Galvanized Reducing Sockets

A galvanized reducing socket is a zinc-coated malleable cast iron fitting with two female-threaded ends that joins two galvanized pipes of different sizes in a straight line.
It is used for transitions from a water main to a smaller distribution line, from a booster set outlet to a service line and from an irrigation main to branch lines. 21 sizes from 1/2″ × 3/8″ to 4″ × 3″ are available.
Main Applications
- Transition from water main to distribution line
- Matching booster set and pump port sizes
- Transition from irrigation main to branch lines
- Stepwise size reduction in sprinkler lines
- Pipe size changes at tank outlets
- Joining pipes of different sizes in renovations
Technical Data
| Fitting type | Reducing socket, two female-threaded ends |
|---|---|
| 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 parallel female thread, different size on each end |
| Size range | 1/2″ × 3/8″ – 4″ × 3″ (product range) |
| Example sizes | 3/4″ × 1/2″, 1 1/4″ × 1″, 2″ × 1 1/4″, 3″ × 2 1/2″ (product range) |
| Number of sizes | 21 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) |
| Male-female transition | With a galvanized reducing bush |
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 1.4408 (AISI 316 equivalent), depending on model |
| Surface | Hot-dip zinc | Black, uncoated | Stainless, uncoated |
| Thread | ISO 7-1 Rp female thread (two sizes) | ISO 7-1 Rp female thread (two sizes) | 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? At size transitions between galvanized pipes a galvanized reducing socket keeps the coating continuous; black reducing sockets are used on black pipes.
Advantages
Size Transition in One Piece
- One body instead of a socket and reducer
Coating Continuity
- Zinc protection is not interrupted at the transition
21 Sizes
- Wide choice up to 4″ × 3″
Straight Line
- The transition stays on the pipe axis without a turn
Construction and Design Features
- Two Rp female-threaded ends of different sizes on the same axis
- Stepped internal transition from the large to the small end
- Hot-dip zinc-coated body
- TS EN 10242 design A
Send the large and small size and the quantity; we will confirm the galvanized reducing socket in stock right away.
How to Choose?
- Measure both pipe sizesDetermine the large and small pipe sizes to be joined.
- Choose the fittingUse a reducing socket if both sides are pipe and a reducing bush if one side is a female port.
- Write the sizeUse the order large × small when ordering.
- Confirm the mediumChoose galvanized fittings on water and irrigation lines.
Complementary Products
Why ORFA?
Other Galvanized Fittings

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Galvanized Elbows
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Galvanized Reducing Tees
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Galvanized Conical Unions
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Galvanized Plugs and Caps
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Galvanized Crosses
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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 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.
