Located along the old road to Bentong (of the unremarkable hot springs fame) even the best website in Southeast Asia on waterfalls mentions this as 'unknown':
'This nice unnamed waterfall can be seen from the road. Will be powerful in the rainy season'.SerenDIpiTy claims the same:
'We exited at Genting Sempah and use the Janda Baik road to link to Gombak-Bentong road. From here you will pass the unnamed waterfall'.It's a good view from the road, but that's about it.