I have a new chamber rebuild kit for a Monitor 21/22/422. This kit includes a new burn pot with new burn mat, flame ring, pot to chamber gasket, igniter gasket, igniter cover gasket and flame sensor gasket. I hope to sell this as a complete set but will consider selling parts separately for the right price. I had bought this kit a few years ago as an extra and recently found a used burn chamber that had a good pot/flame ring and I have other gaskets so I don't need to hold onto this one. I'm asking $225. shipped for the complete kit. If you're interested in buying the complete kit or individual parts send me a PM or post in this thread what you want and we'll work out the details in a PM. All parts are original Monitor service parts.