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I received the new NG manifold. It came with continuously variable valves and the performance was a night and day difference. I’ll try to post a few pics of the valves for future reference below: This is the valve from the LP manifold: And this is the valve from the new NG manifold:

I’m a big HF fan for many things but I just seem to go through bits too fast. I may splurge on a Viking set. I can get very creative in justifying discretionary expenses...as you can tell from my conversion gone awry.

Funny you should say that, I was actually just looking at investing in a numeric drill bit set. I’m constantly going through cheap bit sets. Anyone have any thoughts on Viking Norseman?

It would be good to know the differences in the sizes of the holes in the valves, but there’s no hurry since I ordered the NG manifold. I may try to measure myself when I get the new manifold but quite frankly I’m not sure that me or my cheap digital caliper can measure a circular hole with...

And in the spirit of internet lore, this is now officially the most expensive NG conversion that mankind has ever known. Hopefully the info will ultimately benefit some others contemplating Summit conversions. To add insult to injury, I received this Summit in mid 2010 and I recall the...

Drilling out the small orifice on the valve looked fairly easy as it appears to have a thin aluminum (?) insert, not so much with the medium orifice which was drilled all the way through the fairly thick sidewall of the valve. I don’t think you could consistently do a good job reaming out the...

You mean the low and medium orifices (holes) in the valves? I thought the NG manifolds had the continuously variable valves (one hole with a concentric groove around the circumference).

I am using a 3/8” NG hose. Perhaps I need a 1/2” NG hose?

Well, I fired it up. All the burners seem to have good flame heights on medium and high but they do have low flame heights on the low settings. I can't get any to snuff out, but the flame heights are like 1/4". I have a brand new natural gas S-670 here as well (long story) and on the low...

I’ll let you know how it goes. One additional question. Did you try to adjust the “carburation” (air damper) on the units that you could not get to work right?

My main orifices were sized for a 5” WC regulator. I would think smaller WC sizing would result in larger orifice holes, so I think I’m better off with them being sized to 5” WC as opposed to 7” WC?

Wonderful, so I may need to drill out some of the holes on these valves. I assume the safe bet is to see how it performs before doing any surgery, correct?

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My Weber LP Summit, purchased new in the July 2010 timeframe, has 3 holes in the valves, but the upper one has a groove over it (to the left and right of it), and there are no distinct clicks at low, medium and high settings. So are these “fixed” or “continuously variable”? I’m attempting a...

Good advice, was reading up on this issue last night. In the event my low flames do not look good, I’ve seen a couple of folks saying they’ve had success with slightly enlarging the low and medium holes on the valve, but it doesn’t sound like an exact science. Are there any posts/instructional...

Nevermind, found it, had to remove the rear panel on the grill to get to it.

Dave: Thanks for all the feedback. My valve cones look like a hybrid of the 3 hole and continuously variable type. There are 3 holes but there also grooves in the side of the cone. It may not work but I decided to give it a shot. All of the orifices have been swapped out except for the...

Great, thanks! Who sells the Weber NG orifices and NG regulator/hose I would need to do this? Weber will not sell them since my registered grill is LP.

Can you clarify how I would determine this? Not really sure what you mean by cone, I’ve never had the valves apart before. Does anyone have any pics so I know what I’m looking for? Mine is a post 2007 model so I think it has variable. If I can confirm that it is variable does anyone have any...

I’m looking to convert my LPG Summit to NG. Does anybody have the necessary parts for sale?