One of the best ways to gauge a pump is by its pressure. Pressure determines the horizontal or vertical pumping distance. Trailer pumps are workhorses in the concrete industry, quietly doing their job with little fanfare and less exposure than their boom pump brothers. However, trailer pumps can be extremely varied.

There are pumps designed for specific types of mixes: low slump, large aggregates (usually up to 1.5 inches). Many of these pumps also have the S valve technology common on boom pumps. Some units are combined with mixers for added convenience. They are perfect for shotcreting and grouting. There are trailer pumps for almost any occasion. If you would like information on any the following pumps, circle the corresponding reader service number.

Pump with twice the horsepower

With up to twice the horsepower of other pumps of similar output, the Powercreter Elite 30 is designed specifically for midrange, mid-application shotcrete and concrete applications. It features a swing-tube design that provides smooth concrete flow and fast switchover to minimize surge and pulsation. The pump is ideal for construction projects such as foundations and pools, pressure grouting, and rockscaping. Allentown Equipment, 800-553-3414, www.allentowneuquipment.com. Circle 16.

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Durable concrete pumps

The Mayco LS series of concrete pumps (LS40, LS50TD, and LS60TD) features vertical and horizontal pumping distances of up to 300 and 1200 feet, respectively. All three pumps are equipped with a hopper remixer, a 10-cubic-foot hopper capacity, hydraulic oil cooler, and 6x36-inch concrete cylinders. Other features include high velocity heat exchangers to cool the hydraulics, extra-strength grates with reinforced splash covers, 40-gallon fuel tanks, and potted solid-state circuitry that eliminates vibration and improves durability. Multiquip, 800-421-1244, www.multiquip.com. Circle 17.

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Low-volume, high-pressure pump

The Pro-Cretor is a low-volume, high-pressure concrete pump/mixer designed for a number of applications, including shotcreting, pressure grouting, refractory work, and concrete repair. Powered by a 30-hp Deutz engine, it has an output up to 6 cubic yards per hour with a maximum pump pressure of 1300 psi. The unit also can handle aggregate up to 3/4 inch. Other features include a 32-gallon hydraulic tank, and a hopper capacity of 11 cubic feet. Airplaco Equipment Co., 888-349-2950, www.airplaco.com. Circle 18.

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Pump for low-slump mixes

The Alpha hydraulic pea-rock pump is designed for harsher, lower slump mixes. The unit features a direct-flow, cast steel S-tube, and comes in three models, rated at 10, 20, and 25 cubic yards per hour. The dual-circuit hydraulic components are housed in a unique monoblock hydraulic brain, eliminating 60% of the hydraulic hoses found in most concrete pumps. The directional valves, relief and unloader valves, and stop, start, and reverse functions are all contained in a one-piece manifold. Transcrete America, 866-662-3500, www.transcreteamerica.com. Circle 19.

Pump with a long reach

Specifically designed for shotcreting, the Katt-Kreter pump provides operators with both high volume and high pressure. Output can reach up to 50 cubic yards per hour up to 1100 psi. With a 131-hp turbocharged diesel engine, it has enough power to pump 1200 feet horizontally and 400 feet vertically. Its twin-shifting cylinders provide smooth pumping, with reduced line surges.