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Suction Hose Couplings and Wrenches

Suction Hose Couplings

UK MADE PRODUCTS

These couplings are used to connect together suction hoses. The coupling halves are normally threaded with a special round thread to B.S. 336 1965 (3 urban round threads and 2 hydrant round threads are also commonly used and other threads may be produced if required) and screwed together to compress a sealing washer. Unlike the instantaneous coupling, this arrangement produces an effective seal under suction conditions.

Hoses are fitted to the coupling halves by sliding them over the tails and clamping by means of external clips. Double-serrated and multi serrated tails are available.

The direction of flow of water is conventionally from the female half to the male half of a coupling. The threaded portion of the female half only swivals relative to the tail so that the coupling halves may be screwed together without twisting the hose.

The standard B.S. 336 female swivel section is captive on the tail section but a cheaper drop through design is produced with a non-captive swivel, which can be withdrawn over the tail section.

The female half has four diametrically protruding pin lugs and the male half has two similar lugs for tightening the coupling. Small coupling wrenches to suit a given size of coupling or larger universal wrenches are available for this purpose.

Suction couplings are produced with only one tail size for a given nominal bore so that an adaptor must be used if it is necessary to join different sizes of hose.

When ordering, the following requirements should be specified:- nominal bore, standard or drop through design, standard round thread, urban round thread (3 drop through only) or hydrant round thread (2 only), multi-serrated or double-serrated tails, polished or unpolished.

Hydrant Round Thread

Hydrant Round Thread

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Suction Hose Coupling

Suction coupling 17.21

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Suction Coupling 'Drop Through' Pattern

Suction Coupling 'Drop Through' Pattern

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Suction Wrench

Suction Wrench

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