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How to replace a Toilet Inlet Valve in Singapore

If your toilet won’t stop filling, sounds like it’s constantly running, or flushes weakly — the inlet valve might be the problem. Thankfully, replacing a toilet inlet valve is a simple, affordable DIY job you can do yourself in under 30 minutes — no plumber needed!

In this guide, we’ll walk you through how to replace a toilet inlet valve in Singapore, step-by-step, using common tools and parts available at local hardware stores or online.

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🛠️ What Is a Toilet Inlet Valve?

The inlet valve (also called a fill valve) controls the flow of water into the toilet tank. It opens after a flush to refill the tank and stops when it reaches the proper water level.

If the valve is faulty, you might experience:

Constant running water 💧

Weak flushes 🚽

Overflowing tanks ⛔

What You’ll Need

  • A new toilet inlet valve (most SG toilets use standard sizes — check your brand or take a photo to match)

  • Adjustable wrench

  • Bucket or towel (to catch drips)

  • Sponge or small cup (to remove excess water from tank)

💡 You can find replacement valves at places like:

  • Self-Fix DIY

  • Home Hardware

  • Shopee / Lazada

  • NTUC FairPrice (some branches)

🪛 Step-by-Step: How to Replace a Toilet Inlet Valve

✅ Step 1: Turn Off the Water Supply

Look for the small valve on the wall near your toilet bowl. Turn it clockwise to shut off the water. Flush the toilet to drain the tank completely.

🧽 Use a sponge or cup to soak up any leftover water in the tank.

✅ Step 2: Remove the Old Inlet Valve

  • Disconnect the water hose connected to the bottom of the tank

  • Unscrew the plastic nut holding the inlet valve in place

  • Lift the old valve out from inside the tank

⚠️ Be careful — some water may leak out.

✅ Step 3: Install the New Valve

  • Insert the new valve into the same hole in the tank

  • Adjust the height if needed, so the water line is below the overflow tube

  • Secure it with the plastic nut from underneath (hand-tighten, then give it a slight turn with the wrench)

✅ Step 4: Reconnect the Water & Test

  • Reattach the water hose

  • Turn the water supply back on

  • Let the tank fill and check for any leaks around the base

✅ Step 5: Adjust the Water Level

Most valves have a small float or screw to adjust the water level. Set it just below the top of the overflow tube for the best flush.

🎉 Done! Your toilet is now working efficiently again — and you just saved on plumbing fees.

🧼 Bonus Tips for Singapore Homes

  • Use descaler tablets every few months to keep valves clean (especially with Singapore’s hard water)

  • If your toilet bowl brand is Toto, American Standard, or Baron, check if a specific valve model is recommended

  • For rental units, always inform your landlord before making changes

💬 When to Call a Plumber

If you:

  • Still hear water running after replacement

  • See leaks from the base of the toilet

  • Can’t locate or turn off the water supply

…it might be time to call a licensed plumber.

 
 
 

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