Secondary meters

[tamz]

You can fit a secondary meter without a met ticket.
2 x 30kw combis will need a flow rate of under 4.5m3/hr if you apply the diversity factor (just over 5.5 if you don't).
Run a 32 PE pipe and you should be able to keep your drop under 1mb.
The volume of 20m of 32mm PE is 0.0106m3 and a U6 meter 0.008m3. Work the rest out for yourself.
Nothing difficult about it.

 

[lame plumber]

bummer, turned down secondary meters in past coz i didnt have the meter ticket.

 

[Danv44444]

You can fit a secondary meter without a met ticket.
2 x 30kw combis will need a flow rate of under 4.5m3/hr if you apply the diversity factor (just over 5.5 if you don't).
Run a 32 PE pipe and you should be able to keep your drop under 1mb.
The volume of 20m of 32mm PE is 0.0106m3 and a U6 meter 0.008m3. Work the rest out for yourself.
Nothing difficult about it.

Thanks tamz. I've never heard of using a diversity factor with gas before? I was just wandering how or when you use it?

 

[tamz]

It tells you about it in BS6400 and also your Viper or Corgi book under low pressure meter installations
You are only supposed to use it if there are more than 2 appliances which can lead to a situation where 2 x 35kw boilers and a 20kw cooker could be run on a U6 (5.9m3/hr) whereas 2 x 35kw boilers on their own (6.46m3/hr) would need a U16.

 

[Reg Man]

Gas meter goes nuts, but still within limits.