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Product of the Day
€3.90
€3.17
€0.29
€0.24
€87.99
€71.54
€1.28
€1.04
Coupling 3" Galvanized Malleable Iron
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Regular price:
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Description
Coupling 3" Galvanized Malleable Iron
- Size: 3" (thread diameter: 84.9–85.3 mm)
- Female threads
- Material: Malleable iron
- Finish: Hot-dip galvanized
- Other designation: 2 270 M2
- Applications: Water supply systems, domestic installations, industrial systems, central heating, hydraulic installations

Alternative Name
Coupling 3" Galvanized Malleable Iron, Galvanized Female Thread Coupling, Cast Iron Coupling, BSP Female Coupling, Water Pipe Coupling, Galvanized Threaded Coupling
Information
The 3" galvanized coupling is manufactured from malleable iron and is designed for joining threaded pipe systems used in water, heating, and industrial installations. It features female threads on both ends, providing a durable and reliable threaded connection.
Galvanized malleable iron fittings are widely used throughout industry thanks to their durability, cost-effectiveness, and excellent availability. They are ideal for installations with moderate operating requirements, including cold and hot water systems.
Material
The coupling is manufactured from malleable iron and protected with a hot-dip galvanized coating, providing excellent resistance to corrosion and atmospheric conditions.
Technical Specifications
- Maximum working pressure: 25 bar at operating temperatures from -20°C to +120°C
- Maximum working pressure: 20–25 bar at operating temperatures from -20°C to +300°C
- Manufactured according to EN 10242
The fitting features:
- External tapered threads: R
- Internal parallel threads: Rp
Both thread types comply with ISO 7-1.
Advantages
- Hot-dip galvanized finish
- Excellent corrosion resistance
- Female threaded connection
- Durable malleable iron construction
- Cost-effective solution
- Manufactured according to EN 10242
Applications
Suitable for:
- Water supply installations
- Domestic plumbing systems
- Industrial piping systems
- Central heating installations
- Hydraulic systems
- Cold and hot water installations
Available Sizes
- 1/8"
- 1/4"
- 3/8"
- 1/2"
- 3/4"
- 1"
- 1 1/4"
- 1 1/2"
- 2"
- 2 1/2"
- 3"
- 4"
Product Range
The galvanized malleable iron fittings range includes:
- Elbows
- Reducing elbows
- Tees
- Reducing tees
- Reducers
- Short bends
- Long bends
- Couplings
- Reducing couplings
- Caps
- Plugs with flange
- Plugs without flange
- T9 plugs
- Unions with female threads
- Male unions
- Gasket unions
- Conical unions
- Straight nipples
- Reducing nipples
We also offer black malleable iron fittings without galvanized coating.
We also offer a wide range of malleable iron fittings. If you have any questions, please contact us. Call +48 63 261 42 02 or email biuro@polberis.pl.
Learn more about our threaded couplings here >>
Technical data
| Coupling Type | Coupling |
| Material | Cast Iron |
| Pressure | Pressure Range < 20 bar |
| Connection 1 | 3'' |
| Thread Type – Connection 1 | BSP / G / Rp / Rc Thread |
| Connection 2 | 3'' |
| Thread Type – Connection 2 | BSP / G / Rp / Rc Thread |
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Cast iron tee 1/4''
Cast iron tee 3/8''
Cast iron tee 1/2''
Cast iron tee 3/4''
Cast iron tee 1''
Cast iron tee 1 1/4''
Cast iron tee 2''
Cast iron tee 2 1/2''
cast iron corner tee 1/2''
cast iron corner tee 3/4''
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- łącznik do spawania rur
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cast iron corner tee 1''
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- żeliwo ocynkowane
Extension 3/4''x3/8'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 3/4''x1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1''x1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1''x3/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/4''x1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/4''x3/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/4''x 1'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/2''x3/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/2''x1'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/2''x1 1/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 2''x1'' galvanized cast iron
- żeliwo ocynkowane
