Yes. You can connect the HOTTAP to your existing faucet in two ways.
1. You can use the included shower hose which uses quick-connect fittings.
You can also use Melnor quick-connect fittings. Something like this (US) or this (AU) will work well, but any similar brand will also work.
2. You can use your own plumbing and connect it to our hose's 1/2 BSP thread.