Connection Water Meter Brass Free Nut | 7000 Series Compression

The Series 7000 straight brass compression fitting with female free nut is a high-precision technical solution designed to facilitate the connection of polyethylene pipes (HDPE or LDPE) to fixed threaded equipment. Thanks to its swivel nut, this fitting can be installed quickly and without twisting the pipe, making it the ideal accessory for mounting water meters, mains valves or filtration equipment. Made from CW617N brass, it ensures maximum durability for drinking water supply, irrigation and professional sprinkler systems.

The advantage of the loose nut for stress-free assembly

The key feature of this fitting is its female union nut. Unlike a fixed female fitting, the swivel nut allows the fitting to be screwed onto a male thread without having to rotate the PE pipe or fitting body. This feature is crucial when working in confined spaces or on pipes that have already been laid. The thread conforms to ISO 228-1 (BSPP), guaranteeing universal compatibility with standard plumbing equipment. This saves the installer a considerable amount of time and prevents unnecessary mechanical stress on the network.

PN25 performance and robustness of CW617N brass

This straight union with free nut makes no compromises on strength. It is certified to withstand a nominal pressure of PN 25 bar for diameters ranging from 16 mm to 50 mm, offering an exceptional safety margin against water hammer. For sizes over 50 mm, it maintains robust reliability at PN 16 bar. The H62 brass toothed ring provides a powerful mechanical anchor on the polyethylene pipe, while the O-ring (in NBR or EPDM) ensures a perfect seal over a temperature range from 0°C to +50°C.

Flat sealing and ergonomic clamping

The design of this fitting incorporates wide, flat sealing surfaces, specifically studied to guarantee a perfect flat seal (from 1 mm thickness). This feature eliminates the need for PTFE tape or wadding on the female part, facilitating future maintenance. For secure assembly, the fitting body is fitted with retaining flats adapted to market wrenches, while the PE pipe clamping nut is extra-wide for easy screwing. Compliant with DIN 8076, every detail is optimized for hydraulic performance.

Technical specifications

Sanitary compliance and professional applications

Fully compliant with the decree of May 29, 1997 on human consumption, this free nut fitting is particularly popular for domestic and municipal drinking water installations. Its ability to provide a removable connection without cutting the pipe makes it a strategic choice for areas requiring frequent checks or equipment replacement. Whether for irrigation or sprinkler systems, the sturdiness of CW617N brass and the H62 ring ensure total peace of mind in the face of ageing installations.