Sounds like you may have been in Clog Passage, from Porth Crawl it ascends slightly and steeply into Clog Passage (and once in Clog Passage you pass the Codeine Connection on your right, this loops back into Fall Chamber), Clog Passage continues to Final Aven where you will find Picnic Passage in the floor on the right. Low, wet, and very unappealing. So yeah, keep poking your head around where you were. From the handful I've times I've been down there I found it easier going from Falls Chamber, then dropping into the Codeine Connection with the helmet off tuck and roll move, and then back out down the steep rift towards Porth Crawl, as gravity is on your side for the awkward bits.
Back near the intersection of the Codeine Connection and Clog Passage there is a dig in the floor that leads to Fireset Mine - this would be where the miners originally had access to Clog passage from I believe. You will see some old stacked deads, and the passage is named because cavers (John Beck?) found little kiddies clog prints in there when originally explored, children were used to explore ahead by the miners because they were even smaller versions of the already stout Derbyshire t'owd man. Porth Crawl I think was named by the diggers at the time (possibly Norman from SUSS told me this?) because they had forcibly extradited some chemical persuasion from the mines/quarries down in Porthcawl, S.Wales for use in Derbyshire, some may have been used to open up this tight section.
A word of caution, the Peak District has had some freakish rain in the last 24h, for most places with good flow it will be clearing/have cleared by the time you arrive, however there are some static puddles and ducks in Picnic that may be higher than usual due to extra percolation water, turning an unpleasant but challenging bit of cave into an unpleasant and unsafe one (if you've never been there before).
However it's unlikely to be an issue, and everything before Picnic will drain nicely so there's no harm having a look, and the whole system is very good to explore. Plenty of info on here if you search for Picnic Passage, Clog Passage, Porth Crawl etc. posts from me, Jon Pemberton/the Pemberton Brothers, Rob Eavis, Mel Milner. Mel and the Pembertons being the most active digging in Picnic, anyone else has had more sense and stayed away.
There will be some hose and tools left behind in there if you want to do your bit for cave conservation...Enjoy!