Extension 2''x1 1/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 2''x1 1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 2 1/2''x2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 3/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 2" galvanized cast iron reduction
- żeliwo ocynkowane
Angle union 3/8'' galvanized cast iron F-M
- galvanized cast iron
Angle union 1/2'' galvanized cast iron F-M
- żeliwo ocynkowane
Angle union 3/4'' galvanized cast iron F-M
- żeliwo ocynkowane
Angle union 1'' galvanized cast iron F-M
- żeliwo ocynkowane
Angle union 1 1/2'' galvanized cast iron F-M
- żeliwo ocynkowane
Angle union 2'' galvanized cast iron F-M
- żeliwo ocynkowane
Angle union 2 1/2'' galvanized cast iron
- żeliwo ocynkowane
Angle union 3'' galvanized cast iron F-M
- żeliwo ocynkowane
Angle union 1/2'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 3/8'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 3/4'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 1'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 1 1/4'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 1 1/2'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 2'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 2 1/2'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 3'' galvanized cast iron F-F
- żeliwo ocynkowane
Short bend 1/2'' cast iron 90deg
- inna nazwa: nr 2a
- numer PN / ISO: D1
Coupling 1''-1/2'' socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Coupling 1" socket weld 316L cl.3000
- mufa do spawania
- atest 3.1
- pochodzenie: Unia Europejska
Coupling 3/4''-1 1/2'' socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Coupling 1'' - 1/2'' socket weld A350 LF2 cl.3000
Coupling 1''-3/4'' socket welt A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Coupling 1 1/4" socket weld 316L cl.3000
- coupling for welding
- atest 3.1
- origin: European Union
Reduction coupling 3/4" - 1'' socket weld 316L cl. 3000
Coupling 1''x1 1/4'' socket weld 316L cl. 3000
Coupling 3/8''-3/4'' socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Coupling 3/8''-1/2'' socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Stainless reduction connector 1/2'' - 1/4'' 304
Coupling 1'' BSP A350 LF2 cl.3000
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 1/2'' BSP A350 LF2 cl.3000
Coupling 3/4'' BSP A350 LF2 cl.3000
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 1/4'' BSP A350 LF2 cl.3000
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 1/4'' x 1/8'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3/8'' x 1/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1/2'' x 1/8'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1/2'' x 1/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1/2'' x 3/8'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3/4'' x 1/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3/4'' x 3/8'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3/4'' x 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1'' x 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1'' x 3/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/4'' x 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/4'' x 3/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/4'' x 1'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/2'' x 3/4'' stainless steel 316 BSP
- stal nierdzewna gat. 316
Coupling 1 1/2'' x 1'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/2'' x 1 1/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 2'' x 1'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 2'' x 1 1/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 2'' x 1 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 2 1/2'' x 2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 2 1/2'' x 1 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3'' x 2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3'' x 2 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 4'' x 3'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1/4'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Coupling 2 1/2'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 1 1/4'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Reduction coupling 1 1/4" x 1 1/2'' NPT 3000 A105
Coupling 1 1/2'' BSP 316L cl.3000 206bar
- high-pressure coupling
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Coupling 1 1/4'' BSP 316L cl.3000 206bar
- high-pressure coupling
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Coupling 1 1/4'' BSP 206bar 304L
