We have a 4' Interior Diameter firepit to build. I'd like the ability to burn either wood or gas. We have the gas line run to the pit. I've been searching on the Internet and I can't find plans or a kit that I like.

My vision is a stacked stone firepit about 18" high with a seat wall type cap. We will probably use something like the Belgard Celtik stones.

Here are a couple photos I pulled off the net:

#1 - I like the look of this one, but not flush with the ground
#2 - The BBQ insert on this one looks interesting. I wonder if the whole metal insert can be easily removed and replaced
#3 - It looks like you can almost pull out the gas burner. But I don't know how you would seal it and protect the gas line

The problem with wood in our area is sparks. Legally, you need to have a spark arrester on these if burning wood. The nice thing about gas is that there is no smoke or sparks, and you do not have to tend them all the time like wood. They don't smell as nice, but they allow you to sit and relax and enjoy your guests without the interaction a wood burning one requires.

I picked up a wood burning one at Lowes and converted it to gas (you also have to use Natural gas, as propane "puddles" and can explode!). I'll try and post a pic later, if it helps. It's not really the design it sounds like you are looking for, but it might give you some ideas!

Yea, post a photo of what you find.

I've been searching on the internet without much luck. I did find this cool pit:

http://www.dancingfire.com/firepit_tank

My thought right now is to build a pit out of these blocks:

http://www.allanblock.com/Literature/PD ... re_Pit.pdf

I'll get it all setup and working as a gas pit, then see if we can fabricate a steel insert to allow wood burning (or maybe a free standing portable pit like the one in the top left photo).

Kinda crappy iPhone pics (and dirty from the rains ), but here's a couple pics of mine. IIRC, the firepit itself was under $100.00. The glass, on the other hand, was about $300.00

Hope it helps!

Here's a night shot.

I'll bump this back up to the top.

We got this far and now I don't know what to do. I think it will be a little too high once we install the cap. It won't be too difficult to tear out one run of blocks. The interior is 48" and the blocks are about 9" wide. I think I'm going to pour a cap in place just like the pool coping (styrofoam forms). I still don't have a solution on the Gas + Wood thing.

How tall is it now? I don't think it would be too high if you keep your cap reasonable 2-3" thick maybe?

What are you planning on filling it with? Loose rock to a point and then Lava rock or glass?

I think it is about 20", I don't have an exact measurement. The plastic adirondack chairs in the photo are a little low to the ground. But with a row of pavers on top of the wall it is a little uncomfortable to kick up your feet. I plan to get some nice wood chairs at some point, but that project is about 8th ot 9th on the list at this point.

The initial plan is to fill most of the bottom with pea gravel, enough to bring it within a couple inches of the burner. Put a couple inches of sand under the burner and another inch or two on top of the burner. The probably finish it off with large chucks of lava rock.

Yeah it's hard to tell from the pics. And it's also personal preference of course.

Where are you putting the gas valve? Access panel on the side, or a recess/indent space at the top?

How far below the top will you place the burner?

The gas is already there, you can see the keys hanging from the gas line (valve is on the back side of the pit). I can put the burner at any depth I want (because I'm probably going to need to move it). If I leave everything as it sits and just add the cap it will be about 8-10 inches below the top.

Ahh I thought it was just stubbed out without a valve yet. So it looks like the gas line runs up those channels. Those blocks make that easy Did you put the valve at the elbow or lower down? Will you use flex line for the rest or hard plumb to the final elevation if you change it? So many variables to consider.