Pump Outlet, Hose Tail and Bore: Matching the Three Sizes

A “2-inch pump” and a “2-inch hose” do not, by themselves, define a complete connection. The pump marking may describe a thread, the adaptor marking a hose tail, and the hose size its internal bore. Record each separately before ordering a discharge or suction hose. For practical symptoms, also review the checks for low pump flow, 32 vs 40 mm pipe selection, suction hose collapse, a hose slipping off its fitting.

Identify which side of the pump the hose serves

A submersible pump discharge hose carries water away from the pump outlet. A surface pump suction hose carries water towards its inlet. A deep-well riser is another application and should not be selected from the same description alone.

This guide concerns connection identification, not pump-duty or pressure-loss calculations. Begin the enquiry with the pump model and whether the proposed hose is on the inlet or outlet side.

Keep three measurements separate

For a threaded pump outlet, record the nominal thread designation, male or female form and required thread standard. A ruler measurement across the outside of the thread is not the hose bore.

Next identify the size and profile of the hose tail. Finally check the actual internal diameter of the chosen hose. Converting inches into millimetres does not establish thread compatibility, sealing performance or a suitable fit between these components.

Turn “2 inch” into an actionable enquiry

Send readable photographs of the pump label and existing outlet connection. If an adaptor has already been fitted, identify the original pump connection separately from the adaptor’s hose end.

Keep “2-inch hose” in the enquiry description, but confirm the exact product size and matching connection before ordering. Forcing a hose onto a tail, or observing that two parts appear to fit, does not prove that the assembly is suitable for operation.

Compare the suction-hose series without assuming compatibility

The Standard Yellow, Heavy-Duty Yellow, Standard Green and Heavy-Duty Green Suction series provide product options to examine. Considering them for a submersible pump discharge does not mean every size is suitable for every pump or liquid.

Confirm the conveyed liquid, operating conditions, required pressure or vacuum capability and connection hardware for the selected product. Colour, the heavy-duty name and visible wall thickness are not substitutes for verified working limits.

Build a complete quotation request

Include pump make/model, outlet thread and gender, existing adaptor, required hose bore, liquid, route length, elevation difference, number of coils and destination. Mark any measurement that still needs confirmation.

Hoses are sold in full coils. A price per metre is a comparison unit; the order total depends on the verified coil length and coil quantity for the selected size. Stock, coil length, fittings and dispatch arrangements are confirmed in the written quotation.

Related products and sizes

• Standard Yellow Suction Hose
• Heavy-Duty Yellow Suction Hose
• Standard Green Suction Hose
• Heavy-Duty Green Suction Hose

The cover is an illustrative product scene, not a real site record, installation instruction or product test.