You should never use Teflon tape on plumbing connections that rely on rubber washers, O-rings, or flare fittings to create a watertight seal, such as flexible supply hoses connected to faucets, toilets, or water heaters. In these specific joints, the threads are strictly meant to hold the mechanical connection together while the rubber seal stops the water; adding tape can interfere with proper seating and cause leaks. Additionally, avoid using standard white water tape on gas lines, which require specialized yellow gas-rated tape. Forcing tape onto compression fittings or unions is also incorrect and can distort the joint or prevent proper tightening.
1 votes
Marked as accepted