50 Years of Quality, Reliability & Service

Sign In

Need Help? Call 215-785-2558

Need Help? Call 215-785-2558

Expand Navigation

Shop By Category
Building Supplies

Concrete, Cement, Masonry, Block

Lumber

Sheetrock

Stone
Cements, Adhesives, & Sealants

Adhesives

High Temp Chamber Glue

Multi Purpose Adhesives

View All

Sealants

A/C Sealant & Protector

Cements - High Temperature

Duct Sealants

Epoxy Sealants

Gasket Maker & A/C Gaskets

Heat Shrink Pipe Sealants

Insulating Sealants

Multi Purpose Sealants

Pipe Thread Sealants

Silicone & Caulks

View All
Chemicals, Cleaners, Spillpacks

Chemicals

A/C & Boiler Leak Seal, A/C Performance Chemicals & Drain Opener

A/C Flushing Solvent

Acid Test Kits

Anti-Freeze

Grease & Lubricants

Indoor Air Quality Chemicals

Leak Detectors

Marine Gas Additives

Oil

Oil Tanks & Oil Line Chemicals

Pipe Insulating Sprays

Pipe Repair

Smoke Bombs

Soot Cleaners

Wasp & Hornet Sprays & Insect Repellents

Water Absorbers

Water Detector & Eliminator

View All

Cleaners

A/C Coil Cleaner & Condenser Cleaners

Adhesive Removers

Boiler Cleaners

Degreasers

Electrical Cleaners

Grit Cloth

Hand Cleaners & Hand Wipes

Mini-Split Cleaners

Rags

Steel Wool

View All

Spillpacks
Cleaning Supplies

Booties/Shoe Covers

Buckets

Brushes & Handles

Drops & Absorbent Pads

Shovels

Sprayers

Trash Bags

Vaccuums & Accessories

Vacuums

Vacuum Accessories

Vacuum Bags

View All
Electrical

Anti Shorts

Batteries

Circuit Breakers & Fuses

Conduit & Fittings

Cords & Plug Adapters

Disconnects

Electrical Boxes & Covers

Electrical fasteners

Electrical Outlets & Receptacles

Electrical Wires & Cables

Grounding Fittings

Knockout & Plugs

Light Bulbs

Light Sockets & Adapters

Roof Heat Cables & Controllers

Solderless Terminals

Switches

Transformers & Accessories

Buss Bars

Ignition Terminals

Transformers & Plates

View All

Wire Connectors & Wire Fittings
Tapes

Cork Tapes

Duct Sealant Tapes

Duct Tapes

Electrical Tapes

Fiberglass Tapes

Foam Tapes

Foil Tapes

Misc. Tapes

Pipe Sealant Tapes

PVC Tapes

Smoke Pipe Tapes

Teflon Tapes
Hardware

Anchors

Long Anchors

Metal Anchors

Plastic Anchors

Self Drill Anchors

Short Anchors

Toggle Screw Anchors

View All

Bolts

Carriage Bolts

Draw Bolts

Eye Bolts

Hanger Bolts

Toggle Bolts

View All

Nuts

Coupling Nuts

Hex Nuts

Lock Nuts

Nylon Insert Nuts

Pan Head Nuts

Stop Nuts

Wing Nuts

View All

Screws

Bit-Tip Screws

Concrete Screws

Deck Screws

Dowel Screws

Drywall Screws

Electric Switch Plate Screws

Hex Head Screws

Knurled Head Screws

Lag Screws

Machine Screws

Screws - Eye Screws

Screws - Hook Screws

Socket Head Cap Screws

Tap Screws

Wood Screws

Zip-In Screws

View All

Strapping, Clamps & Support Materials

Rivets

Washers

Fender Washers

Finish Washers

Flat Washers

Lock Washers

View All
Hearth/Fireplace

Fireplaces

Fireplace Accessories

Fireplace Venting
Heating & Cooling

Air Conditioners, Fans, & Security Cages

A/C Package Units

A-Coils - Air Conditioning

Air Conditioning Accessories

Air Conditioning Security Cages

