


This Reduced Female/Female (F/F) sleeve is a robust brass fitting, essential for achieving a diameter reduction between two male threads. Manufactured by forging or bar turning, it offers a solidity to withstand a Nominal Pressure of 16 Bar. Its connection uses the ISO 228-1 (BSPP) Gas "G" standard, ensuring maximum compatibility. The sleeve is available in a wide range of sizes, from 1/4'' to 2'', to meet all general plumbing reduction needs. Its operating temperature can be adjusted according to the type of sealant chosen (PTFE, elastomer seal, etc.). It is the ideal and compact solution for professionals looking for a reliable junction when transitioning from a large diameter to a smaller one.
Managing the complexity of plumbing networks requires precise and reliable connections. The Brass Reduced Sleeve Female/Female is the key piece when you need to interconnect two male threads of different diameters, while ensuring a perfect seal. It is the ideal solution for quickly reducing the size of a line or for adapting equipment (a pump or valve) to a smaller pipe. As experts, we prefer this type of fitting, manufactured with rigour to offer maximum robustness, an essential guarantee for general plumbing and building professionals.
This reduced sleeve is designed for durability and efficiency under stress. It is made from high quality brass (whether by forging and machining or bar turning), ensuring a precise finish of the threads and superior mechanical strength. Its solidity allows it to withstand a Nominal Pressure (PN) of 16 Bar, covering the needs of the majority of cold water, hot water and heating installations. Its robustness distinguishes it from sleeves made of less resistant materials, offering increased safety against pressure variations and mechanical shocks.
One of the main advantages of this sleeve is its universal compatibility, which is essential for easy integration into any existing network.
Thread Standard: The fitting uses the standard ISO 228-1 Gas "G" thread (BSPP). This parallel thread is widely used in plumbing, allowing for simple and efficient assembly with male threads of the same standard.
Dimensional versatility: The F/F Reduced Sleeve is available in a wide range of reductions, offering sizes ranging from 1/4'' to 2''. This diversity makes it possible to meet virtually any diameter reduction configuration encountered on construction sites.
Example: Reduce a line from 1'' to 1/2'' for feeding equipment or from 3/4'' to 1/4'' for mounting a trap.
Unlike other types of fittings, the F/F reduced sleeve is a passive component whose performance is directly related to the sealants chosen by the professional.
Thermal Adaptability: The maximum operating temperature depends entirely on the type of sealing applied by the installer: PTFE tape (polytetrafluoroethylene, the most common), elastomeric seal, fiber seal (for high-temperature applications), or glue/joint paste for threads. This flexibility ensures that the sleeve can be used in a variety of conditions, from cold water circuits to hot plumbing.
Sealing method: BSPP threading requires the addition of a sealant directly to the incoming male thread to prevent leakage.
The Female/Female Reduced Sleeve is the must-have tool for professionals looking to maintain a clean and compact line during a gauge reduction.
Examples of use:
Line Reduction: Switch from the main piping (large diameter) to a branch or branch line (small diameter).
Meter Connection: Adapt the inlet or outlet of a water meter or filter, with male threads, to the upstream or downstream piping.
Pump Mounting: Connect a pump with a male outlet to a suction line of smaller diameter.
Maintenance: Simplify the replacement of an old fitting by ensuring a clean transition between two male threaded equipment.
| Characteristics | Specifications |
| Product Name | Reduced Sleeve Female/Female (F/F) |
| Usage | General plumbing, all reduction applications |
| Body Matter | Brass (Forged or Neckline) |
| Maximum Pressure | PN 16 Bar |
| Connection | ISO 228-1 "G" Gas (BSPP) |
| Manufacturing Method | Forged and machined or bar turning fitting |
| Max. Temperature | Depends on the type of sealing chosen |
| Available Size | From 1/4'' to 2'' (various reductions) |
| Combinations | Diameter | Reference | Stock | Price | Add to cart |
Diameter : A: 3/4'' B: 1/2'' Reference : 1240-3412 | A: 3/4'' B: 1/2'' | 1240-3412 | Available now Stock : 7 | €2.65 TTC | €2.65 TTC |
Diameter : A: 1'' B: 1/2'' Reference : 1240-112 | A: 1'' B: 1/2'' | 1240-112 | Available now Stock : 1 | €4.28 TTC | €4.28 TTC |
Diameter : A: 1''1/2 B: 1''1/4 Reference : 1240-112114 | A: 1''1/2 B: 1''1/4 | 1240-112114 | Available now Stock : 7 | €12.22 TTC | €12.22 TTC |
Diameter : A: 1''1/2 B: 1'' Reference : 1240-1121 | A: 1''1/2 B: 1'' | 1240-1121 | Available now Stock : 2 | €11.57 TTC | €11.57 TTC |
Diameter : A: 1'' B: 3/4'' Reference : 1240-134 | A: 1'' B: 3/4'' | 1240-134 | Available now Stock : 10 | €4.18 TTC | €4.18 TTC |
Diameter : A: 1''1/4 B: 1'' Reference : 1240-1141 | A: 1''1/4 B: 1'' | 1240-1141 | Available now Stock : 2 | €9.50 TTC | €9.50 TTC |
Diameter : A: 1''1/4 B: 3/4'' Reference : 1240-11434 | A: 1''1/4 B: 3/4'' | 1240-11434 | Available now Stock : 6 | €11.06 TTC | €11.06 TTC |
Diameter : A: 2'' B: 1'1/2 Reference : 1240-2112 | A: 2'' B: 1'1/2 | 1240-2112 | Available now Stock : 3 | €20.16 TTC | €20.16 TTC |
Diameter : A: 3/4'' B: 3/8'' Reference : 1240-3438 | A: 3/4'' B: 3/8'' | 1240-3438 | Available now Stock : 9 | €3.82 TTC | €3.82 TTC |
Diameter : A: 1/2'' B: 3/8'' Reference : 1240-1238 | A: 1/2'' B: 3/8'' | 1240-1238 | Available now Stock : 5 | €2.39 TTC | €2.39 TTC |
Diameter : A: 1/4'' B: 1/8'' Reference : 1240-1418 | A: 1/4'' B: 1/8'' | 1240-1418 | Available now Stock : 11 | €1.99 TTC | €1.99 TTC |
Diameter : A: 3/8'' B: 1/8'' Reference : 1240-3818 | A: 3/8'' B: 1/8'' | 1240-3818 | Available now Stock : 8 | €2.32 TTC | €2.32 TTC |
Diameter : A: 1/2'' B: 1/4'' Reference : 1240-1214 | A: 1/2'' B: 1/4'' | 1240-1214 | Available now Stock : 25 | €3.16 TTC | €3.16 TTC |
Diameter : A: 3/4'' B: 1/4'' Reference : 1240-3414 | A: 3/4'' B: 1/4'' | 1240-3414 | Available now Stock : 7 | €4.13 TTC | €4.13 TTC |
Diameter : A: 3/8'' B: 1/4'' Reference : 1240-3814 | A: 3/8'' B: 1/4'' | 1240-3814 | Available now Stock : 7 | €2.57 TTC | €2.57 TTC |