Weber Sear Zone burners and orifices


 
G

GTNewton

New member
On the newer Weber Spirit 4 burner grills with 2 Sear Zone burners, are the Sear Zone burners and/or orifices different or are the Sear Zone valves different to provide bigger flames?
 
I think (not sure) the "sear zone" is simply an extra burner stuffed in between. If you're asking to change fuel types think twice. In most (nearly all) Weber grills they make them so a simple orifice swap will not work properly
 
LMichaels said:
I think (not sure) the "sear zone" is simply an extra burner stuffed in between. If you're asking to change fuel types think twice. In most (nearly all) Weber grills they make them so a simple orifice swap will not work properly
Click to expand...

This new Weber Spirit model is an EP-425 and I'm converting it from propane to natural gas.
I was told years ago just the orifices need to be changed on a Weber grill but that might be only for grills that don't have these new sear burners. They're not extra in-between burners like some other grills. These Sear burners are 2 burner tubes of the 4 total burners.
The controls for the 2 sear burners can be turned up higher for sear so maybe it’s just giving them more gas and the orifices are the same?
 
GTNewton said:
This new Weber Spirit model is an EP-425 and I'm converting it from propane to natural gas.
I was told years ago just the orifices need to be changed on a Weber grill but that might be only for grills that don't have these new sear burners. They're not extra in-between burners like some other grills. These Sear burners are 2 burner tubes of the 4 total burners.
The controls for the 2 sear burners can be turned up higher for sear so maybe it’s just giving them more gas and the orifices are the same?
Click to expand...
Again, pay heed to my caution I posted. In pretty close to 100% of the cases you CANNOT SAFELY or effectively convert a Weber grill from LP to NG or NG to LP with a simple orifice change. Anyone who tells you otherwise does not understand what they're doing or the possible dangers they're placing people in with bad advice. Unless you TRULY understand working with gas flow and pressures the ONLY safe way to do this is with a replacement manifold and proper fittings/lines for the desired fuel type.
If you research this forum many of us (in particular myself and the owner operator of this forum Chris) have gone to great lengths to outline all of this.
Sorry but you need to not pay attention to YouTube and or Amazon where shysters will try and sell you stuff that could very easily put you in danger.
 
Larry is right of course. The manifold you would need is part #2401687 and its noteworthy that it is called "Manifold, NG, 4 burner w/boost" The burner part number is the same for the NG & LP versions. So the "boost" comes from the manifold.
While I'd be willing to wager that the difference between "Manifold, NG, 4 burner w/boost" and "Manifold, LP, 4 burner w/boost" is simply the orifice size; the fact that Weber doesn't sell them or approve of their sale means you wont find a trustworthy source. Swapping manifolds is super easy. But since this is a newer model I don't see the manifolds readily available online. For older or more common models they are.
 
LMichaels said:
I think (not sure) the "sear zone" is simply an extra burner stuffed in between. If you're asking to change fuel types think twice. In most (nearly all) Weber grills they make them so a simple orifice swap will not work properly
Click to expand...
Larry quickly sniffed out the intention of conversion here. I was simply wondering if he was curious as to their functionality. As I am too.

It would be an interesting valve to take apart and see how it functions. Because if it goes IIRC 40% more (i think I had read that before), or maybe its 20% per burner. How do they get that type of increase, without the change of orifice sizing? Bigger veins in the valve would allow more gas, but isn't the orifice is the ultimate meter/restriction?
 
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