Steel pipe removal

Types of steel pipe found in Israel

Galvanised steel for hot and cold water

Silver-grey with a zinc surface. Standard in apartments from the 60s to the 90s. Diameters 1/2", 3/4", 1". Joints are threaded with linen or hemp packing.

• Service life 30–50 years (then it clogs from the inside and leaks).
• After 30+ years removal is tough — threads are welded shut by corrosion.

Black steel for heating

Black, no coating. Often welded, sometimes threaded. Used in central heating systems (in Israel — northern towns, villas with a gas boiler).

Cast iron for drainage

Thick, dark-grey pipes. Historically in bathrooms and toilets of old Tel Aviv and Haifa buildings. Lasts forever but brittle under impact and during removal.

Stainless steel

Rare in Israeli residential systems, more common in industrial or restaurant kitchens.

Why steel is harder to remove than anything else

• Threads seize up. Hemp + paste + 30 years + hard water = the joint becomes a single block of metal. Unscrewing without heat is impossible.
• Weight. A metre of 1" galvanised pipe weighs 2.4 kg. 40 metres of distribution is 100 kg. In a tower block you need a relay to carry it down.
• Internal rust. Even if the outside looks fine, the inside can be flaking. Cutting through releases chunks and dirty water.
• Welded seams. Only cut with an angle grinder and metal disc — loud, sparks, dust.
• Sharp edges. Cut pipes have razor edges — easy to cut yourself.

Tools and methods

Threaded joints

1. WD-40 or penetrating oil applied to the thread, left to soak 1–2 hours.
2. Heating with a torch. The plumber heats the coupling carefully — the steel expands and releases the thread. Heat must be kept away from drywall and wiring.
3. Pipe wrenches. 30–50 cm long, used in pairs (one holds one side of the joint, the other turns). Short wrenches will not cut it.
4. Cutting the pipe is a last resort if the thread refuses — angle grinder next to the fitting, then the threaded stub is unscrewed separately.

Welded seams

1. A straight cut with an angle grinder and metal cutting disc.
2. In awkward spots — band saw or metal hacksaw.
3. After cutting — edges are dressed so no one gets hurt during removal.

Cast iron

1. Angle grinder with metal disc — slow and dusty but it cuts.
2. Never "snap it off" — pieces are heavy and shrapnel flies.
3. After cutting — carry out as a crew (nobody lifts a 1.5 m cast-iron piece alone).

How the work unfolds

1. Shutting off water/heating. Apartment valve and/or riser.
2. Full system drain through drain taps or mixers.
3. Protecting the space. Plastic on the floor, furniture covered, ventilation (for dust).
4. Route marking. What comes out, what stays (riser usually stays, so do inter-apartment mains).
5. Removal by the methods above — unscrew, heat, cut.
6. Stacking. Pieces in a designated spot (not on fresh floors or furniture).
7. Capping remaining outlets. A temporary plug goes on the riser, or the new pipework is connected right away.
8. Hauling away. Steel usually goes to scrap — galvanised 1.5–2 ILS/kg, black steel 1–1.5 ILS/kg, cast iron 1.5–2 ILS/kg. Part of the removal cost is recovered this way.

How much it costs in Israel

• Galvanised distribution removal in a 2-room flat (exposed runs + chases) — 1,500–3,500 ILS
• Galvanised in screed — 2,500–5,500 ILS
• Cast-iron drainage (bathroom + toilet) — 1,800–4,500 ILS
• Black steel heating (loop + radiators) — 2,500–6,000 ILS
• Single steel section (threaded joint swap during a repair) — 300–700 ILS
• Heat and unscrew a seized joint (as a standalone job) — 200–500 ILS per joint
• Steel scrap disposal — often 0 ILS (the plumber keeps it), sometimes -50 to -200 ILS (partial refund)

Safety

• Gas torch inside an apartment. No flammables nearby (parquet, paint, plastic pipes from other systems). A heat-shield is needed.
• Angle grinder. Sparks fly 3–5 metres. Eye protection and a respirator are mandatory.
• Heavy pieces. Take them off the wall in pairs, never alone.
• Sharp edges. Cut-resistant gloves for everyone handling the pieces.
• Dust. Respirator, ventilation. Rust dust is not instantly toxic, but chronic exposure is bad.

What to replace it with

• PEX — the modern default. Flexible, reliable, 50+ years.
• Copper — premium if budget allows. Neat finish, proven reliability.
• PVC drainage instead of cast iron — cheaper, lighter, no rust.
• Don't replace "like for like". Modern galvanised isn't what it used to be — thin Chinese stock, same pinholes in 15 years.

Typical mistakes

• Skipping the heat. A thread snaps on an adjacent section (caught in the twist) — you end up replacing more than planned.
• Grinder without surface protection. Sparks land on parquet or laminate — burn marks.
• Damaging the riser. Separating too aggressively from the riser damages the building line — Vaad Bayit liability and neighbour lawsuits.
• Mixing scrap metals. Copper and steel thrown in together — you lose value. Sorting adds 100–300 ILS back to your budget.