Galvanized Reducing Bushes
A galvanized reducing bush is a zinc-coated malleable cast iron fitting with a male-threaded large end and a female-threaded small end that reduces the size at the port of a galvanized fitting or equipment.
It is used on galvanized tee and cross branches, tank and booster set ports, and tap and pressure gauge connections. 30 size combinations from 1/2″ × 3/8″ to 4″ × 3″ are available.
Main Applications
- Reducing galvanized tee and cross branches
- Small-bore connections to water tank and booster set ports
- Tap and irrigation valve connections
- Pressure gauge and test point connections
- Matching equipment sizes in sprinkler lines
- Connecting smaller pipe to a pump port
Technical Data
| Fitting type | Reducing bush (male-female) |
|---|---|
| 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 | Large end ISO 7-1 R male, small end Rp female thread |
| Size range | 1/2″ × 3/8″ – 4″ × 3″ (product range) |
| Example sizes | 1″ × 1/2″, 1 1/2″ × 3/4″, 2 1/2″ × 1 1/2″, 4″ × 2 1/2″ (product range) |
| Number of sizes | 30 combinations (product range) |
| 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) |
| Female-female transition | With a galvanized reducing socket |
Material Options
| Part | Galvanized malleable iron | Black malleable iron | Stainless steel |
|---|---|---|---|
| Body | Malleable iron EN-GJMB-350-10 (depending on model) | Blackheart malleable cast iron B 350-10 | Investment casting or bar, depending on model |
| Surface | Hot-dip zinc | Black, uncoated | Stainless, uncoated |
| Thread | R male + Rp female | R male + Rp female | Depending on model |
| Pressure rating | 25 bar −20…120 °C (EN 10242) | 25 bar −20…120 °C, 20 bar 300 °C (EN 10242) | Depending on model |
| Suitable media | Cold domestic water, fire and irrigation water | Closed heating water, gas, compressed air | Corrosive media and media requiring hygiene |
Which material? A galvanized reducing bush in a galvanized tee or tank port keeps the zinc protection on the inner surface unbroken; black reducing bushes are used on black lines.
Advantages
Direct Transition at the Port
- Screws into a fitting or tank port, no intermediate piece needed
30 Sizes
- Widest choice up to 4″ × 3″
Flexible Branching
- Outlets of different sizes from equal tees and crosses
Zinc Protection
- The wet inner surface is coated
Construction and Design Features
- R taper male thread on the large end, Rp female thread on the small end
- Body with wrench head (depending on model)
- Hot-dip zinc-coated surface
- TS EN 10242 design A
Send the male large and female small size and the quantity; we will confirm the galvanized reducing bush in stock right away.
How to Choose?
- Measure the port sizeDetermine the female thread size of the port the bush will screw into.
- Determine the connecting sizeMeasure the male thread size of the pipe, tap or appliance at the small end.
- Choose the right fittingChoose a reducing bush to screw into a port and a reducing socket to join two pipes.
- Confirm the mediumChoose galvanized reducing bushes on water and sprinkler lines.
Complementary Products
Why ORFA?
Other Galvanized Fittings
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Galvanized Crossover Bends
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Galvanized Unions
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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 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.