Double reduction screw M-M 1'1/2 to 1"1/4 - DVGW - code: 0245H*G - Maestrini

Double reduced M-M Maestrini screw from 1"1/2 to 1"1/4

The reduced double screw M-M Maestrini is a threaded fitting designed to adapt two male connections when it is necessary to switch from one size to another. In particular, this version allows reduction from 1″1/2 to 1"1/4, proving useful in many installation situations where components with different threads need to be integrated without altering the overall layout of the line.

The product is identified by the supplier code 0245H*G and is indicated as DVGW in the name. It is a practical solution for installations, retrofit interventions, and maintenance, especially when you want to maintain a neat and easily recognizable connection thanks to clearly indicated sizes and code.

Features and details of the fitting

Type: reduced double-ended male screw (M-M)

This double-ended screw is a connecting element with male threading on both sides. The configuration M-M it is typically used to join two components with female entry, or to create a transition point between plant elements that require a male connection.

Size reduction

The main function is the reduction between two thread sizes:

• of 1″1/2
• to 1"1/4

This feature allows easy management of coupling between non-homogeneous components, avoiding improvised solutions and maintaining a cleaner and more maintainable plant logic.

Product identification

• Brand / supplier: Maestrini
• Supplier product code: 0245H*G
• Indication in description: DVGW

In technical contexts (spare parts warehouse, scheduled maintenance, refitting), correct component identification is essential: code and sizes help reduce errors during procurement and replacement.

Typical applications

Hydraulic systems and fittings

• Threaded connections where two elements have different sizes.
• Adaptation between existing components and new spare parts with non-matching threads.
• Maintenance interventions where you want to restore a connection without redesigning the line.

Installations, retrofit, and maintenance

During installation or retrofit, it is common to need to integrate components from different supplies or pre-existing systems. A reduced double-ended screw allows:

• create a size transition in an orderly manner;
• maintaining the connection logic male-male when required by the system configuration;
• simplifying spare parts management thanks to a unique and easily identifiable component.

Use and notes

Verification of sizes and thread type

Before purchase and installation, it is advisable to carefully check:

• that the requested reduction is actually 1″1/2 → 1″1/4;
• that the necessary configuration is male-male (M-M);
• compatibility with upstream and downstream components (fittings, valves, accessories) based on the threads present in the system.

In case of doubts about the size or configuration of the connection, it is good practice to compare the component to be replaced with the product sheet and refer to code 0245H*G.

DVGW indication

The product is listed as DVGW in the designation. If your system requires a specific requirement related to this indication, check the available technical documentation or the specifications required by the project before installation.

Tips for a correct choice

• If you are performing a retrofit, first identify the actual sizes of the existing components.
• For efficient warehouse management, keep the reference Maestrini 0245H*G associated with the sizes.
• When the system requires multiple adaptations, plan the fittings to reduce unnecessary steps and keep the line as simple as possible.

This reduced double screw M-M Maestrini represents an essential and functional solution for those working with threaded connections and needing a reliable and easily identifiable size reduction within the system.

FAQ – Frequently Asked Questions

What is a reduced double-ended M-M screw for?

It is used to adapt a threaded connection when it is necessary to switch between two different sizes while maintaining a male-male configuration, useful for connecting components with female inlets.

Which measurements does this Maestrini model connect?

This model achieves a reduction from 1"1/2 to 1"1/4, as indicated in the product name.

What is the product code of the Maestrini reduced double screw?

The supplier product code shown is 0245H*G, useful for identification and reorder.

In which contexts is it typically used?

It is used in hydraulic systems and fittings, in installations, retrofit, and maintenance, when it is necessary to adapt threads of different sizes with a male-male fitting.