Drain — Can Bleach Unclog

Most homes built after 1970 use PVC (plastic) pipes for drains. Bleach is generally safe for PVC in small, diluted amounts. But if you pour undiluted bleach down a slow drain, it sits in the trap (the U-bend under your sink) for hours. Over time, concentrated bleach can make PVC brittle and prone to cracking.

You’re standing in two inches of lukewarm, soap-scum-flecked water. The shower drain is gurgling its last rites. Your first instinct? Reach for the nearest heavy-duty cleaner under the sink. But if that bottle is filled with bright, lemon-fresh chlorine bleach, you might want to pause. can bleach unclog drain

If you have already tried a chemical drain cleaner (like Drano or Liquid-Plumr) and then decide to "boost" it with bleach, you are creating a potential deadly gas. Mixing bleach with acids (found in many "professional strength" drain openers) releases . Mixing bleach with ammonia (found in some all-purpose cleaners) releases chloramine gas . Most homes built after 1970 use PVC (plastic)