We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

GRUVLOK Metal Pipe Straight: Concentric Reducer, 4 in x 2 in, Ductile Iron - Grooved Pipe Fittings
GRUVLOKGrooved Pipe Fittings

GRUVLOK Metal Pipe Straight: Concentric Reducer, 4 in x 2 in, Ductile Iron

The GRUVLOK Metal Pipe Straight: Concentric Reducer is a grooved pipe fitting in ductile iron, sized 4 in x 2 in, with a maximum operating pressure of 300 psi @ 150° F. 3G Electric sources this OEM part (MPN…

SKU 3G-OTH-460908

Brand
GRUVLOK
Item
Metal Pipe Straight: Concentric Reducer, 4 in x 2 in, Ductile Iron
Category
Grooved Pipe Fittings
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

GRUVLOK
Manufacturer Part Number
0390028629
Type
4 in x 2 in, Ductile Iron, 300 psi @ 150° F
Fitting Pipe Size
4 in x 2 in
Maximum Operating Pressure
300 psi @ 150° F

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

GRUVLOK Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The GRUVLOK Metal Pipe Straight: Concentric Reducer is a grooved pipe fitting in ductile iron, sized 4 in x 2 in, with a maximum operating pressure of 300 psi @ 150° F. 3G Electric sources this OEM part (MPN 0390028629) across 14 industrial departments, with specialist depth in combustion, pumps and controls as an authorised distributor.

Frequently Asked Questions

What is a GRUVLOK concentric reducer used for?

A GRUVLOK concentric reducer connects pipes of different diameters in grooved piping systems, typically for fire protection, HVAC, or industrial process lines. It reduces flow from a 4 in to a 2 in line while maintaining a straight run, using ductile iron construction rated to 300 psi @ 150° F.

What are the specifications of the GRUVLOK 4 in x 2 in concentric reducer?

The GRUVLOK metal pipe straight concentric reducer (MPN 0390028629) is a grooved fitting in ductile iron, sized 4 in x 2 in. Its maximum operating pressure is 300 psi @ 150° F. This OEM part is designed for use with grooved-end pipe and couplings in commercial and industrial applications.

Where to buy a GRUVLOK concentric reducer worldwide?

3G Electric supplies the GRUVLOK concentric reducer (MPN 0390028629) to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this ductile iron grooved fitting.

How to install a GRUVLOK grooved concentric reducer?

Installation follows standard grooved-pipe practices: lubricate the gasket, place it over the pipe end, insert the reducer, then slide the coupling housing over the groove and tighten bolts evenly to the manufacturer’s torque spec. Always verify alignment and pressure rating (300 psi @ 150° F) before system pressurization.

Used in

Common applications for GRUVLOK
Fire-protection systems — GRUVLOK ductile iron butterfly valves (e.g., SKU 3DVX7) for water-based sprinkler and standpipe networks.
Chemical processing — GRUVLOK carbon steel butterfly valve with 316 stainless steel disc (SKU 60WR76) for handling corrosive media.
General water distribution — GRUVLOK ductile iron butterfly valve with EPDM seat (SKU 60WR98) for municipal or industrial water lines.
HVAC piping — GRUVLOK grooved-end butterfly valves for chilled water or hot water systems requiring quick installation.
Industrial process control — GRUVLOK lever-operated butterfly valve (SKU 60WR82) for throttling or isolation in chemical media applications.

GRUVLOK Products

3G Electric supplies GRUVLOK grooved pipe fittings. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from GRUVLOK

View all GRUVLOK parts
Grooved pipe fitting for connecting pipes of different diameters in mechanical piping systems. Ductile iron construction with 12 in x 10 in sizes. Rated to 300 psi at 150° F. Used in HVAC, fire protection, and industrial process lines
GRUVLOK
Grooved pipe fitting for connecting pipes of different diameters in mechanical piping systems. Ductile iron construction with 12 in x 10 in sizes. Rated to 300 psi at 150° F. Used in HVAC, fire protection, and industrial process lines
This GRUVLOK straight pipe fitting is designed for grooved-end piping systems, providing a mechanical joint for connecting steel or other grooved-end pipes. It enables fast installation without welding or threading. Overall length is 2 1/16 inches
GRUVLOK
This GRUVLOK straight pipe fitting is designed for grooved-end piping systems, providing a mechanical joint for connecting steel or other grooved-end pipes. It enables fast installation without welding or threading. Overall length is 2 1/16 inches
This grooved pipe fitting is made of ductile iron and sized 2 in x 1 in. It is rated for a maximum operating pressure of 300 psi at 150° F. Used in industrial piping systems for connecting or redirecting pipe sections in applications such as fire protection, HVAC, and process systems
GRUVLOK
This grooved pipe fitting is made of ductile iron and sized 2 in x 1 in. It is rated for a maximum operating pressure of 300 psi at 150° F. Used in industrial piping systems for connecting or redirecting pipe sections in applications such as fire protection, HVAC, and process systems
Concentric reducer for transitioning between 6-inch and 4-inch grooved-end pipes. Features grooved x grooved connections for mechanical joining. Used in industrial piping systems to change flow diameter while maintaining a leak-resistant joint
GRUVLOK
Concentric reducer for transitioning between 6-inch and 4-inch grooved-end pipes. Features grooved x grooved connections for mechanical joining. Used in industrial piping systems to change flow diameter while maintaining a leak-resistant joint
Grooved pipe elbow with 11 1/4° angle, designed for 5-inch schedule steel pipe. Used to change direction in metal piping systems for fire protection, HVAC, and industrial process lines
GRUVLOK
Grooved pipe elbow with 11 1/4° angle, designed for 5-inch schedule steel pipe. Used to change direction in metal piping systems for fire protection, HVAC, and industrial process lines
This grooved pipe fitting connects pipes of different diameters, reducing from 3 in to 2 in while maintaining a grooved joint interface. It is used in industrial piping systems such as HVAC, fire protection, and process piping to prevent air or sediment accumulation. The fitting features grooved x grooved connections and measures 9 1/2 in in length
GRUVLOK
This grooved pipe fitting connects pipes of different diameters, reducing from 3 in to 2 in while maintaining a grooved joint interface. It is used in industrial piping systems such as HVAC, fire protection, and process piping to prevent air or sediment accumulation. The fitting features grooved x grooved connections and measures 9 1/2 in in length
Concentric reducer grooved pipe fitting with 4-inch grooved end and 3-inch threaded end, 3-inch length. Used to reduce flow diameter in piping systems for water, HVAC, and fire-protection applications
GRUVLOK
Concentric reducer grooved pipe fitting with 4-inch grooved end and 3-inch threaded end, 3-inch length. Used to reduce flow diameter in piping systems for water, HVAC, and fire-protection applications
Grooved pipe fitting for branching a pipeline at a 45-degree angle. Made of carbon steel with an EPDM seal, featuring grooved x grooved connections for 2 1/2 in pipe. Used in fire protection, HVAC, and industrial piping systems for water and mild chemical service
GRUVLOK
Grooved pipe fitting for branching a pipeline at a 45-degree angle. Made of carbon steel with an EPDM seal, featuring grooved x grooved connections for 2 1/2 in pipe. Used in fire protection, HVAC, and industrial piping systems for water and mild chemical service