Install and seal a water pipe in a concrete wall afterwards?

Hello,

I have an old small concrete slurry pit. To allow rainwater to drain, a hole was drilled into it some time ago. Now, however, I want to collect the rainwater in the pit and install a tap in the existing hole so that I can drain the water when needed. How can I best seal the water pipe with the tap? Unfortunately, I have not yet found a suitable solution; maybe you can help me.

Best regards, Patrick

You basically want a plug? What about an emergency overflow? You should have that anyway. And if you want to clean the pit sometime, you pump it out

yes, basically a plug with a faucet ;). There is also already an emergency overflow.