How to Fix a Leaking Pipe & Dripping Tap: A Step-by-Step Guide

That "tip... tip... tip..." sound at 2 AM. The water bill that's mysteriously higher this month. The damp patch spreading under the kitchen sink. A dripping tap or leaking pipe joint isn't just annoying — left alone, it wastes thousands of litres a year and can quietly cause seepage damage to your walls and cabinets. Most of these fixes cost under ₹150 and take 20–30 minutes once you know the process.

Why Taps and Pipes Leak So Often in Indian Homes

Plumbing systems in Indian flats and houses undergo continuous wear from local water conditions and pressure variations:

• Worn-out rubber washers: Every tap has a small rubber washer inside that seals the valve shut against the metal seat. With daily use, this rubber hardens, cracks, or flattens over 1–2 years — this is the single most common cause of a dripping tap.
• Hard water scaling: In many Indian cities (especially borewell-heavy areas in Bangalore, Chennai, and Delhi NCR), hard water leaves mineral deposits (calcium scaling) inside taps and pipe joints, preventing washers and threads from sealing properly.
• Old or poorly wrapped Teflon tape: Pipe joints rely on Teflon tape (PTFE thread seal tape) wrapped correctly around male threads. If it was wrapped counter-clockwise during installation, or has degraded over years, joints start seeping slowly.
• High water pressure from overhead tanks: Multi-story buildings generate strong gravity-fed pressure from rooftop tanks, accelerating wear on internal tap washers and stressing pipe elbow joints.
• Corrosion in GI (Galvanized Iron) pipes: Older buildings with GI piping (as opposed to modern CPVC/UPVC lines) develop internal rusting, causing pinhole leaks and thread rust after 15–20 years.
• Temperature fluctuation stress: Exposed terrace and balcony pipes expand in peak Indian summers and contract in winter monsoons, gradually loosening threaded joints.

The fix depends on where exactly the leak is occurring — let's walk through fixing both dripping taps and leaking pipe joints step-by-step.

What You Will Need

Gather these plumbing supplies from your local hardware store (hardware ki dukaan) before shutting off the water:

• Adjustable wrench / pipe wrench (spanner): To grip tap headgear nuts and pipe couplers
• Screwdriver set: Flathead and Phillips
• Replacement rubber washers: Buy a mixed multipack (bib tap, pillar tap, or angle valve sizes) — take your old washer to the hardware store for an exact match
• Teflon tape (PTFE thread seal tape): The white plumber's tape roll (costs ₹10–20 at any hardware shop)
• A bucket and old towels/rags: To catch residual line water and mop up spills
• WD-40: To loosen rusted or calcified tap bodies and stuck nuts
• M-Seal epoxy putty: Essential for temporary emergency seals on leaking pipe bodies
• A torch / phone flashlight: For inspecting dark under-sink cabinets
• Small parts container / tray: To keep screws, O-rings, and brass nuts from dropping down drains

Step-by-Step Practical Execution Guide

Part 1: Shutting Off the Water Supply Correctly

1. Locate the isolation valve: Find the dedicated angle stop-cock under the sink or behind the toilet. If none exists, go to your apartment's main inlet foot-valve.
2. Turn the valve clockwise fully: For lever-style quarter-turn ball valves, rotate the handle 90 degrees so it sits perpendicular (crosswise) to the pipe.
3. Drain residual water pressure: Open the affected tap completely and let all remaining water drain out into a bucket until flow stops entirely.
4. Place a towel or catch basin: Lay a rag beneath the fixture to catch any trapped pipe water during disassembly.

Part 2: Fixing a Dripping Tap (Washer Replacement)

1. Pry off the decorative cap: Use a flathead screwdriver to gently pop off the hot/cold plastic button on top of the tap handle, exposing the central brass screw.
2. Remove the handle: Unscrew the center screw and pull the handle straight off the spindle.
3. Unscrew the headgear (cartridge body): Fit your adjustable wrench onto the hexagonal nut of the tap cartridge. Turn counter-clockwise to unscrew and pull the spindle assembly out of the tap body.
4. Inspect the rubber washer: Look at the flat black rubber washer at the base of the spindle — if it is cracked, grooved, or stiff, it must be replaced.
5. Remove the old washer: Unscrew the small brass retaining nut or pry the washer off the center post.
6. Fit the new rubber washer: Push the matching new washer firmly into place and tighten the retaining nut until snug (do not crush the rubber).
7. Clean and check the valve seat: Look inside the tap cavity at the circular brass valve seat. If you see white limescale or rough burrs, scrape them away gently with a cloth or fine sandpaper so the new washer makes a watertight seal.
8. Reinstall the headgear: Screw the spindle assembly back clockwise into the tap body. Tighten firmly with your wrench, but avoid over-torquing.
9. Reattach handle and cap: Push the handle back onto the splines, fasten the screw, and snap the decorative cap back on.
10. Restore water pressure slowly: Open your main valve gradually and test the tap. Close it completely — the dripping should stop immediately!

