Female Thread Pipe Connector PVC Fittings Straight Adaptor 20mm 25mm 32mm

A female thread straight adaptor has a female (internal) BSP thread on one end that accepts a male-threaded fitting, valve, or pump port, and a plain slip socket on the other end that accepts a standard PVC pipe for solvent-weld bonding. This allows you to connect threaded equipment directly to a plain PVC pipe run in a single fitting, without needing separate couplings or reducers.

The inner diameter (e.g., 20mm, 25mm, 32mm) refers to the bore of the plain pipe end — match this to the nominal outer diameter of your PVC pipe. The thread size (e.g., ½″, ¾″, 1″ BSP) refers to the female thread end — match this to the male thread on your valve, pump, or fitting. Check the markings on your existing valve or measure the male thread with a thread gauge if unsure.

Yes. Apply 2–3 layers of PTFE (polytetrafluoroethylene) thread-seal tape clockwise around the male threads of the valve or fitting before screwing it into the female thread of the adaptor. This compresses to fill the thread gaps and creates a leak-free seal. Do not over-tighten — hand-tight plus approximately one additional quarter-turn is typically sufficient for PVC fittings.

Use a UPVC-rated solvent cement (not ABS cement). Clean and dry both the pipe end and the socket, apply a thin even coat to both surfaces, push the pipe fully into the socket with a slight twist, and hold for 30 seconds. Allow at least 15 minutes before handling and 24 hours before pressure testing. The solvent-weld joint fuses the pipe and fitting into a single piece for a leak-free, permanent connection.

No. Standard PVC is rated for cold-water service only, typically up to 60 °C (140 °F) under reduced pressure. For hot-water supply lines, use CPVC or brass fittings with the appropriate BSP thread. These adaptors are designed for cold-water supply, irrigation, and pressure distribution applications.

Color choice is typically based on your system’s color-coding convention. White is common for general plumbing and potable cold-water lines. Blue is often used for potable water or irrigation systems. Grey is standard for UPVC pressure pipe systems. All three colors are made from the same PVC material and perform identically — choose the one that matches your existing pipe or fittings for a consistent look.

Count the number of threaded-to-plain transition points in your system, then select the pack quantity that matches or slightly exceeds that number. The 5-pack, 10-pack, and 20-pack options offer a lower per-unit cost compared to ordering singles, making them practical for multi-zone irrigation systems, manifold builds, or any project with multiple connection points of the same size and thread combination.