Mcdonnell & Miller FS4-3 General Purpose Liquid Flow Switch, 120/240 VAC at 50/60 Hz, 2 SPDT, 160 psi

• Universal design serves the widest variety of applications
• Replacement for common flow switches from johnson/penn, potter/taco, watts, hydrolevel and other manufacturers
• Two electrical knock-outs allows connection from either end
• Sensitivity adjusting screw makes flow adjustment easy
• Hardened stainless steel bearings minimize friction
• Sealed monel bellows
• Materials of construction suitable for corrosive liquids
• Includes: (4) 1, 2, 3 and 6" stainless steel paddles

Sid Harvey Item #:B113-10: Replaces Part #:'s : L37-332

All products are designed and manufactured for use within forced air systems, providing effective distribution of conditioned air from the air handler to every room of a residence.Metal duct and fittings are constructed from hot-dipped Galvanized steel. All metal products are made true to gauge. Sheet metal duct, pipe, and fittings are designed with industry and regional standards in mind, as well as ACCA and SMACNA recommendations and requirements. Products are hand-crafted to reduce noise and friction and constructed to maximize efficiency by increasing airflow without leaks. The quality of our Galvanized steel allows us to create fittings that are rust-resistant and durable.


Southwark 49P1830 Adjustable Side Plenum Galvanized 18" x 30"

McDonnell & Miller RB-122

Drywall Frame Galvanized 24" x 6"

McDonnell & Miller CO-12

All products are designed and manufactured for use within forced air systems, providing effective distribution of conditioned air from the air handler to every room of a residence.Metal duct and fittings are constructed from hot-dipped Gallonvanized steel. All metal products are made true to gauge. Sheet metal duct, pipe, and fittings are designed with industry and regional standards in mind, as well as ACCA and SMACNA recommendations and requirements. Products are hand-crafted to reduce noise and friction and constructed to maximize efficiency by increasing airflow without leaks. The quality of our Gallonvanized steel allows us to create fittings that are rust-resistant and durable.


Southwark 24x8-22.75x14.75 Return Air Boot 24" x 8-22.75" x 14.75"

McDonnell & Miller B103

All products are designed and manufactured for use within forced air systems, providing effective distribution of conditioned air from the air handler to every room of a residence.Metal duct and fittings are constructed from hot-dipped Galvanized steel. All metal products are made true to gauge. Sheet metal duct, pipe, and fittings are designed with industry and regional standards in mind, as well as ACCA and SMACNA recommendations and requirements. Products are hand-crafted to reduce noise and friction and constructed to maximize efficiency by increasing airflow without leaks. The quality of our Galvanized steel allows us to create fittings that are rust-resistant and durable.


Southwark 49P1836 Adjustable Side Plenum Galvanized 18" x 36"

McDonnell & Miller RB-24

All products are designed and manufactured for use within forced air systems, providing effective distribution of conditioned air from the air handler to every room of a residence.Metal duct and fittings are constructed from hot-dipped Galvanized steel. All metal products are made true to gauge. Sheet metal duct, pipe, and fittings are designed with industry and regional standards in mind, as well as ACCA and SMACNA recommendations and requirements. Products are hand-crafted to reduce noise and friction and constructed to maximize efficiency by increasing airflow without leaks. The quality of our Galvanized steel allows us to create fittings that are rust-resistant and durable.


Southwark 27R6108 Straight Stack Register Boot Galvanized 6" x 10" x 8"

McDonnell & Miller B120

All products are designed and manufactured for use within forced air systems, providing effective distribution of conditioned air from the air handler to every room of a residence.Metal duct and fittings are constructed from hot-dipped Galvanized steel. All metal products are made true to gauge. Sheet metal duct, pipe, and fittings are designed with industry and regional standards in mind, as well as ACCA and SMACNA recommendations and requirements. Products are hand-crafted to reduce noise and friction and constructed to maximize efficiency by increasing airflow without leaks. The quality of our Galvanized steel allows us to create fittings that are rust-resistant and durable.

McDonnell & Miller 153827

All products are designed and manufactured for use within forced air systems, providing effective distribution of conditioned air from the air handler to every room of a residence.Metal duct and fittings are constructed from hot-dipped Gallonvanized steel. All metal products are made true to gauge. Sheet metal duct, pipe, and fittings are designed with industry and regional standards in mind, as well as ACCA and SMACNA recommendations and requirements. Products are hand-crafted to reduce noise and friction and constructed to maximize efficiency by increasing airflow without leaks. The quality of our Gallonvanized steel allows us to create fittings that are rust-resistant and durable.


Southwark 27R4147 Straight Stack Register Boot Gallonvanized 4" x 14" x 7"

Bell & Gossett B112-6

All products are designed and manufactured for use within forced air systems, providing effective distribution of conditioned air from the air handler to every room of a residence.Metal duct and fittings are constructed from hot-dipped Galvanized steel. All metal products are made true to gauge. Sheet metal duct, pipe, and fittings are designed with industry and regional standards in mind, as well as ACCA and SMACNA recommendations and requirements. Products are hand-crafted to reduce noise and friction and constructed to maximize efficiency by increasing airflow without leaks. The quality of our Galvanized steel allows us to create fittings that are rust-resistant and durable.


Southwark 27R4148 Straight Stack Register Boot Galvanized 4" x 14" x 8"

Bell & Gossett B112-7

All products are designed and manufactured for use within forced air systems, providing effective distribution of conditioned air from the air handler to every room of a residence.Metal duct and fittings are constructed from hot-dipped Galvanized steel. All metal products are made true to gauge. Sheet metal duct, pipe, and fittings are designed with industry and regional standards in mind, as well as ACCA and SMACNA recommendations and requirements. Products are hand-crafted to reduce noise and friction and constructed to maximize efficiency by increasing airflow without leaks. The quality of our Galvanized steel allows us to create fittings that are rust-resistant and durable.


Southwark 27R6105 Straight Stack Register Boot Galvanized 6" x 14" x 5"

McDonnell & Miller B112-8

All products are designed and manufactured for use within forced air systems, providing effective distribution of conditioned air from the air handler to every room of a residence.Metal duct and fittings are constructed from hot-dipped Galvanized steel. All metal products are made true to gauge. Sheet metal duct, pipe, and fittings are designed with industry and regional standards in mind, as well as ACCA and SMACNA recommendations and requirements. Products are hand-crafted to reduce noise and friction and constructed to maximize efficiency by increasing airflow without leaks. The quality of our Galvanized steel allows us to create fittings that are rust-resistant and durable.


Southwark 27R6127 Straight Stack Register Boot Galvanized 6" x 12" x 7"

McDonnell & Miller B122

All products are designed and manufactured for use within forced air systems, providing effective distribution of conditioned air from the air handler to every room of a residence.Metal duct and fittings are constructed from hot-dipped Galvanized steel. All metal products are made true to gauge. Sheet metal duct, pipe, and fittings are designed with industry and regional standards in mind, as well as ACCA and SMACNA recommendations and requirements. Products are hand-crafted to reduce noise and friction and constructed to maximize efficiency by increasing airflow without leaks. The quality of our Galvanized steel allows us to create fittings that are rust-resistant and durable.


Southwark 243127 Wallstack Register Boot 90 Degree Galvanized 3-1/4" x 12" x 7"

McDonnell & Miller 153927