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reply to TheSMJ
Re: Another clogged drain thread: Bathtub drain clogged I always use hot water with insta-flo. Never had an issue. I was told about it by a master plumber that uses it as a maintenance item on slow drains rather than snaking them. He charges flat rate, by the job, so if insta-flo causes an issue, it's out his pocket, not his customers as they already have a signed contract for the flat rate job to be performed.