The official standard changed to the EN 837 when the European Union was formed and they decided to use the same standards in every country.

Another obvious visual: The G connector ends with a small protrusion (nipple), used to center the gasket. This adapter will convert holes which fit size 1/2" BSPP male threads to a female 1/2" NPT threaded hub. Taper threads, British Standard Pipe Taper thread ( BSPT), whose diameter increases or decreases along the length of the thread; denoted by the letter R.Compared with other same products in the market, this shower hose joint has thicker interface, explosion-proof and pressure-resistant, more durable, suitable for Grohe tap, ballfix valve, the adapter can be applied for 13mm EU taps and 15mm UK faucet, and with the rubber washer make more sealed and leak-proof. Both the A and the B forms connect to the same female thread and seal without a problem in combination with a sealing gasket.

The screw connection is ideal for use on spraying and irrigation systems in, for example, residential complexes or sports fields.

Have you ever looked at a pressure gauge in a pipe assembly and wondered which connection type it has? You can change your choices at any time by visiting Cookie preferences, as described in the Cookie notice. BSP sizes don't match up with what you measure on the scale of a ruler, which can obviously cause some confusion. If you have any questions for our product, please contact us, we will reply to you in under 24 hours. If calipers are handy, a third method is to measure the angle between threads: NPT threads are 60°, while BSP threads are 55°.

Inch BSP - Outlet thread on 3/4 inch outside tap (we have a 7/8 inch BSP brass garden hose tap connector). Parallel (straight) threads, British Standard Pipe Parallel thread ( BSPP; originally also known as [1] British Standard Pipe Fitting thread/ BSPF and British Standard Pipe Mechanical thread/ BSPM), which have a constant diameter; denoted by the letter G. Prefixing with G, is equivalent to adding BSP after the pipe size, although BSPP is more strictly correct to define the parallel version.Even though BSP is now based on metric measurements, this system’s names still reflect their imperial origins. If everything is piped and connected correctly and provided that the right pressure range was selected you should see a reading on the pressure gauge. Im trying to put a pressure gauge on a 55 gallon drum ,i put pressure in the tank but not one pressure gauge will work ,i put the gauge on the top of the tank ,right on the lid , and it wont give me the pressure .