Insulating plastic CH pipes

[rob_j20]

Considering how lazy the install looks. You sure he has used pipe inserts.

 

[BloodAndBandages]

So he is going to come and lag them?

Yes he is! Armed with the knowledge supplied in this thread I send him a polite but firm missive - he didn't resist!

 

[BloodAndBandages]

Considering how lazy the install looks. You sure he has used pipe inserts.

I would hope so! I have no idea how I could tell - would they not leak?

 

[rob_j20]

They might not leak straight away, that's the problem.
Remove one fitting and look in the pipe, obviously not easy if the system is full. But it's an area they skimp on because it's not easy to see there missing until it starts leaking.

If I weren't doing mine myself I wouldn't trust anyone unless they had some pride in their work.

 

[BloodAndBandages]

They might not leak straight away, that's the problem.
Remove one fitting and look in the pipe, obviously not easy if the system is full. But it's an area they skimp on because it's not easy to see there missing until it starts leaking.

If I weren't doing mine myself I wouldn't trust anyone unless they had some pride in their work.

Not really an option as the system is full now! I will ask him when he comes back... but surely as a Gas Safe registered engineer this is not something he should be skimping on!

 

[Agile]

It takes a lot of care and attention not to miss one!

Problem is you cannot tell without taking a joint apart!

They can then fail at ant time, including years later.

But more of a problem on mains water where high pressures can be experienced. On CH systems the pressure rarely exceeds about 2.0 bar when well operated and maintained.

Tony

 

[rob_j20]

It takes a lot of care and attention not to miss one!

Problem is you cannot tell without taking a joint apart!

They can then fail at ant time, including years later.

But more of a problem on mains water where high pressures can be experienced. On CH systems the pressure rarely exceeds about 2.0 bar when well operated and maintained.

Tony

That's why I like the hep2o idea, twist the pipe and it rumbles so you know it has an insert. I guess as a diy I will be putting a lot more attention to it though. But the amount of horror stories is huge, and seems to be the reason a lot say plastic is rubbish, it's the installation that's usually rubbish.

 

[motorbiking]

One last thing to check.. there are two types of pipe lagging "economy" and water bye law 49 compliant. The economy is cheaper and less effective.

 

[rob_j20]

Does this brand of pipe have the barrier in it? Should be able to check that written on the pipe.

 

[BloodAndBandages]

Does this brand of pipe have the barrier in it? Should be able to check that written on the pipe.

Yes - I checked that - definitely barrier pipe.

 

[BloodAndBandages]

One last thing to check.. there are two types of pipe lagging "economy" and water bye law 49 compliant. The economy is cheaper and less effective.

Thanks for the tip - I will make sure he brings the right type.

 

[Roger928]

I thought byelaw 49 related to sewage?
https://pla.co.uk/assets/byelaw49draftwebguidancenoterev2.pdf

If you wanted to fit quality tube insulation you'd be using armaflex.
Like this...

 

[BloodAndBandages]

I thought byelaw 49 related to sewage?
https://pla.co.uk/assets/byelaw49draftwebguidancenoterev2.pdf

If you wanted to fit quality tube insulation you'd be using armaflex.

Byelaw 49 mentioned here:

http://www.screwfix.com/p/climaflex-pipe-insulation-28-x-19mm-x-1m-48-pack/99726

 

[Roger928]

It will do the job I suppose.

 

[John D v2.0]

The bylaw one is for water supplies that might freeze, but of course it's better insulation in general. I wouldn't worry so much for heating although I forget whether the building regs have any specification on that. I'd just insulate the hot water supply pipes and keep the rad pipes inside the insulation, but as it's a retro fit insulation it's up to you what you insist on.