Part 3: Fixing a Leaking Pipe Joint (Teflon Tape Method)

1. Drain the pipe section: Shut off water and relieve line pressure through the lowest tap in the house.
2. Unscrew the leaking joint: Use a pipe wrench to hold the pipe steady and an adjustable wrench to loosen the leaking union or coupler counter-clockwise.
3. Inspect threads: Clean away old shredded Teflon tape, dirt, and rust using an old toothbrush or wire brush.
4. Wrap Teflon tape CLOCKWISE: Face the male threaded end of the pipe. Wrap the white PTFE tape in a clockwise direction (the same direction the fitting screws on). Wrapping counter-clockwise will cause the tape to bunch up and shred when tightening.
5. Apply 4–6 firm layers: Wrap tightly so the tape stretches slightly into the thread grooves, overlapping each pass by 50%.
6. Smooth down the tape tail: Tear off the tape and press the end down flat against the threads.
7. Hand-tighten first: Screw the fitting onto the pipe by hand until snug to ensure threads are not cross-threading.
8. Tighten with wrench: Use your pipe wrench to turn the fitting 1.5 to 2 additional turns until firmly seated. Avoid excessive brute force on older GI or plastic CPVC threads.
9. Turn on water supply: Slowly open the main valve and observe the joint closely for 5 minutes.
10. Check for weeping: If a tiny bead of water appears, give the fitting a 1/4 turn more. If leaking persists, remove the fitting and apply 2 additional layers of Teflon tape.

Part 4: Emergency Temporary Fix (M-Seal Epoxy Putty)

1. Shut off the water line: You cannot apply epoxy putty over running water; the surface must be free from active pressure.
2. Sand and dry the pipe: Use a rag and sandpaper to clean rust and grease from around the pinhole or hairline crack.
3. Mix M-Seal putty: Cut equal parts of the black resin and white hardener. Knead them together between your fingers until the color becomes a uniform dark gray.
4. Apply over the leak: Mold the putty firmly over the crack and wrap it completely around the pipe circumference like a protective sleeve (at least 1 cm thickness).
5. Allow to cure: Let the M-Seal harden completely for 4–6 hours (or overnight) before turning water pressure back on. (Note: Treat this as a temporary bridge until a certified plumber replaces the pipe).

Troubleshooting Common Mistakes

• "I replaced the washer, but the tap still drips."
  The brass valve seat inside the tap body is likely pitted or damaged from hard water mineral scale. If cleaning the seat doesn't work, the entire tap unit or ceramic cartridge needs replacement.
• "Water leaks from under the tap handle, not the spout."
  This indicates a failed spindle O-ring (the internal gland seal), not the bottom washer. Disassemble the spindle and replace the small black rubber O-ring around the shaft.
• "I wrapped Teflon tape, but the joint leaks worse."
  You almost certainly wrapped the tape counter-clockwise. When screwing the fitting on, counter-clockwise tape unravels and pushes out of the joint. Always wrap clockwise.
• "The pipe joint is rusted solid and won't turn."
  Do not hammer the pipe, as this can snap brittle concealed elbows inside the wall. Spray WD-40 liberally over the joint, wait 15–20 minutes for it to penetrate the threads, and try again with dual counter-acting wrenches.
• "I tightened the joint hard and the plastic CPVC fitting cracked."
  Plastic fittings become brittle when over-tightened. Shut off water immediately — a cracked fitting cannot be salvaged and must be cut out and replaced with a fresh CPVC solvent socket.
• "New washer is slightly too small or thick."
  Different tap brands (Jaquar, Hindware, Cera, Parryware, local brass) use distinct washer thicknesses. Take your old cartridge or washer directly to the hardware shop to match millimeter tolerances.
• "Water pressure dropped noticeably after reassembling."
  Unscrew the tap aerator nozzle at the tip of the spout — dislodged rust flakes or Teflon remnants frequently clog the mesh aerator during plumbing repairs. Rinse the mesh under running water and reinstall.

Wrapping Up

A dripping tap or seeping pipe joint is one of the most beginner-friendly plumbing fixes there is — the real skill is just knowing where your shut-off valve is and being patient with the Teflon wrap direction. Once you've done it once, you'll never need to call a plumber for a simple washer change again.

If you're dealing with hard water scaling or high water bills, you might also want to check out our guides on solving hard water problems and choosing the right water softener and repairing a swollen or jammed bathroom door due to moisture dampness. You can also estimate your exact monthly financial loss from dripping faucets using our interactive tool below.