Reduced Male-Male PVC-U nipple to be screwed in PN16: The high-pressure thread adapter

The threaded PVC-U reduced nipple is the essential transition connection for connecting two threaded elements (females) of different diameters on the same axis. Designed to reduce or increase the fluid cross-section under pressure, this screw-in male-to-male (MM) model is certified to withstand a pressure rating of 16 bar (PN16). It is the ideal precision solution for matching the output of a pump, filter or valve to the size of your main network.

Robust adaptation for variable hydraulic networks

The construction of this reduced nipple in PVC-U (unplasticized polyvinyl chloride) guarantees excellent dimensional stability in the face of pressure changes. Its PN16 certification makes it suitable for professional water treatment and irrigation installations. Unlike glue-in reductions, the screw-in nipple allows you to change the diameter of your installation in a modular and reversible way, facilitating the integration of new equipment without having to restructure the entire pipework.

Gas Thread Versatility (BSP) and Flow Transition

The screw-in male reduced nipple is particularly popular for its ability to serve as an interface between components with different calibers:

• Diameter interconnection: Allows a large diameter valve to be connected to a smaller pipe, or a measurement accessory (such as a flow meter) to be adapted to a standard pipe.

• Chemical and anti-corrosion resistance: Completely insensitive to limescale, oxidation and fertilizers, it surpasses metal reductions in terms of longevity, especially in saline (salt pool) or agricultural environments.

• Controlled hydraulic flow: Its tapered internal shape limits turbulence during section changes, thus preserving the flow and pressure of the circuit.

Installation and professional sealing advice

To guarantee a PN16 performance without any leakage at the reduction level, the installation must be carried out methodically on both threads:

1. Thread preparation: Carefully apply PTFE (Teflon) tape or a specific sealing wire to the two outer threads (the small and large diameter).

2. Aligning the Axes: Engage the larger diameter by hand first to stabilize the fitting, then do the same for the small diameter to avoid screwing askew.

3. Final Clamping: The body of the fitting often has a central hex indentation. Use a right-sized open-end wrench or a strap wrench to finalize the tightening without forcing the plastic structure, thus ensuring a compression seal.

Areas of application: Swimming pool, Watering and Industry

This reduced nipple is a standard for the adaptation of the inlets/outlets of filter pumps and pool heaters. In the agricultural sector, it allows the passage between the main pipes and the secondary sprinkler booms. Its food neutrality and structural robustness also allow it to be integrated into industrial fluid distribution networks where the precision of the connection between devices of various diameters is essential.

Technical characteristics