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Water wisdom: how to change your hot water tap with a combi boiler and save money

Rob is a seasoned home improvement writer with over 15 years of experience researching and recommending products for the home. Prior to starting Nurturing Homeaid, he wrote extensively for This Old House magazine and has been featured as a home expert on several TV and radio programs. An avid DIY-er,...

What To Know

  • Connect the hoses to the corresponding valves on the combi boiler, using a pipe wrench to tighten the nuts.
  • If you hear banging or whistling noises when the tap is turned on, it may indicate a problem with the water pressure or the combi boiler.
  • Replacing a hot water tap with a combi boiler is a manageable task for the average homeowner.

In the realm of home improvement, plumbing tasks can often seem daunting, but with a bit of guidance, you can conquer them with confidence. One such task is changing a hot water tap with a combi boiler. This comprehensive guide will provide you with step-by-step instructions, empowering you to tackle this project like a pro.

Understanding Your Combi Boiler

A combi boiler is a compact and efficient heating system that provides both central heating and hot water. It utilizes a heat exchanger to heat water directly from the mains supply, eliminating the need for a separate hot water tank.

Materials You’ll Need

Before embarking on this project, gather the following essential materials:

  • New hot water tap
  • Adjustable spanner
  • Pipe wrench
  • PTFE tape
  • Rags or towels

Safety Precautions

Before commencing any plumbing work, it’s crucial to prioritize safety:

  • Turn off the water supply to the tap.
  • Isolate the electricity to the combi boiler.
  • Wear appropriate safety gear, such as gloves and eye protection.

Step-by-Step Guide

1. Remove the Existing Tap

Using an adjustable spanner, carefully loosen the nut that secures the tap to the pipework. Grip the tap with a rag to prevent it from spinning and causing damage. Once loosened, remove the tap from the pipe.

2. Clean the Pipework

Use a rag to clean the exposed pipework, removing any debris or old PTFE tape. This will ensure a proper seal for the new tap.

3. Apply PTFE Tape

Wrap PTFE tape clockwise around the threads of the pipework, creating a seal that prevents leaks. Start the tape approximately 5mm from the end of the thread and overlap it by half with each subsequent wrap.

4. Fit the New Tap

Screw the new tap onto the pipework by hand, ensuring it aligns correctly. Use an adjustable spanner to gently tighten the nut, avoiding overtightening.

5. Connect the Flexi-Hoses

Most hot water taps come with flexi-hoses for easy connection to the hot and cold water supplies. Connect the hoses to the corresponding valves on the combi boiler, using a pipe wrench to tighten the nuts.

6. Turn on the Water Supply

Gradually turn on the water supply to the tap. Check for any leaks at the connections. If you notice any drips, tighten the nuts further.

7. Test the Tap

Run the hot water tap to ensure it operates correctly and delivers hot water. Check for any unusual noises or vibrations.

Troubleshooting Tips

  • Leaking Tap: Tighten the nuts connecting the flexi-hoses or the tap itself. If the leak persists, you may need to replace the washer or O-ring.
  • No Hot Water: Check if the combi boiler is working correctly. Ensure that the water supply and electricity are connected and that the boiler is not in standby mode.
  • Loud Noises: If you hear banging or whistling noises when the tap is turned on, it may indicate a problem with the water pressure or the combi boiler. Contact a qualified plumber for assistance.

Takeaways: Empowering Homeowners

Replacing a hot water tap with a combi boiler is a manageable task for the average homeowner. By following these step-by-step instructions, you can save money and gain the satisfaction of completing a plumbing project yourself. Remember to prioritize safety and seek professional help if you encounter any difficulties.

Quick Answers to Your FAQs

Q: Can I use any type of hot water tap with my combi boiler?
A: Yes, most hot water taps are compatible with combi boilers. However, it’s always advisable to check the manufacturer’s specifications to ensure compatibility.

Q: How often should I replace my hot water tap?
A: The lifespan of a hot water tap varies depending on usage and maintenance. However, most taps should last for several years with proper care.

Q: How can I prevent leaks around the tap?
A: Proper installation and regular maintenance are crucial to prevent leaks. Ensure that the PTFE tape is applied correctly and that the nuts are tightened securely. If a leak occurs, try tightening the nuts further or replacing the washer or O-ring.

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Rob Sanders

Rob is a seasoned home improvement writer with over 15 years of experience researching and recommending products for the home. Prior to starting Nurturing Homeaid, he wrote extensively for This Old House magazine and has been featured as a home expert on several TV and radio programs. An avid DIY-er, Rob takes pride in testing out the latest tools and gadgets to see how they can make home projects easier. When it comes to heating systems, he's evaluated over 50 different furnace and boiler models over the years. Rob founded Nurturing Homeaid with his business partner Jim in 2020 to provide homeowners with genuine product recommendations they can trust. In his free time, Rob enjoys remodeling old homes with his family and traveling to visit architectural landmarks across the country. He holds a bachelor's degree in Journalism from Syracuse University.
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