Galvanized Unions
A galvanized union is a zinc-coated malleable cast iron fitting with a nut that allows equipment on a water line to be removed and refitted without turning the pipe. When the nut is opened, the meter, pump or filter separates from the line.
It is used as a maintenance point at water meter, booster set, water heater and filter connections. It is supplied in 6 sizes from 1/2″ to 2″ and with a 1 1/2″ female-threaded 45° type option.
Main Applications
- Water meter inlet and outlet connections
- Booster set and pump maintenance points
- Cold water inlets of water heaters and calorifiers
- Filter and treatment unit connections
- Irrigation control valve groups
- Fire hose cabinet and hose reel connections
Technical Data
| Fitting type | Union with nut |
|---|---|
| Product standard | TS EN 10242, design symbol A (manufacturer information) |
| Material | Malleable cast iron (depending on model) |
| Coating | Hot-dip galvanized |
| Coating mass | Average at least 500 g/m² (sales sheet information) |
| Thread | ISO 7-1 Rp female / R male thread (depending on model) |
| Sizes | 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″ (product range) |
| Special type | 1 1/2″ female-threaded 45° union (product range) |
| Seat | Taper metal or flat face, depending on model |
| Permissible pressure | 25 bar, −20 … +120 °C (EN 10242, design A) |
| Leak test | At least 5 bar air or 20 bar water (sales sheet information) |
| Nut | Hexagonal, zinc-coated malleable iron |
Material Options
| Part | Galvanized malleable iron | Black malleable iron | Stainless steel casting |
|---|---|---|---|
| Body | Malleable iron EN-GJMB-350-10 (depending on model) | Blackheart malleable cast iron B 350-10 | Investment casting, depending on model |
| Nut | Zinc-coated malleable iron | Blackheart malleable cast iron B 350-10 | Stainless casting, depending on model |
| Seat | Depending on model | Depending on model | Depending on model |
| Surface | Hot-dip zinc | Black, uncoated | Stainless, uncoated |
| Pressure rating | 25 bar −20…120 °C (EN 10242) | 25 bar −20…120 °C, 20 bar 300 °C (EN 10242) | Depending on model |
Which material? At meter and booster set connections on domestic water lines a galvanized union gives the same protection as the pipe; black unions are preferred in heating circuits.
Advantages
Fast Meter and Pump Replacement
- Opening the nut separates the equipment from the line
Installation Without Turning Pipe
- The joint is tightened with the nut, the pipes stay fixed
Zinc-Coated Nut
- Nut and body are protected together in wet environments
45° Type Option
- Angled detachable joint in tight spaces
Construction and Design Features
- Union made of body, mating part and hexagonal nut
- All parts hot-dip zinc coated
- Seat type depending on model
- TS EN 10242 design A
Send the union size and quantity; we will also prepare the valves and nipples needed for your meter or booster set group.
How to Choose?
- Identify the equipmentMeasure the connection size of the meter, pump, filter or water heater.
- Choose the sizeUse a union for 1/2″ – 2″ and a taper seat union for larger sizes.
- Check the angleIn tight spaces consider the 45° female-threaded union instead of the straight type.
- Confirm the mediumChoose galvanized unions for domestic water and black unions for closed heating.
Complementary Products
Why ORFA?
Other Galvanized Fittings
Galvanized Wide-Radius Elbows
Galvanized wide-radius elbows are fittings that change direction with a gentle bend on threaded galvanized pipelines.
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Galvanized Crossover Bends
Galvanized crossover bends are curved fittings used to pass over another pipe on threaded galvanized lines.
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Galvanized Elbows
Galvanized elbows are zinc-coated threaded fittings that change direction by 90 degrees on galvanized pipelines.
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Galvanized Reducing Tees
Galvanized reducing tees are fittings used to take a smaller branch off the main run on threaded galvanized lines.
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Galvanized Conical Unions
Galvanized conical unions provide a tight, removable connection on threaded galvanized pipes through a conical seat.
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Galvanized Plugs and Caps
Galvanized plugs and caps are used to close the ends of threaded galvanized pipes and fittings.
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Galvanized Crosses
Galvanized crosses are fittings that split flow in four directions on threaded galvanized pipelines.
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Galvanized Street Elbows
Galvanized street elbows have one female and one male threaded end and change direction on galvanized lines without an extra nipple.
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Galvanized Reducing Sockets
Galvanized reducing sockets are female threaded fittings that join two galvanized pipes of different sizes.
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Galvanized Sockets
Galvanized sockets are female threaded fittings that join two galvanized pipes of the same size in a straight line.
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Galvanized Nipples
Galvanized nipples are short galvanized pieces with male threads on both ends, used to connect two female threaded fittings.
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Galvanized Reducing Bushes
Galvanized reducing bushes are fittings with male and female threads used to change pipe size on threaded galvanized lines.
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Galvanized Tees
Galvanized tees are equal-size fittings used to split flow in three directions on threaded galvanized pipelines.
Details →Get a quote for your project
Our sales team will prepare the best solution for your needs.