Pouring a pot of boiling water directly down the drain into the trap may dissolve the clog, especially if it consists of soap scum or grease. Hot tap water won’t do the trick—it has to be boiling water. CAUTION: Do not pour the boiling water directly into a porcelain sink, but a down the drain.Click to see full answer. Considering this, is it safe to pour boiling water down the drain? Do NOT pour boiling water down your sink or toilet. While it’s probably okay to dump boiling water in the sink when your pipes are clear, a clog will trap the water in the pipe. This can melt PVC piping and pipe seals, causing serious damage.Likewise, will pouring hot water down a drain unfreeze it? If you need to unfreeze water pipes, leave your faucets open slightly to help thaw out the pipes. Pouring salt or warm water down your drains may also help thaw out the pipe faster. If the pipe is inside of a wall, blow a fan heater into the nearest vent. Simply so, can PVC handle boiling water? The general rule of thumb is that hot boiling water can soften or even slightly melt the joints in your PVC pipes so YES, if you subject these types of pipes to high temperature water on a regular basis – they can be damaged, causing leaks and eventually requiring replacement.Why does boiling water unclog drains? Using Boiling Water to Clear a Drain Is an Old Remedy Because it has to come in direct contact with the clog to do its thing, boiling water works best when the drain is still flowing, and it doesn’t work as well when it’s diluted by standing water in the sink.

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