A ball valve is the plumbing part you only remember when it fails. And it fails at the worst possible moment: "shut off the apartment" — you try to turn the handle, it spins uselessly or breaks off completely. Replacement costs 150–400 ILS and takes 30–60 minutes, but valve choice and placement determine whether it works in five years or seizes up again.
Where ball valves live in an apartment
- Apartment inlet — one or two valves (cold + hot) right after the apartment entry. The most important ones: they shut off the whole apartment.
- Isolation valves under mixers — 2 valves under every basin (hot and cold), on the flexible hoses to the mixer.
- In front of the boiler — on the cold inlet, often on the hot outlet as well.
- In front of the washer/dishwasher — one valve per supply hose.
- At the toilet — an angle valve in front of the cistern.
- At the manifold — a valve per outlet in a manifold layout.
- Balcony/yard — for watering or washing the car.
Why a valve "dies"
- Limescale. Hard water in Israel (250–400 ppm) deposits lime inside the valve. Over time, the ball locks up and the handle won't turn.
- Brass corrosion. Cheap valves (uncontrolled Chinese origin) use low-grade brass. After 5–8 years, it starts crumbling from the inside and pinholes appear.
- Electrolysis in mixed-metal systems. If the line combines steel + copper + brass, weak galvanic current eats one of them.
- Seizing from long-term disuse. If a valve isn't operated for 5+ years, rubber seals bond to the ball and the handle won't move.
- Water hammer. Sharp pressure spikes wear out the internal seals.
- Stripped thread from over-tightening during installation.
Ball valve types
Full bore vs. standard bore
Full bore means the internal diameter matches the pipe — minimal pressure loss. Standard bore is narrowed. For the apartment inlet, always use full bore; standard bore is acceptable on small branches.
By handle type
- Lever ("butterfly") — flat handle, position is obvious (open/closed). Standard.
- Round lever — handier in tight spots.
- Slow-close — soft-closing action, prevents water hammer. Useful in front of a washing machine.
By thread type
- Female × female (FF) — the most common type for the apartment inlet.
- Female × male (FM) — transitional, for non-standard joints.
- Union-type (split body) — with a union nut for quick removal without touching the thread. Good in front of a boiler, mixer, or appliance.
Brands
- Bugatti (Italy) — premium, 20+ years.
- Valogin (Israel) — local manufacturer, good price/quality ratio.
- Tiemme, Far, Giacomini — mid-tier Italian.
- No-name "China" — from 25 ILS but rated for 3–5 years. Fine for temporary needs, not for risers and critical locations.
How the replacement goes
- Water shut-off. If replacing the apartment inlet valve — the building-wide riser has to be shut (arrange with the Vaad Bayit and neighbors: "we'll kill the water for an hour"). If under the sink — only the apartment valve.
- Drain the system. Open a low tap so the water above drains out.
- Unscrew the old valve. With a pipe wrench. If the thread is seized — WD-40, heat with a torch (carefully), unscrew gradually.
- Check the thread on the mating pipe. If the thread is stripped, re-cut it with a die or replace the pipe section.
- Thread sealing. Flax + paste (the Israeli standard) or PTFE tape with a sealant (Loctite 55, Unipak).
- Install the new valve and tighten to the right torque (no over-tightening, typically 2–3 turns past hand-tight).
- Turn the water on and check the joint for leaks.
Pricing in Israel
- Replacing a single under-sink isolation valve — 150–300 ILS (labor) + 30–100 ILS (the valve)
- Replacing an apartment inlet valve (cold/hot) — 250–500 ILS + 80–200 ILS valve (with riser shut-off)
- Replacing a valve in front of a boiler/appliance — 200–350 ILS + 60–150 ILS
- Replacing a seized valve with pipe section replacement (damaged thread) — 450–800 ILS
- Several valves in a single visit — labor discount: all valves at 100–150 ILS each plus a 200–300 ILS call-out
- Full inlet assembly swap (2 valves + filter + reducer + meter if needed) — 800–1,800 ILS labor
DIY replacement mistakes
- Water not shut off. Surprise: when you unscrew the valve, it turns out it wasn't shutting off everything and you get soaked.
- Over-tightened thread. A brass valve cracks across the body under over-torque — water seeps through the crack.
- Old flax/sealant not removed. The thread doesn't seal properly.
- Wrong-size valve bought. In Israel it's typically 1/2" or 3/4" — measure carefully, don't rely on memory.
- Ordinary valve in front of a boiler. A check valve + safety valve is required — a plain shut-off isn't enough.
How to extend valve life
- Turn it 1–2 times a year — so it doesn't seize. Even without a need, just shut off and open it again.
- Don't over-torque the handle at the stop. That's the closed position, no further travel — extra force breaks the stem.
- Install a coarse inlet filter — less grit inside the valve.
- Swap plastic handles for metal ones on critical valves — they don't snap off in an emergency.
Frequently asked
How do I know the valve needs replacing?
Tell-tale signs: the handle turns but water doesn't fully shut off; the handle is stiff and needs two hands; drips under the handle (stem seal); visible corrosion on the body. If any one is present — plan a replacement within a month.
Who shuts off the riser when the apartment valve is being replaced?
Usually the plumber arranges with the Vaad Bayit or finds the valve in the basement/roof. In large complexes a request to the management company may be needed a day or two in advance. In smaller buildings — the plumber goes and shuts it down (neighbors on the floor are notified). Plan the replacement for a weekday morning.
Can I install one large valve instead of two (cold + hot) at the inlet?
No — these are separate lines, they must be shut off independently. A single valve for two lines is physically impossible (they're not connected before the boiler). Two separate valves are standard.
How long does a quality ball valve last?
A European brand (Bugatti, Tiemme) — 20–30 years if it's exercised 1–2 times a year and the water isn't aggressive. Israeli Valogin — 15–20 years. Chinese no-name — 3–7 years. Price difference 30 vs 150 ILS, lifespan difference 3–5×.