Warriors also stopped the Pirates from crossing the whitewash to the delight of Hill who will now take his team of a three-day camp ahead of the last eight game and league play-offs.
"That was cup rugby - you get the game won and then you close it down," said Hill. "There was no point keep throwing the ball around like we did against London Welsh and conceding tries.
"It was about getting through to the next round and we did that 25 points in the first half and three tries to nil.
"After that we just wanted to get through the next 40 minutes closing the game down in difficult conditions and not get any injuries.
"It was a job very well done. Keeping a clean sheet with no tries against us and nobody getting over the line was a big step forward for us.
"I think we have made a point to them and we have got better since losing to them. We have been down to their place and beat them on their ground and got a bigger margin of victory today and denied them any bonus point or try.
"We are definitely getting the measure of them bit by bit. The second half had some good old fashioned niggle and it got spicy at times, but that is good. We will put that to the back of our mind and won't forget that."