Log Lighter

The Rumford Store
Log Lighter Valve
3/20/08

Key operated gas valve
Model 10721 (brass)...........$26.00
Model 10720 (chrome).......$26.00
Add $10.00 shipping within continental US. See details
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Recommended Installation Instructions
Plumb log lighter valve to 1/2" gas line in floor or wall within two feet of fireplace opening.
Run 1/2" gas line from valve under floor and stub up 2" centered left and right in the inner hearth two inches forward of the fireback.
Cap stub-out with 1/2" cast iron gas cap.
Drill two 1/8" holes in gas cap for "V" flame
For gas log set, omit gas cap and attach stub-out to burner as shown in Gas Log Instructions.

Gas Line Size
A one half inch gas line is typical and seems to be adequate for any of our Rumford gas log sets which put out from about 90,000 BTUs for the smaller sets to about 200,000 BTUs for the larger sets. Here is a discussion we found at http://ths.gardenweb.com/forums/load/plumbing/msg0817323129011.html that may help anyone who wants to determine the gas line size for themselves.
Size of gas line for 150,000 btu bbq
Posted by lazypup (lazypup@yahoo.com)
Fri, Aug 18, 06 at 18:52
The Code procedure for determining the size of gas lines is:
1. Determine the appliancd BTU demand per MFG specifications.
2. Determine the BTU/Cu.ft value of the gas from the local gas supplier. (typically 1,100btu/cu.ft)
3. Divide the appliance BTU by btu/cu.ft to determine appliance demand in cubic feet.
4. Measure the total developed length of pipe run.
In this example the BTU demand is 150,000btu/hr
Using the average btu/cu.ft of 1,100 btu we get 150,000 / 1,100 = 136 cu.ft/hr.
From International Residential Code Table T2413.4(1) for metal schedule 40 pipe and a .5 psi(8oz) supply pressure we find that a 1/2" line can supply 175cu.ft/hr to a maximum length of 10'. At 20' it drops to 120cu.ft/hr which is below the demand.
A 3/4" line could supply 138cu.ft/hr to a maximum of 60'.

Sleeve Gas Line in masoinry or concrete
Gas lines into or through a masonry fireplace wall or hearth or throudh a concrete slab must be sleaved, preferably in Schedule 40 steel pipe, so that the pipe can be replaced. Pipe joints and fittings may not be inaccessible within the concrete or masonry. See Section G2415 (404) of the IRC.

Combination or Alternative Wood/Gas Set Up
Some of our customers have asked about burning wood or gas in their Rumford depending on how they feel or the time of day. They may really prefer a wood fire but sometimes, they say, they come home late and only want a fire for about half an hour and don't feel like building a wood fire.
It takes about an hour to install or un-install a gas log set and wouldn't be something you'd want to do twice a week. How about just putting the ceramic logs in the fireplace and turning on the log lighter? It probably wouldn't look very satisfying is the answer. The gas log sets have a carefully arranged four level burner system and fake ashes to make the fire look very realistic.
So here's an idea one of our customers had: He had run the gas line as we recommend above, stubbed out in the center of the firebox about 2" forward of the fireback capped by a pipe cap with two 1/8" holes drilled in it for gas starter. Now he added an 8" section of 1/2" gas pipe with several more holes drilled in the pipe under the cap to augment and raise the height of the flame - perfect for an impressive fire inside the ceramic logs placed on end around the gas pipe burner.