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Suction hoses

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A suction hose is selected for the inlet side of a pump. It must withstand the negative pressure created there; an ordinary delivery hose may collapse under these conditions. Start with the pump's approved hose specifications, the medium and the suction connection.

3 products

Map out the inlet line

Point Required information Result
Pump Specified suction hose, connection type and size from the instructions Rule out unapproved hose designs
Intake point Medium, distance and elevation difference relative to the pump Check against the pump's documented operating limits
Hose Internal diameter, required length and suitability for negative pressure Compare only suitable suction hoses
Ends Both connections and only the additional parts required by the pump instructions Put together a complete inlet line

Example: a pump positioned away from the intake point

Measure the line route and note the elevation difference. Then take the suction connection and permitted inlet line specifications from the instructions for the specific pump. If a hose is specified only for the pressure side or its suitability for negative pressure is not stated, rule it out even if its connection size fits.

Shop separately for the suction and pressure sides

GARDENA explicitly describes its reinforced suction hoses as intended for the suction side and warns against using them on the pump's outlet side. Parker, in turn, requires a hose capable of withstanding vacuum and system pressure for every suction application. For the outlet side, see Pressure hoses; for an overview, see Hoses and hose accessories.

Technical references: GARDENA: suction hoses belong on the suction side; Parker: Safety Guide for hose and fitting selection. The specific design, dimensions and operating limits must still be checked for the pump and hose model.

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