump and then use the customers tap to rinse it off. Other times I use pure for rinsing too.
Unforutantely I fill with pure and then run through resin bottles. But would be good if I did bypass and had normal tap water in the tank