Grooved Concentric Reducers
A grooved concentric reducer joins two pipes of different diameters on the same axis with a smooth cone. Both ends are grooved, so the large and small sides are connected with couplings.
The store range has 36 size combinations from 1½”×1¼” to 8″×6″. It is used for transitions from sprinkler mains to branches, at pump suction and discharge connections and at header outlets.
Main Applications
- Size reduction from sprinkler mains to branches
- Size increase on pump discharge lines
- Matching sizes at header outlets
- Stepped transitions on risers
- Size changes on cooling water lines
Technical Data
| Type | Concentric reducer (common axis) |
|---|---|
| Connection | Both ends grooved; with couplings |
| Size range | 1½”×1¼” – 8″×6″ (product range, 36 combinations) |
| Large end | 1½”, 2″, 2½”, 3″, 4″, 5″, 6″, 8″ |
| Small end | 1¼” – 6″ (depending on large end) |
| Body | Ductile iron GGG 40.3 (manufacturer data) |
| Gasket | None on the reducer; coupling gasket is used |
| Finish | Painted (by model) |
| Working pressure | Per the coupling and pipe used |
Material Options
| Part | Concentric reducer |
|---|---|
| Body | Ductile iron GGG 40.3 |
| Ends | Grooves on large and small ends |
| Sealing | EPDM gaskets of the couplings |
| Finish | Painted (by model) |
Which material? On horizontal pump suction lines an eccentric reducer is often required to prevent air pockets; the fittings on this page are concentric, so ask us for suction lines.
Advantages
Wide Size Choice
- 36 size combinations
Smooth Flow
- Stepless conical transition
Weld-Free Transition
- Both ends joined with couplings
One System
- Same groove size as tees and elbows
Construction and Design Features
- One-piece cast conical body
- Grooves machined on large and small ends
- Inner cone that narrows the flow without steps
- End lengths suited to coupling assembly
Write the large and small end sizes; we will quote the reducer together with two couplings.
How to Choose?
- Write the size pairState the large and small end, for example 4″×2″.
- Confirm the typeCheck whether an eccentric reducer is needed on pump suction.
- Add the couplingsAllow two couplings of different sizes per reducer.
- Check stock sizesAsk whether it is among the 36 combinations.
Complementary Products
Why ORFA?
Other Grooved Pipe Fittings
Threaded Mechanical Tees
Threaded mechanical tees are used to take a threaded branch off a pipeline without welding.
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Reducing Couplings
Reducing couplings join two grooved pipes of different sizes.
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U-Bolt Mechanical Tees
U-bolt mechanical tees are fixed to the pipe with a U-bolt and give a branch without welding.
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Grooved 45° Elbows
Grooved 45° elbows change direction by 45 degrees on grooved pipelines and are joined with couplings.
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Grooved 90° Elbows
Grooved 90° elbows change direction by 90 degrees on grooved pipelines and are joined with couplings.
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Grooved Flexible Couplings
Grooved flexible couplings join grooved pipes while allowing some angular movement and vibration.
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Grooved Equal Tees
Grooved equal tees split flow in three directions of the same size on grooved pipelines.
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Grooved Flanges
Grooved flanges connect a grooved pipe end to a flanged valve or piece of equipment.
Details →
Grooved Flange Adaptors
Grooved flange adaptors move a grooved pipeline to a flanged connection.
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Grooved Crosses
Grooved crosses split flow in four directions on grooved pipelines.
Details →
Grooved Caps
Grooved caps close the end of a grooved pipe and are joined with a coupling.
Details →
Grooved x Threaded Concentric Reducers
Grooved x threaded concentric reducers have one grooved end and one threaded end and change pipe size.
Details →
Grooved Mechanical Tees
Grooved mechanical tees give a grooved branch through a hole cut in the pipe, without welding.
Details →
Grooved Rigid Couplings
Grooved rigid couplings join grooved pipes with a fixed, solid connection.
Details →Get a quote for your project
Our sales team will prepare the best solution for your needs.