Tightness Test Query

[stratplus]

Scenario:

Service/Cp12.

Tightness test, E6 meter with boiler and cooker.
1 mb drop found over 2 mins no smell of gas.
Acceptable drop.
Disconnected cooker, re-tested.
2 mins no drop.
Would you turn cooker off?
Or re-connect and just record the drop on the CP12 in the TT section.

 

[stratplus]

It was my understanding that a TT is not a legal requirement when doing a CP12, provision is made on the cert but its not a requirement but we all do it !

Out of curiosity, what did you do?

Bea

Out of curiosity, what did you do?

Bear in mind this post was only a scenario of correct procedures to adopt should this happen.
I would be curious as where the drop was and if found to be on cooker, because you have confirmed leak was on cooker you’d over ride the permissible drop and have to act accordingly.

 

[Last Plumber]

Because I had disconnected and found it to be dropping on the cooker

It sounded like we were discussing something you'd done!

Are you telling me/us that this was some made up exercise ?

 

[stratplus]

It sounded like we were discussing something you'd done!

Are you telling me/us that this was some made up exercise ?

I’m always thinking of things that you could come across. The what ifs.
Tbh the way I see it is if I had an acceptable drop of say 2mb with no smell of gas and a cooker was installed I’d be curious as to where it was. It takes seconds to disconnect a cooker from a bayonet.
Now, if I still had the drop after disconnecting i may or may not choose to isolate the boiler and re-test.
Now....if the drop was still there that would leave the meter or pipework.
I understand you can’t have any drop on the pipework so if after isolating the meter the drop was on pipework you’d have to trace and repair.
The original scenario was if a drop was found on the cooker.
Cookers could form leaks all over at worn taps etc and this is accepted which is one of the reasons you are allowed the permissible drop. (As I understand it).
So.. this is the reason for the original scenario.
Would it still be acceptable to re-fit cooker knowing there was a permissible drop OR now you’ve identified it should you isolate.
Totally understand the “why are you isolating with.a permissible drop” posts but like I said this is just a “scenario”.
Hope that makes more sense?

 

[Last Plumber]

Hope that makes more sense?

I don't suppose it does any harm to 'think'

Domestic tightness tests are simplified and generalised methods that are intended to be foolproof.

There is always the possibility that a leak which is classed as 'within tolerance' is actually dangerous.

Even so, 1 or 2 Mb drop on a typical domestic installation running on an E6 is well within the permitted leak rate and is highly unlikely to cause an issue.

 

[firemant]

The post quoted below suggests that you DID actually do the scenario.

Whatever, once you find there is a carcass leak you cannot ignore it. Do don't do it. IMO

 

[firemant]

That’s exactly what I thought. Because I had disconnected and found it to be dropping on the cooker. The permissible drop is alliances connected.

This is your response I refer to on my previous post.

 

[stratplus]

The post quoted below suggests that you DID actually do the scenario.

Whatever, once you find there is a carcass leak you cannot ignore it. Do don't do it. IMO

Carcass leak yes. Scenario is if leak is found on cooker not carcass. Can you re-connect cooker and record it, that is the scenario. And no this wasn’t anything I had done.

 

[firemant]

You really are confusing us.

So you DID find that there is an escape on the carcass, by removing the cooker?
What did you do.?

If the leak is on the cooker,then, yes you can reconnect. But, as I said, I would never have disconnected it to to test, as if the leak WAS on the carcass, then you have to leave off, with permission.

So there never is a win in disconnecting

 

[stratplus]

You really are confusing us.

So you DID find that there is an escape on the carcass, by removing the cooker?
What did you do.?

If the leak is on the cooker,then, yes you can reconnect. But, as I said, I would never have disconnected it to to test, as if the leak WAS on the carcass, then you have to leave off, with permission.

So there never is a win in disconnecting

Nevermind

 

[firemant]

Nevermind

FFS

 

[firemant]

Stratplus: I note you have disliked everyone of my posts.

You have demonstrated your lack of knowledge, and that is fair enough - a forum is there to engage and help.It is better to ask than get it wrong.
But you are ducking and diving, and your untruths are confusing yourself as well as me.

I don't know how I will get through the day with all the worry about the thumbs down.