ST1½ and ST40 Metallic 1½" (40 mm) AODD – Containment-Duty Pump


    For more than 55 years, manufacturers across multiple industries that involve hazardous materials have trusted SANDPIPER to protect people, equipment, the environment and the material being pumped.

    The SANDPIPER 1½", metallic AODD pump provides unsurpassed fluid containment in the event a diaphragm is breached. This leak-free pump is designed to be driven by compressed air or nitrogen.

    Containment Pump Anatomy

    Why Use Containment-Duty Pumps?

    Environmental concerns: When fluids (like those listed below) escape to the environment, significant time and effort is required on clean up and material recovery. Additionally, the costs of downtime, lost production, manpower, equipment replacement, disposal fees and fines can be excessive. Preventing leaks when handling these substances provides a more efficient operation and avoids the damaging effects of environmental and human exposure to these toxic fluids.

    • Paints, inks and coatings
    • Adhesives and resins
    • Chemicals and petrochemicals
    • Oils and hydrocarbons
    • Acids, caustics and corrosives
    • Plastics and polymers
    • Contaminated water and wastewater
    • Pesticides and herbicides
    • Fertilizers
    • Preservatives
    • Mercury
    • Phthalates

    High cost of lost fluid: When fluids (like those listed below) escape to the environment, the cost of losing them is significant. Lost fluid means lost profit.

    • Drugs and pharmaceuticals
    • Foods
    • Cyanotic-based paints
    • Precious metal-based fluids
    • Cosmetics
    • Perfumes
    • Printer inks
    • Beer and alcohol
    • Blood
    • Creams and lotions

    Fluids that need to be contained: Even non-toxic fluids, like clean water, can create hazards, annoyances and safety concerns if people are in or around the area surrounding a pump when a diaphragm fails. When dealing with toxic and hazardous fluids, the need to contain leaks goes from a nuisance to a critical safety need.

    Why use Containment-duty pumps

    ST1½ Metallic Containment-Duty Pump Features

    • Leak detection: All containment-duty pumps are designed to accommodate visual, mechanical and electronic leak detection devices.
    • Durability: The durable, bolted construction of the ST1½ is superior to the clamped-band construction pump, providing exceptional leak-free performance.
    • Serviceability: The air distribution system (ADS) is one of the most frequently serviced parts of any AODD pump. Only SANDPIPER's ESADS+ feature allows access to the complete ADS without removing the pump from service. Repair or clean in five minutes (versus 55 minutes for competitors). Additionally, the ST1½ offers air-side interchangeability with SANDPIPER’s 1½" (HDB 1½) for reduced inventory costs.
    • Trusted design: SANDPIPER’s original ADS is fully interchangeable, repairable and inline-serviceable. Other manufacturers frequently change ADS designs, creating issues with interchangeability, obsolete inventory and increased cost of ownership.

    Containment Duty Advantage

    Performance Guarantees

    Chemical Compatibility Guide

    To determine chemical compatibility with this pump, please refer to our Chemical Compatibility Guide. Material of construction options include: aluminum, stainless steel and Alloy C, with elastomer TPE (thermal plastic elastomers) and PTFE options in diaphragms and check valves.

    CE logo ATEX ABS logo EAC ISO Logo


    Port Size

    1½" NPT
    1½" BSP (Tapered)
    Capacity 0 to 106 gpm (400 lpm)
    Air Distribution Valve No-lube, no-stall design
    Solids-Handling Up to ¼" (6.3 mm)
    Heads Up To 125 psi or 289 ft. of water (8.6 bar or 88 meters)
    Displacement/Stroke .37 gallons (1.29 liters)
    Max Operating Pressure 125 psi (8.6 bar)
    Shipping Weight
    Cast Iron
    Stainless Steel

    99 lbs (46 kg)
    146 lbs (66 kg)
    212 lbs (95 kg)






    ST1 & ST40 CAD Files

    SANDPIPER can provide you with a CAD file to save time and improve the quality of your final design, as well as reduce measurement and documentation packet errors. Contact us today to request yours.


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