Air Handlers

Attic Fans & Accessories

Condensers

Ductless Air Conditioners

H-Coils - Air Conditioning

Heat Pumps

M-Coils - Air Conditioning

Modular Blowers A/C

Window Air Conditioners

View All

Air Eliminators & Dirt Separators

Air Filters & Accessories

Air Filters - Disposable

Air Filters - Electrostatic

View All

Air Purifiers & Accessories

UV Air Purifiers & Parts

Electronic Air Cleaners

Electronic Air Cleaner Parts

View All

Baseboard & Accessories

Baseboard & Accessories - Argo

Baseboard & Accessories - Cast Iron

Baseboard & Accessories - Slant Fin

View All

Boilers

Electric Boilers

Natural Gas & Propane Boiler Accessories

Natural Gas & Propane Boilers

Oil Boiler Accessories

Oil Boilers

View All

Burners & Accessories

*NOT USED*

Assorted Burner Parts

Blower Wheels

Bulkhead Locknuts & Fittings

Burner Covers

Cad Cells

Coils

Control Boxes

Conversion Kits

Couplers

End Cones, Combustion Head Assembly & Air Bands

Flanges, Gaskets & Pedestals

Gas Burners

Head Bars

Ignitors, Electrodes & Porcelains

Instant & Delayed Oil Valves

Make-Up Air Kits & Draft Regulators

Motors

Nozzle Adapters

Oil Cycle Dampers

Oil Burners

Oil Lines

Static Plates

Thermo Pride Burners & Parts

Tube & Assemblies

Tune Up Kits

View All

Chambers & Refractory

Burner Head Protectors

Chambers

Chamber Blankets

Fire Bricks

Firestop Caulks & Silicones

Kaowool & Kaowool Boards

Levittown Chamber Accessories

Lintels

View All

Chimney Liners, Pipes & Accessories

All-Fuel Oil, Wood & Pellet Chimney

Aluminum Gas Chimney

B-Vent Gas Chimney

Chimney Caps & Accessories

Stainless Steel Chimney

Z-Vent Gas Chimney

View All

*NOT USED*

Domestic Hot Water Coils

Coil Accessories

Coils

View All

Expansion Tanks

Flexible Duct & Insulated Sleeves

Flex Duct - Mobile Home

Flex Duct - Uninsulated

Flex Duct & Insulated Sleeves R-4.2

Flex Duct & Insulated Sleeves R-6

Flex Duct & Insulated Sleeves R-8

View All

Furnaces & Accessories

Condo Packs - Gas Furnace & Air Conditioner

Electric Furnaces

Mobile Home Accessories

Mobile Home Furnaces

Natural Gas Furnaces

Natural Gas Furnace Accessories

Oil Furnaces

Oil Furnace Accessories

Propane Furnaces

View All

Humidifiers & Dehumidifiers

Couplings, Adapters, Plugs & Fittings

Drum Assembly

Floats, Valves & Orifices

Hoses, Nozzles & Tubing

Humidifier Pads

Humidistats

Miscellaneous Accessories

Motors & Pumps

Relays & Transformers

Remote Kits

Scale Controls

Solenoids - Humidifier

Water Pans & Trays

View All

HVAC Duct & Fittings

Air Boosters

Canvas Connectors

*NOT USED*

Ceiling Boxes

Cold Air Boots

Collars

Dampers

Diffuser Boxes

Draft Hoods

Draw Bands

Dryer Vent Hoods & Accessories

*NOT USED*

Duct Insulation

Ductboard Collars

Eave Vents

Elbows - Metal

Elbows 45 Degree - Metal

End Caps

Fiberglass Ductboard

Filter Frames & Filter Racks

Flexible Aluminum Ducts

Floor Register Boxes

Fresh Air Hoods

*NOT USED*

Panning

Plenums

Reducers - Metal

Register Boots

Return Air Packages

Return Air Pans

Return Air Support Boxes

