Gas Hob jet conversion for LPG

[ProDave]

I have a gas hob, currently set up for mains gas. I need to convert it for LPG.  The supplier has just told me no such conversion kit is available.

 

So I have to do it the hard way, work out from the existing jets what sizes the new ones need to be.

 

So the 4 jets currently in the hob are stamped 103,  103,  115  and 72

 

Anyone know how to calculate what sizes I need?

 

Or do I just take a punt and buy this kit and just try it? https://www.ebay.co.uk/itm/LPG-Gas-Jet-Set-4-Burner-Cooker-Hob-Calor-Propane-Nozzle-Conversion-Kit-NEW/222794793274?hash=item33df9ac13a:g:vh8AAOSwp7FaWkSm

[Temp]

This explains what the numbers mean but i think you need to look up the numbers your appliance needs for lpg.

 

https://www.ebay.co.uk/gds/How-to-choose-Jet-Nozzle-for-your-gas-appliance-/10000000202400690/g.html

 

There is a post here...

https://www.navitron.org.uk/forum/index.php?topic=19031.0

That says the number for lpg should be 65-70% of that for natural gas.

 

[Temp]

Perhaps worth pointing out that if you get it wrong your hob might produce a lot of carbon monoxide.

[joe90]

I have just had my rangemaster converted but I have no ideas about numbers, perhaps message the Ebay seller for confirmation that the jets are for your cooker?

[ProDave]

12 hours ago, Temp said:

Perhaps worth pointing out that if you get it wrong your hob might produce a lot of carbon monoxide.

You can tell a lot from the flame colour, if it burns with a yellow flame I would be worried.

 

And there will be a CO alarm not far away

[ProDave]

12 hours ago, Temp said:

This explains what the numbers mean but i think you need to look up the numbers your appliance needs for lpg.

 

https://www.ebay.co.uk/gds/How-to-choose-Jet-Nozzle-for-your-gas-appliance-/10000000202400690/g.html

 

There is a post here...

https://www.navitron.org.uk/forum/index.php?topic=19031.0

That says the number for lpg should be 65-70% of that for natural gas.

 

The jets in the Polish ebay kit are in the range 65-70% so I think I will proceed and buy that.

[ProDave]

Just to finish this off, I fitted the new jets today.

 

Here's what I ended up with:

 

Mains jet size   LPG jet aize

103                      67

103                      66

115                      86

72                        50

 

I had bought a pack of 6 jets which gave me a few more options to play with.

 

All seems to be working fine.

 

[Temp]

Jolly good. If your hob is on cylinders I think you will be surprised how little gas a hob uses. Ours gets a lot of use and a 47kg cylinder lasts at least 18 months.