Marstan Inc. - Galvanized and PVS HVAC Duct
PVS Products
Spiral Vinyl-Coated Pipe
Pipe Connectors
Elbows
Reducers
90° Tap, Tees
45° Lateral Tees
Boot Saddle & Shoe Tap
Register Saddle & Boot
Stack Boots, Junction Box and Plenums
Flat Sheets & Accessories
Installation

Galvanized Products
Spiral Galvanized Pipe
Pipe Connectors
Elbows
Reducers
90˚ Taps, Tees
45˚ Lateral Tees
Register Saddles
Flat Sheets, Sealant, Wall Tile, Nail Plate
Rectangular Duct & Products
Round Dampers
Warm Air Fittings
Cold Air Fittings
Access Panels
Slips, Drives, & Roof Accessories

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Low Pressure Fittings for Residential and Light Commercial HVAC Applications

Concentric
Reducers
Eccentric
Reducers
concentric reducers eccentric reducers
Part numbers shown represent the standard Large End (D2). The Small End (D1) must be specified when ordering. Example: When ordering a 8x6 Concentric Reducer, the standard part number shown below is
2-08413XX. Specifying the required D1 changes the part number to 2-0841306.
Concentric Reducers
D2 C1 C2 L Gauge Part #
6 2 2 4 26 2-06413XX
7 2 2 4 26 2-07413XX
8 2 2 4 26 2-08413XX
9 2 2 4 26 2-09413XX
10 2 2 4 26 2-10413XX
12 2 2 4 24 2-12413XX
14 2 2 4 24 2-14413XX
16 2 2 4 24 2-16413XX
18 2 2 4 22 2-18413XX
20 2 2 4 22 2-20413XX
22 2 2 4 22 2-22413XX
24 2 2 4 22 2-24413XX
XX denotes D1
Eccentric Reducers
D2 C1 C2 L Gauge Part #
6 2 2 4 26 2-063413XX
7 2 2 4 26 2-073413XX
8 2 2 4 26 2-083413XX
9 2 2 4 26 2-093413XX
10 2 2 4 26 2-103413XX
12 2 2 4 24 2-123413XX
14 2 2 4 24 2-143413XX
16 2 2 4 24 2-163413XX
18 2 2 4 22 2-183413XX
20 2 2 4 22 2-203413XX
22 2 2 4 22 2-223413XX
24 2 2 4 22 2-243413XX
XX denotes D1
Standard L is 4". When reduction difference (D2-D1) is greater than 4", subtract 2" from the reduction difference to get L dimension. Example: 12x4 Reducer = reduction difference of (12"-4") 8". Subtract 2" and L = 6". Other sizes available.
Note: 2" bead added to any fitting, no charge upon request.
PVS and Galvanized HVAC Equipment