4” pipe lagging query??

[macka09]

Hi folks
I don’t normally do much pipe lagging but I need to lag some rain water pipe work.

Thing is I’m struggling with lagging the branches properly. Any advice that could be useful?? I’m using foil faced rockwool.

Cheers

 

[ShaunCorbs]

What are you struggling with the dia or the branch bend ?

 

[macka09]

What are you struggling with the dia or the branch bend ?

The branch bend. Cutting the lagging like you would for the usual size pipe just doesn’t work.

 

[ShaunCorbs]

The branch bend. Cutting the lagging like you would for the usual size pipe just doesn’t work.

It won’t as it’s swept so you will have to nibble / curf cut the inside radius

 

[macka09]

It won’t as it’s swept so you will have to nibble / curf cut the inside radius

I thought as much. It’s actually a double branch. Like a big tee with a prodding eye in the end. Bloody nightmare.

 

[Last Plumber]

This may be a silly question but why are you lagging a rainwater pipe?

They are normally empty and when it is raining, it isn't freezing.

Apologies if I have missed the point.

 

[ShaunCorbs]

This may be a silly question but why are you lagging a rainwater pipe?

They are normally empty and when it is raining, it isn't freezing.

Apologies if I have missed the point.

I’m guessing sound is the issue

 

[Last Plumber]

I’m guessing sound is the issue

Good point.
Good thinking Batman!