Low gas pressure

[ShaunCorbs]

Shaun would you reckon blasting it with a compressor is worth doing? I think the guy doesn't want pipework going around his house

I would install a test nipple below boiler least you know then if it's the boiler or Pipework

 

[ShaunCorbs]

But if it's slow to react, when the boiler fires up the WP at the meter drops for a second and the Hob goes out

Think it's steady and not just on start up

 

[jaydebruyne]

But if it's slow to react, when the boiler fires up the WP at the meter drops for a second and the Hob goes out

The hob only goes out on simmer.

 

[jaydebruyne]

But if it's slow to react, when the boiler fires up the WP at the meter drops for a second and the Hob goes out

The hob only goes out on simmer.

 

[Leo21]

The hob only goes out on simmer.

That special soumds like a dicky hob. Cut a test nipple just underneath the ISO and re test.

 

[Leo21]

The hob only goes out on simmer.

That special soumds like a dicky hob. Cut a test nipple just underneath the ISO and re test.

 

[jaydebruyne]

That special soumds like a dicky hob. Cut a test nipple just underneath the ISO and re test.

I've ID'd the hob. But still getting 5.5mb drop from meter to boiler inlet after disconnecting the hob from the supply. To be honest I'm not really worried about the hob, they can just buy a new one. But I need to sort the pressure issue.

So it's either try and clear the blockage, if there is one, or do a complete new run.

Just toying wether to get a compressor to blow out any blockages :/

 

[jaydebruyne]

Vaillant reckons the boiler needs 28mm from the meter... gonna calculate it properly when I get home as forgotten how to do it :/

 

[ShaunCorbs]

Vaillant reckons the boiler needs 28mm from the meter... gonna calculate it properly when I get home as forgotten how to do it :/

What's your total length and how many elbows ?

 

[jaydebruyne]

Let's say 6m, accessible elbows = 10

 

[ShaunCorbs]

22 more than good enough pressure drop of 0.73 aprox

At 32kw 8m 12 elbows

 

[jaydebruyne]

Oooh is that an app?? What is the app called?

 

[jaydebruyne]

Don't forget the 7kw net hob

 

[ShaunCorbs]

Don't forget the 7kw net hob

Allowed 5kw as most I find are about that can do you one for 40kw to be sure

 

[Riley]

What Are you distances again mate

 

[ShaunCorbs]

What Are you distances again mate

8m and 10 elbows mate

 

[jaydebruyne]

Allowed 5kw as most I find are about that can do you one for 40kw to be sure

View attachment 28762

What app is that Shaun?

 

[ShaunCorbs]

What app is that Shaun?

Mr combi pipe calc / gas calc

 

[ShaunCorbs]

What app is that Shaun?

Mr combi pipe calc / gas calc

 

[Riley]

22 more than good enough pressure drop of 0.73 aprox

At 32kw 8m 12 elbows

View attachment 28761

Exactly what I used