Responses
https://www.mangago.zone/read-manga/itou_junji_kyoufu_manga_collection/
Here it is! The one you're talking about is volume 7, chapther 6!!
Heres the link tho:; https://www.mangago.zone/read-manga/itou_junji_kyoufu_manga_collection/mf/v07/c006/
aaah thank you thank you!!!
there were two sisters with an overly clean mother so they had to take baths everyday, one of the sisters had a stalker that she would try to avoid, one day a sister was taking a shower and something pulled her down the drain, it also mentions how the family had been hearing weird groaning noises from the pipes of their house for a while... i think its junji ito