Reverse Boots

Roof Caps - Aluminum

Round & Oval Pipe - Metal

S-Cleat - Duct & Basset

Stackboots

Stackheads

Straight Boots

Takeoffs

Tees, Tee Caps or Wyes - Metal

Transitions

Trunk Duct

Trunk Reducers

Wall Stack

Wall Vents

View All

Hydronic Duct Coils

Oil Nozzles & Accessories

Nozzle Accessories

Danfoss Nozzles

Delavan Nozzles

Hago Nozzles

Monarch Nozzles

Steinen Nozzles

View All

Oil Pumps & Accessories

Bleeders & Bleeder Kits

Bypass Plug

Cover Gasket

Oil Pumps

O-Ring & Strainer

Pressure Switch & Pump Shaft

Seal Bellows/Assembly & Valve Bellows

Solenoids & Timers - Oil Pumps

Test Gauge Adaptor

Vacuum & Pressure Test Kits

View All

Oil Storage Tanks

Oil Storage Tank Accessories

*NOT USED*

Bushings

Caps & Fills

Combogauges

Extension Kits & Leak Detectors

Fuel Level Monitors

Oil Filters & Refills

Oil Tank Covers & Pans

Roth German Tank Adapters

Roth Install kits

Roth Tie Down Kits

Snorkels

Suction Assembly

Tank Gauges

Tank Repairs

Tank Warmers

Ventalarms

Vials

View All

Portable & Space Heaters

Kickspace & Portable Heaters

Kickspace Heater Parts & Accessories

View All

Power Venters & Draft Inducers

Controls & Parts for Power Venters & Draft Inducers

Draft Inducers

Power Venters

View All

Rebuilt Bearing Assemblies, Controls, Motors & Pumps

Rebuilt Bearing Assemblies

Rebuilt Controls

Rebuilt Motors

Rebuilt Pumps

View All

Registers, Grills & Accessories

Baseboard Registers

Baseboard Returns

Dampers

Diffusers

Drop Ceiling & Rough In Flanges

Eggcrate Panels

Exhaust Grills

Filter Grills

Floor Grills

Floor Registers

Register & Return Air Frames

Return Air Grills

Supply Registers

Toe Space Grills

View All

Sheet Metal

Thermometers & Gauges

Boiler Gauges

Compound Gauges

Gauge Glass & Accessories

Leak Test Gauges

Pressure Gauges

Steam Gauges

Thermometers

Vacuum Gauges

Water Gauges

View All

Thermostats, Controls, Relays

Aquastats, Wells & Accessories

Cad Cell Kits & Eyes

Circuit Boards

Contactors

Cutoff Switches

Damper Actuators & Damper Linkages

Defrost Controls

Electric Heat Sequencers

Fan & Limit Controls

Fan Centers

Flame Sensors

Flow Switches

Hot Surface Ignitors

Humidistats & Dehumidistats

*NOT USED*

Integrated Furnace Controls

*NOT USED*

Low Water Cut Offs & Accessories

*NOT USED*

Outdoor Reset

Pilot Controls & Pilot Burners

Pressure Switches

Pressuretrols

Primary Controls & Accessories

*NOT USED*

Relays & Mounting Plates

Relays - Klixon

Relay Fuses

Retrofit Electronic Ignition System

*NOT USED*

Temperature Controls

Thermistors & Thermistor Sensors

Thermopiles

Thermostats

Thermostat Accessories - Adapter Plates & Wall Plates

Thermostat Accessories - Cover Plates

Thermostat Accessories - Lock Boxes

Thermostat Accessories - Redlink & Wifi

Thermostat Accessories - Subbases

Timers

Water Leak Detectors & Freeze Alarms

*NOT USED*

*NOT USED*

Zone Valves & Zone Valve Accessories

View All

Vent Dampers

Gas Vent Dampers

Oil Vent Dampers

Parts & Accessories for Vent Dampers

View All

Wall Hung Heaters
