Founded in 1968, PolyFab provides custom engineered plastic fabrications.
We work with many materials and specialize in clear plastics.
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CPVC Duct
The bottom of the lower combustion air opening shall be located at or below the floor of the room containing LPG-fueled equipment.
(b) The lower combustion air duct, when used, shall have the bottom installed level or with a downward slope, starting from a point at or below the equipment room floor and continuing to the outside of the structure. The duct shall terminate above the finish grade, and shall be provided with wire mesh screen to cover the opening.
Solvent Cement Plastic Pipe Joints. Plastic pipe and fittings designed to be joined by solvent cementing shall comply with appropriate IAPMO Installation Standards.
ABS pipe and fittings shall be cleaned and then joined with listed solvent cement(s).
CPVC pipe and fittings shall be cleaned and joined with listed primer(s) and solvent cement(s).
Exception: Listed solvent cements that do not require the use of a primer shall be permitted for use with CPVC pipe and fittings 1/2" through 2" in diameter, manufactured in accordance with ASTM D 2846/D 2846M-99, which is incorporated by reference and published by American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. This incorporation by reference does not include any later amendments or editions.
Credit: CPVC Duct
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