I'm looking for a type MR4J thermopilot control valve as made by
ITT has since sold off that division and the new owner no longer makes
that product line.
I was able a few years ago to buy one off of my friendly neighborhood
gas company serviceman's truck. However, the local gas company and
HVAC repairers are now long out of stock.
I use this in a Magee gas space heater in a small cottage.
I checked with REPCO out of TX. They don't have one but MAY be able to
rebuild mine. I'd still like to find a N.O.S. spare...
or just find one with similar specifications and size:
or hd supply search catalog for "gas valve"
Honeywell 'Product Cross Reference' for an ITT/General says that a
functional replacement for:
MR4 is either C513B1018 or C581B1002 or C580B1012
MR4B is C580B1012
MR4FG is either C5133B or C5434B
My book doesn't list the MR4J, so you should to call Honeywell and/or check
the specs before installing one of these.
Thanks, I'll check the Honeywell cross lists but in a past examination
none of the above will work.
The MR4J is unique because it has a separate 3/16" gas input line
dedicated to feed the pilot.
This is necessary in my application since an upstream thermostat shuts
down the main gas feed to the MR4J, making a separate source for the
However, in case I've misread the specs on the Honeywell substitutes,
I'll check again.
Another solution would be to rework the system and use a non-safety
pilot, i.e. a pilot that doesn't shut down with flame out.
In reality, that's not particularly dangerous. There's very little gas
flow. However, it's certainly not ideal.
I've got four older Bryant gas furnaces in my rental apartments that
do exactly that...
BTW, in case some of you folks want to give me flames about "not
getting a professional involved", I tried to do that. None of them
have any familiarity with this older equipment and have refused to
My local gas company would, but they can't get parts and are not
willing to make substitutions.
I've served HVAC equipment for over 30 years and have yet to blow
myself or anyone else up.
I am in New Hampshire and there is a store that sells parts for gas and
gas stoves. They sell Glenwood , Magee , Bengal and some others. Most of
these parts are no longer available through the manufacturer. So it is
amazing that they still have all these parts. I was in the store the other
day and they had mr4 valves. They have a web site
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