Motors & Accessories

Blower Motors - Belt Drive

Blower Motors - Direct Drive

Burner Motors

*NOT USED*

Condenser Fan Motors

Motor Accessories

Bearing Sets

Belts

Blower Wheels

Capacitors

Motor Mounting Hardware

Pulleys

Shafts, Sleeves, Spacers, Collars

View All

Vacuum Motors
Paint

Oil Tank Touch-Up Paint

Slant Fin Touch-Up Paint

Spray Paint
Plumbing

Circulators & Water Pumps

Bearing Assembly

Body Gaskets

Cartridge Assembly

Circulators

Circulator Motors

Condensate Pumps

Couplers

Coupler Flanges & Sleeves

Dyna Discs

Flange Gaskets

Flanges

Impellers

Motor Mounts

Pump Plates

Repair Kits - Circulators

Replacement Parts & Accessories

Seal Kits

View All

Copper Fittings

Copper Adapter

Copper Adapter - Press

Copper Adapter - Push

Copper Bushing

Copper Cap

Copper Cap - Press

Copper Cap - Push

Copper Coupler

Copper Coupler - Press

Copper Coupler - Push

Copper Elbow

Copper Elbow - Press

Copper Elbow - Push

Copper Expansion Coupler

Copper Plug

Copper Reducer

Copper Reducer - Press

Copper Tee

Copper Tee - Press

Copper Tee - Push

Copper Union

Copper Union - Press

View All

Galvanized

Galvanized Bushing

Galvanized Cap

Galvanized Coupler

Galvanized Elbow

Galvanized Fitting & Nipples

Galvanized Floor Flange

Galvanized Nipples

Galvanized Pipe

Galvanized Plug

Galvanized Tee

Galvanized Union

View All

PEX

Grommets

Hot Water Heater Connectors

Manifolds & Fittings

PEX Adapters

PEX Ball Valves

PEX Clamps

PEX Couplers

PEX Elbows

PEX Faucet Connectors

PEX Pipe

PEX Plugs

PEX Tees

PEX Tools

PEX Tubing Connectors

PEX Tubing Fasteners

Stud Brackets

View All

Pipe Insulation

Pipe, Tubing, Fittings & Accessories

Black Bushing

Black Cap

Black Coupler

Black Cross

Black Elbow

Black Floor Flange

Black Iron Fittings & Nipples

Black Iron Pipe

Black Nipples

Black Plug

Black Tee

Black Union

Black Wye

Black Zone Header

Brass Adapter - Compression

Brass Adapter - Flare

Brass Adapter - Hose

Brass Bushing

Brass Cap

Brass Coupler

Brass Elbow

Brass Elbow - Compression

Brass Elbow - Flare

Brass Ferril

Brass Garden Hose Cap & Washer

Brass Inverted Flares

Brass Nipple

Brass Nut

Brass Nut - Compression

Brass Nut - Flare

Brass Plug

Brass Plug - Flare

Brass Tank Fitting

Brass Tee

Brass Tee - Compression

Brass Tee - Flare

Brass Union

Brass Union - Compression

Brass Union - Flare

Cast Iron Pipe & Fittings

Copper Pipe

Copper Pipe - Coated

Copper Pipe - Hard Pipe

Copper Pipe - Soft Pipe

CPVC Pipe & Fittings

Flexible Gas Line & Accessories

Nylon Fittings

View All

*NOT USED*

Pipe Heat Cable & Controllers

*NOT USED*

Plastic Coil Pipe & Fittings

Plumbing Accessories

Polyethylene Pipe & Fittings

Pressure Tanks

*NOT USED*

PVC, DWV Fittings

*NOT USED*

DWV Adapter

DWV Coupler

DWV Elbow

DWV Pipe & Fittings

DWV Tee

PVC, DWV Trap

PVC Adapter

PVC Bushing

PVC Cap

PVC Concentric Vent Kit

PVC Coupler

PVC Drain Pan Fitting

PVC Elbow

PVC Fittings

PVC Pipe

PVC Plug

PVC Primer & Cement

PVC Roof Flashing

PVC Tee

PVC Union

View All

*NOT USED*

*NOT USED*

