Restrictor disk placement in direct vent piping for gas fireplace
Where do I place the Restrictor Disk placement in direct vent piping for gas fireplace.
My vent pipe goes vertical, 20 feet, takes a bent of another 3 feet and shoots out to the roof which is another 4 feet.
Should I put the restrictor plate/ disk close to the fireplace or on top of vent pipe clsoe to the roof?
And should i use the RTV ( high temp sealant) to glue this to the vent to prevent this from making noise?