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 1" NPT Class 6000 (413 bar) Stainless Steel 316L (1.4404)
- pressure class: 6,000 lbs (i.e., 413 bar)
- 3.1 certification
- origin: European Union
Reducing coupling 3/4''- 1'' BSP steel
- steel coupling
Coupling 3/8" BSPT Class 3000 ASTM A105
- boiler steel for welding
- BSPT tapered thread (per ISO 7Rc)
- for high pressure up to 206 bar
- 3.1 certificate
Steel reduction coupling 1/4''x1/2'' NPT
Reduction 2 1/2''x1 1/2'' galvanized cast iron screw-on
Union 1/4'' galvanized cast iron F-F
Coupling 1/4'' x 1'' NPT 316L cl.3000
- High-Pressure coupling
- Certificate 3.1
Coupling 1/2'' x 1'' NPT 316L cl.3000
- High-Pressure coupling
- Certificate 3.1
Coupling 1/2'' x 1'' BSP cl.3000 A105 steel
- gwint standardowy polski BSP (inna nazwa G, Rp, walcowy prosty)
- atest 3.1
- pochodzenie: Unia Europejska
Coupling 2''- 3'' socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Coupling 1 1/4'' steel for welding
Coupling 2 1/2'' 316L NPT cl.3000
- certificate 3.1
- orgin: European Union
Reduction coupling 1/2'' x 3/4'' NPT cl.3000 A105
Coupling 1/2'' BSP stainless steel 316
Reduction coupling 2'' x 1'' NPT 3000 A105
Coupling 3/4" socket weld 316L cl.3000
- mufa do spawania
- atest 3.1
- pochodzenie: Unia Europejska
Coupling 2'' steel for welding
Reducing Coupling 1/2" × 1/4" BSP Class 3000 ASTM A105
-
Polish standard thread (BSP)
Coupling 1/8'' BSP stainless steel 316
Coupling 1/4'' BSP stainless steel 316
Coupling 3/8'' BSP stainless steel 316
Coupling 3/4'' BSP stainless steel 316
Coupling 1'' BSP stainless steel 316
Coupling 1 1/4'' BSP stainless steel 316
Coupling 2'' BSP stainless steel 316
Coupling 2 1/2'' BSP stainless steel 316
Coupling 3'' BSP stainless steel 316
Coupling 4'' BSP stainless steel 316
Coupling 2'' NPT 321 cl.3000
- mufa wysokociśnieniowa (206bar)
- atest 3.1
Coupling 1'' NPT 321 cl.3000
- mufa wysokociśnieniowa (206bar)
- atest 3.1
Plug 1/4'' BSP 316L Stainless Steel
- High-pressure plug
- 3.1 material certificate available on request (free of charge)
Nipple ball valve 3''
Hex coupling M10x1 steel
- thread type: metric
- high pressure coupling
Hex coupling M24x1,5 steel
- thread type: metric
- high pressure coupling
Half coupling 1'' for welding
Nipple 3'' galvanized cast iron
SOCKOLET 3/4'' x 3''-5'' SW A105 kl.3000 OUTLET
SOCKOLET 1'' x 3''-3 1/2'' SW A105 cl.3000 OUTLET
Cap 3'' NPT A105 3000lbs
- material: carbon steel
- certificate 3.1 at the request of the customer (free of charge
- origin: European Union
Pipe nipple 3'' NPT 100mm A106
Hex plug 3" NPT A105 cl.3000
- high-pressure plug
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Pipe 3" A106 carbon steel 45mm
Plug 3" BSP A105 cl.3000
Nipple 3'' NPT cl. 3000 A105 fitting
Tee 3/4'' BSP Class 3000 A105
- Grade: welding steel A105 (P245GH, P280GH)
- High-pressure tee
- Certificate 3.1
Elbow 3" NPT A105 90° Class 3000
Steel Pipe 3" 88.9 × 10 mm P355 100 cm
Stainless union 3'' BSP
- material: stainless steel 316
Stainless nipple 3'' 316
Weld-on pipe nipple 3'' 316L
Stainless nipple union 3" BSP
Plug 3'' BSP Stainless Steel 316
Cap 3'' stainless steel 316
- material: stainless steel 316
- certificate 3.1 at the request of the customer (free of charge)
Flange 3'' SLIP-ON 150lbs 316L B16.5
Lap joint flange 3'' 150lbs 304L B16.5
Welded elbow 88.9x3mm stainless steel 316L
- stal nierdzewna (inox)
- stal doskonała do spawania
Hamburg Elbow 3''
Sockolet SW 3/4''x 3''-5'' 304L cl. 3000
Stainless pipe nipple 3'' 120mm
Nipple 3''x2'' galvanized cast iron
- nypel żeliwny ocynkowany
Cast iron elbow 3'' 45 deg
Union 3'' galvanized cast iron F-F
Black Malleable Iron Cap 3'' T1
- Cap
- Model: T1 / No. 43 / No. 300
Short bend 3/4'' cast iron 90deg
- inna nazwa: nr 2a
- numer PN / ISO: D1
Short bend 1'' cast iron 90deg
- inna nazwa: nr 2a
- numer PN / ISO: D1
Łuk krótki 1 1/4'' żeliwo ocynk 90 stopni GW
- inna nazwa: nr 2a
- numer PN / ISO: D1
Short bend 1 1/2'' cast iron 90deg
- inna nazwa: nr 2a
- numer PN / ISO: D1
Coupling 2 1/2'' steel for welding
Coupling 2'' BSP 206bar 304L
- high pressure coupling
- certificate 3.1
- orgin: European Union
Short bend 2'' cast iron 90deg
- inna nazwa: nr 2a
- numer PN / ISO: D1
Coupling 2" socket weld A105 cl.3000
Coupling 2 1/2" BSPT Class 3000 ASTM A105
- boiler steel for welding
- BSPT tapered thread (per ISO 7Rc)
- for high pressure up to 206 bar
- 3.1 certificate