Tubing & Hoses

Valves & Valve Repair

Air Scoops

Antiscald Valves & Accessories

Backflow Preventers & Backflow Feeder Combos

Ball Valves

Bleeder Valves

Blowoffs

Boiler Drains

Bullet Piercing Valves

Check Valves

Dual Units

*NOT USED*

Feed Valves & Parts

Flow Valves

Fusible Valves

Gas Valves & Controls

Gate Valves

Hose Bibs

Mixing Valves & Parts

*NOT USED*

Oil Safety Valves & Tool

Purge Valve & Balance Valve

Radiator Valve & Accessories

Relief Valve

Restrictor Valve

Saddle Valve & Line Tap Valve

*NOT USED*

Shut-Off Flange

Shut-Off Valve & Inline Valve

Solenoid Valve

Steam Valve

Stop & Waste

T&P Valve

Tank Valves

Tempering Valves & Accessories

Thermostatic Bypass Valves & Accessories

*NOT USED*

*NOT USED*

View All

Water Filtration & Water Softeners

Accessories - Water Filtration & Softeners

Filters - Water Filtration & Softeners

View All

Water Heaters & Accessories

Electric Heat Pump Water Heater

Electric Water Heaters

Hybrid Water Heater

Indirect Water Heaters & Storage Tanks

Natural Gas Water Heaters

Oil Water Heater

Oil Water Heater Accessories

Propane Water Heater

Tankless Electric Water Heaters

Tankless Gas Water Heaters

Water Heater Accessories

Water Heater Parts

View All

Water Pumps & Tanks
Safety

Flashlights, Worklights & Accessories

Ice Melt

Jobsite Safety

Gloves

Safety Equipment

Safety Glasses

View All

Safety Accessories

Smoke, Carbon MonoxIde Detectors & Accessories
Security Systems, Cameras, Doorbells - Google
Tools

Electrical Testers, Combustion Testers & Tools

Hand Tools

Blowout Guns & Accessories

Caulking Guns

Cutting, Bending, Crimping & Flaring Tools

Drill Bits

Push Fitting Tools

Force & Suction Pumps

Hammers

Hand Saws & Blades

Manifolds & Air Conditioning & Heat Pump Tools

Nut Drivers & Keys

Pliers & Plier Sets

Ratchets

Screwdrivers & Screwdriver Sets

Sockets & Socket Sets

Staple Guns & Staples

Tool Sets

Wrenches & Wrench Sets

View All

Toolboxes & Totes

Levels & Measuring Tools

Power Tools & Accessories

Welding, Soldering & Gas

Acetylene, Oxygen, Nitrogen, Mapp & Propane

Adapters - Welding & Soldering

Flux & Paste

Hose

Propane Handtorch

Regulator & Gauge

Replacement Parts

Solder & Brazing Rods

Tanks & Gas

Torch Kits

Torch Tips, Heat Shields & Torch Handles

Welding & Soldering Accessories

View All
*NOT USED*
About Us
Contact Us

Navigation loading...

Building Supplies
Cements, Adhesives, & Sealants
- Adhesives
  - High Temp Chamber Glue
  - Multi Purpose Adhesives
- Sealants
Chemicals, Cleaners, Spillpacks
Cleaning Supplies
Electrical
Tapes
Hardware
Hearth/Fireplace
Heating & Cooling
Motors & Accessories
Paint
Plumbing
Safety
Security Systems, Cameras, Doorbells - Google
Tools
*NOT USED*

Flex Duct & Insulated Sleeves R-4.2

There are no products to display.

Heating & Cooling>Flexible Duct & Insulated Sleeves>Flex Duct & Insulated Sleeves R-4.2

Account Login

Submit

Newsletter Signup

Please wait...

Home
About Us
Contact Us
My Account
Help

Friend Us On Facebook

Inform e-Commerce - Developed by DDI System LLC