Threaded Adapter / Fitting Detal-met SRgw20x3/4 — PP female 20 mm to 3/4" BSP connection

Detal-met SRgw20x3/4 is a polypropylene (PP) female threaded adapter designed to join a 20 mm metric plastic pipe to a standard 3/4" BSP male threaded fitting. The connector creates a plastic-to-threaded transition suitable for water supply, irrigation and other low-pressure fluid systems where chemical resistance and corrosion-free performance are required. The fitting's simple geometry and molded female thread provide a compact connection point between metric PE/PP piping and equipment or valves with 3/4" BSP male threads.

Advantages

The polypropylene construction ensures resistance to corrosion and many common chemicals while remaining lightweight compared with metal alternatives. As a molded female threaded fitting, it reduces the need for additional sealing parts when combined with standard thread sealant or tape, and it provides dimensional compatibility with 20 mm metric plastic piping. The adapter is suitable for installations where electrical conductivity or galvanic corrosion are concerns, and its plastic composition reduces the risk of scale and rust formation.

Suitable for

• Domestic and commercial water supply lines using 20 mm plastic pipe
• Irrigation systems and garden water distribution
• Connections to valves, hose fittings or equipment with 3/4" BSP male threads
• Low-pressure fluid circuits and non-pressurized return lines

Key specifications

• Material: polypropylene (PP)
• Connection A: female socket for 20 mm metric plastic pipe
• Connection B: female 3/4" BSP threaded port
• Application pressure: suitable for typical low-pressure water and irrigation systems (follow local codes and system design)
• Corrosion resistance: not subject to rust; resistant to many common waterborne chemicals

How to use

Prepare the 20 mm pipe end by cutting squarely and deburring to ensure a clean fit into the 20 mm female socket. For solvent or thermal fusion systems follow the pipe manufacturer’s jointing instructions; for push-fit pipe systems ensure the pipe is fully inserted to the correct depth. Apply appropriate thread sealant or PTFE tape to the male 3/4" BSP thread before engaging the adapter’s female thread, and hand-start the connection to avoid cross-threading. Tighten to a firm hand or light wrench turn as required by the installation context, taking care not to over-torque plastic threads.

Usage recommendations

Use the adapter in systems operating within the pressure and temperature limits recommended for polypropylene components. Avoid exposure to strong oxidizing agents and abrasive fluids. Inspect threaded joints periodically for leaks and re-tighten or replace sealing material as needed during maintenance.