Description
PVC Threaded Reducing Bush – PVC-U BSP Threaded Fitting
Our PVC Threaded Reducing Bush is a corrosion-resistant PVC-U threaded pipe fitting for water distribution, agricultural irrigation, swimming pools, water treatment and compatible industrial fluid systems. Reduce a larger female BSP threaded port to accept a smaller male BSP fitting.
Designed for straightforward assembly with compatible threaded components, this male to female BSP reducing bush offers a lightweight alternative to metal fittings. Confirm fluid compatibility and the specific fitting rating for your application.
Key Features & Benefits
- Material: Rigid PVC-U (unplasticised polyvinyl chloride)
- Connection: Male BSP x smaller female BSP
- Applications: Irrigation, water transfer, pool systems and suitable industrial pipework
- Benefits: Corrosion-resistant, lightweight and easy to maintain
- Installation: Compatible BSP threaded connections; do not overtighten plastic threads
Technical Specifications
| Specification | Details |
|---|---|
| Fitting | PVC Threaded Reducing Bush |
| Material | PVC-U |
| Connection type | Male BSP x smaller female BSP |
| Sizing | Nominal BSP thread size (select variant) |
BSP Thread Sizes – Male Thread Outside Diameter
BSP sizes are nominal: a 1" BSP thread does not measure 25.4 mm across the outside. To identify the thread size, measure across the widest outside edges of the male thread using a vernier caliper, then compare your measurement with the table below. These dimensions are for identifying BSP threads, not the outside diameter of PVC pipe.
| Nominal BSP Size | Male Thread OD (Approx.) |
|---|---|
| 1/2" | 21.0 mm |
| 3/4" | 26.4 mm |
| 1" | 33.2 mm |
| 1 1/4" | 41.9 mm |
| 1 1/2" | 47.8 mm |
| 2" | 59.6 mm |
| 2 1/2" | 75.2 mm |
| 3" | 87.9 mm |
| 4" | 113.0 mm |
How to measure: (1) Measure the outside diameter across the male thread crests. (2) Find the nearest value in the table. (3) Check whether your fitting needs a male or female connection and whether the thread is parallel (BSPP) or tapered (BSPT). A female thread's internal measurement is different from the male OD shown here.
Applications & Installation Advice
Reduce a larger female BSP threaded port to accept a smaller male BSP fitting. Match both the nominal BSP size and the male/female thread configuration before ordering. Use a suitable sealing method for the actual thread form and mating components. Avoid excessive PTFE tape or force, which can split plastic fittings. Pressure capability reduces as temperature increases; verify the manufacturer's pressure-temperature rating before use. PVC-U systems should not be used above 60°C.
Not Sure What BSP Thread Size You Need?
Our T-mex Express Tech Hub explains how to measure threaded PVC fittings, identify nominal BSP sizes and choose the correct male or female connection.
Read Our PVC Thread Size Guide →© All text and product images are the intellectual property and copyright of T-mex Express