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Galvanised Pipe Fittings
44 products · Pumps and Hydraulics
Galvanised fittings are the threaded galvanised steel fittings used to connect pipework: galvanising protects the metal from corrosion. They are used in fluid distribution systems in the workshop, on site and in the maintenance of existing installations.
Types of fitting in the collection
- Male/male nipples: for joining two female-threaded elements.
- Sockets, including reducing female/female types: for joining pipes or changing to a different diameter.
- Reducers: for connecting pipes of different sizes.
- Unions and three-piece fittings: for dismantling a section of pipework without removing all of it, useful in maintenance.
How to choose
Check the thread size, expressed in BSP inches, and the type of connection, male or female, on both sides. Then choose the shape according to the route of the pipework. For a proper seal on the threads, use sealing tape or thread suited to the fluid being carried.
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Frequently asked questions: Galvanised Pipe Fittings
What are galvanised fittings and what are they used for?
Galvanised fittings are the range of threaded galvanised steel fittings, such as nipples, sockets, reducers, plugs and elbows, used to connect pipework. Galvanising protects the metal from rust. They are used in workshops, on sites and in the maintenance of existing fluid distribution systems.
Galvanised or brass: which fitting should I choose?
Galvanised steel is robust and is used for steel connections, with a wide range of shapes. Brass resists corrosion well and lends itself to precise joints. The catalogue has both: the choice depends on the fluid, the environment and the material of the existing pipework.
How do I read the sizes of a threaded fitting?
The sizes of threaded fittings are expressed in inches, and the thread must match that of the pipe or of the other fitting. The catalogue shows sizes such as 2 1/4 inch or 2 1/2 inch, often in the title. If the thread and size do not match, the seal will not hold.
Can I connect brass and galvanised steel fittings?
Yes, but with care: two different metals in contact in the presence of moisture can cause galvanic corrosion, which attacks the less noble metal, in the case of galvanised steel the zinc. To limit the problem, insulating gaskets are used and the system is checked over time. It is advisable to ask a technician which fitting is best suited to the joint.
Are these fittings suitable for gas and drinking water?
The manufacturer's technical data sheet states the working pressure and the fluids the fitting is intended for, and it must be checked case by case. For gas, drinking water and heating systems there are specific rules on materials and sealing, which follow the design of the system. Do not use a fitting for a fluid other than the one stated without first checking with a technician.
How do I seal a threaded joint?
The joint is sealed with hemp and a sealing paste suited to the fluid, or with PTFE tape. The material is wound onto the male thread in the direction of tightening, then the joint is screwed up without forcing it. After assembly, a leak test is carried out before pressurising the system.
Which fittings do I need to disconnect a section of pipework?
To take out a section without dismantling the whole system you need three-piece unions, which separate with a nut. To change direction you need elbows and tees, while sockets and reducers connect pipes of the same or different size. Choose the fitting according to the point of the system to be modified and check the size before buying.