How well does bunging the cold feed and Open vent work

Last Plumber

Esteemed

Plumber

Gas Engineer

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4,850

• Jul 16, 2024

• #2

It can work OK but it depends on the system. You will know pretty quickly whether it is going to be successful or not.
It is worth a try but I wouldn't mess about for more than 15 minutes, if it is not slowing down to what you would experience on a sealed system by then, leave it and drain it or freeze it.
Only my opinion from my own experiences.

 

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C

Chuck

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3,017

• Jul 16, 2024

• #3

Ask 'If the bung did start leaking in the middle of this exercise, how bad would it be?'. If the answer is anything worse than 'Not a problem', I'd recommend draining/freezing.

 

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Matt0029

Gas Engineer

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1,177

• Jul 16, 2024

• #4

It wouldn't be too much of a problem as under the floor. I've never used the bungs before. I know things usual seals off quiet well on a sealed system.

 

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Matt0029

Gas Engineer

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1,177

• Jul 16, 2024

• #5

Have got a freezer rothenberg electrical one

 

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J

Jerry

Gas Engineer

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346

• Jul 17, 2024

• #6

Drain down system.

Wet vacuumn out the pipes if needed.

Fit rad.

Add inhibitor.

Refil

On to the next one.

 

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Matt0029

Gas Engineer

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1,177

• Jul 17, 2024

• #7

Ended up being a one pipe system 😩. I froze it on each leg with the rothenberg turbo electric freezer. Was to be able to solder around 30cm away on. Put a wet grab between soldering area and freezer.

 

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Matt0029

Gas Engineer

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1,177

• Jul 17, 2024

• #8

Had a terrible do once re-filling a vented micro bore system. But I think micro bore on vented are ment to be hard work all the time

 

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