It is not recommended to run within the maximum pressure limits for prolonged periods of time as this can severely deteriorate the hose and fittings life span. Taper threads, British Standard Pipe Taper thread (BSPT). These are sometimes denoted by the letter R, for example R 1/2" means a taper 1/2 inch BSP thread. The standard ISO 7 - Pipe threads where pressure-tight joints are made on the threads consists of the following parts: BES has all the steel fittings you need, from screwed stainless steel elbows to hose tail adaptors. Some of the most popular product types within this range would include:

Below is a summary of the common BSP thread sizes in used with cast iron radiators and their corresponding actual outside diameters in millimetres. The actual outside diameter is what you can measure when looking at a valve tail, a threaded nipple, reducing bush or an opening in the radiator. BSP Sizes In Millimetres Nominal The threads are rounded equally at crests and roots by circular arcs ending tangentially with the flanks where r ≈ 0.1373 P The terminology for the use of G and R originated from Germany ( G for gas, as it was originally designed for use on gas pipes; R for rohr, meaning pipe.) Malleable iron fittings are perfect for a wide variety of uses. They are highly durable and very popular in the plumbing industry as they can be used in commercial and residential applications. Brass pipe fittings are suitable for connecting copper tubes, stainless steel tubes and plastic pipes that have compatible outside diameters. Pipe fittings have various connection types including compression, push fit, threaded and solder and are ideal for all plumbing work.

Why use malleable iron fittings?

Use a tape rule (or vernier gauge) to measure across the outside of the male thread. Note that a thread that measures G is the international standard shorthand for BSPP - BSP Parallel threads. R is the standard for BSPT - BSP Tapered. Parallel (G) threads are used where the seal is made on a mating face, like inside a cast iron radiator with the aid of a gasket. Tapered fittings achieve a tight thread-to-thread seal with the help of a little sealant such as PTFE tape or hemp and Boss White. Right first time In Japan JIS tapered and parallel threads are common and are interchangable with the respective BSPT and BSPP threads,

this can vary. Smaller sizes can be 1.0mm thread pitch, and larger sizes can be 2.0mm thread pitch. Other variations Our stainless steel hose tail adaptors can be used to connect a hose to a threaded pipe, providing a high-quality, reliable join. Sizes range from 1/4” to 4”. Inch BSP - Outlet thread on 3/4 inch outside tap (we have a 7/8 inch BSP brass garden hose connector).All Metric fittings are not supplied with any sealing equipment and require the use of PTFE/Teflon tape when being installed.

DZ or DZR symbol stamped on brass components means that the part is dezincification resistant. Dezincification is a form of corrosion that can occur within a plumbing and heating system. How to measure bronze fittings? In Europe Metric (DIN) pipe threads are common on German machines. These generally have a 1.5mm thread pitch, although The threaded part(s) of plumbing fittings are usually made to a British Standard Pipe Thread size (BSP).

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Please use a suitable tool to fasten and remove the fittings through the outer hexagon or inner hexagon of the fitting body. When tightening the fittings threads, please refer to the recommended torque amount listed in the recommended torque values information above. If the torque amount exceeds the recommended value, it can cause stress to the threads and may cause the fitting to break, or the gasket to deform and cause the fitting to leak.