Lincoln® 1/4" Polypropylene Diaphragm Pump

Diaphragm pumps are driven by compressed air. The directional air distribution valve and pilot valve - the "air end" - are located in the center section of the pump. Liquid moves through two manifolds and outer chambers of the pump - the "wet end".

Generally, check valves are located at the top and bottom of each outer chamber or on a common manifold. The two outer chambers are connected by suction and discharge manifolds. Lincoln's double diaphragm self-priming design offers many advances over other pumps.

For use with new oil and antifreeze:

• Pumps Viscous Materials
• Environmentally Friendly
• Runs Dry without Damage

Return Policy

You can return unused or defective products up to 30 days from the date of order.  Some product returns may be subject to restocking fees.  Proof of Purchase will be required if we cannot verify your order information.  Unless the product is defective or damaged in transit, the customer is responsible for return shipment costs.

Defective or Damaged Products

All shipments received must be immediately inspected for damage.  If your order shipped on a freight carrier, any damage needs to be noted on the Freight Receipt before signing for the delivery.  An exchange or refund will be provided at no additional cost.  If damage is due to misuse or regular wear of the product, the return will be denied.

Order Cancellation

If you need to cancel your order for any reason, please contact us immediately.  If the order is canceled prior to shipping, you will be refunded in full.  Certain products that are manufactured to order cannot be canceled after the manufacturing process has started.