Help Us To Help YOU! Please Use The Links Below
 |
CLICK HERE TO EMAIL FOR TAP SPARE PARTS HELP |
|
|
|
 |
CLICK HERE TO EMAIL FOR TOILET SPARE PARTS HELP |
|
|
Below is a guide to the most common parts
Click on Links below:
How To Measure Tap & Shower Cartridges
Tips on sending Shower Door Photos
Tips on sending Shower Valve Photos
Tips on sending Tap Cartridge or Valve Photos
Tips on sending Toilet Seat Photos
Tips on sending Toilet Spare Parts Photos
Tips on sending Tap Aerator Photos
What are BSP thread sizes?
British Standard Pipe (BSP) thread is a standard thread type used extensively across the globe for plumbing connections (but not in North America). The standard defines the number of threads per inch (pitch) as well as the angle that each thread is engineered to. BSP threads have rounded valleys and troughs with a 55 degree pitch (this is known as Whitworth type).
There are two types of BSP threads; Tapered (BSPT) and parallel (BSPP). The vast majority of BSP threads for water fittings are parallel.
BSP sizes are always in imperial measurements and some have commonly metricised names. The table below summarises BSP sizes to help with general identification. Major diameter is slightly less than the actual outside diameter of the threads. Minor diameter is the measurement of the inside of a female threaded connection, from thread to thread.
| BSP Size | Also Known As | Actual Diameter (Imperial) | Actual Diameter (Metric) |
| 1/8" | 0.35 inch | 9mm | |
| 1/4" | 1/2 inch | 12mm | |
| 3/8" | 6/10 inch | 15mm | |
| 1/2" | 15 BSP | 3/4 inch | 19mm |
| 5/8" | 18 BSP | ||
| 3/4" | 20 BSP | 1 inch | 25mm |
| 1" | 25 BSP | 1 & 1/4 inch | 31mm |
| 1 & 1/4" | 1 & 2/3 inch | 40mm | |
| 1 & 1/2" | 1 & 3/4 inch | 45mm | |
| 2" | 2 & 1/4 inch | 57mm | |
| 2 & 1/2" | 2 & 7/8 inch | 73mm | |
| 3" | 3 & 1/3 inch | 85mm |
Contact Us
sales@bathroomspareparts.co.uk
02039409330
Unit 2 Haslemere Industrial Estate, Charlton Mead Lane, Hoddesdon, EN11 0DJ
