Mason Lite Combustion Air Kit, 4", for MFPST43 & Linear Units | MFPST-AK-M Spa Chemicals It restores the top enclosure

It restores the top enclosure and helps keep rain

whether you're roasting marshmallows or keeping warm on chilly nights

It's often integrated into skimmer assemblies to handle pressure variations

5/8" Diameter

even heat suitable for grilling

Mason Lite Combustion Air Kit, 4", for MFPST43 & Linear Units | MFPST-AK-M Spa Chemicals It restores the top enclosureMason Lite MFPST AK M 4 Inch Combustion Air Kit For MFPST43 and Linear Units The Mason Lite MFPST AK M is a 4 inch combustion air kit for MFPST43 and linear Mason Lite units. The kit includes a closable firebox inlet, 3 feet of flexible vent conduit, and a plastic outdoor hood. The firebox inlet fits the pre cut hole in the firebox. If firebrick panels are being used, a hole must be cut to accommodate the air kit. 4 inch combustion air kit For MFPST43