What types of construction pumps does DHS Equipment carry parts for?
DHS Equipment stocks parts for three main types of construction pumps: trash pumps, diaphragm pumps, and submersible pumps. Trash pumps (like the Wacker PT2, PT3, and PT4 and Multiquip QP3 and QP4) are self-priming centrifugal pumps used to move large volumes of water containing solids on dewatering jobs. Diaphragm pumps (like the Wacker PDI and PDT series) use a flexible membrane to move fluid and are well-suited for sludge, mud, and abrasive materials. Submersible pumps (like the Multiquip ST series) are designed to operate fully submerged for pit and trench dewatering. We carry parts for all three across Wacker Neuson, Honda, and Multiquip brands.
What are the most commonly replaced parts on a trash pump?
The parts that wear most frequently on a trash pump are the mechanical seal, impeller, flapper valves, and O-rings. The mechanical seal prevents water from leaking along the pump shaft and is often the first component to fail, especially if the pump runs dry. Impellers can wear or crack when handling abrasive material. Flapper valves deteriorate over time and affect priming. O-rings at the volute, cover, and impeller are inexpensive but critical to keeping the pump sealed and operating efficiently. DHS Equipment stocks all of these individually as well as in complete overhaul kits for popular Wacker Neuson, Honda, and Multiquip models.
What is a pump overhaul kit and when should I use one?
A pump overhaul kit bundles the most commonly replaced internal components—typically the mechanical seal, O-rings, gaskets, and sometimes the impeller or flapper valve—into a single package. They're the most cost-effective way to restore pump performance after heavy use or when the pump starts losing prime, leaking, or running rough. Rather than diagnosing and ordering parts one at a time, an overhaul kit lets you rebuild the wet end in one service session. DHS Equipment carries overhaul and seal kits for the Wacker Neuson PT3A trash pump.
OEM vs. aftermarket pump parts—which should I choose?
OEM parts are manufactured to the original equipment specifications and are the safest choice for critical components like mechanical seals and impellers, where fit and material tolerances directly affect pump performance and seal life. Aftermarket parts are produced by third-party manufacturers at a lower price point and can be a smart option for wear items like O-rings, gaskets, shockmounts, and hose fittings where cost savings matter more. DHS Equipment offers both options, so you can choose OEM for the components where it counts and aftermarket where budget is the priority—without compromising equipment uptime.
Why does my trash pump lose prime and how do I fix it?
Lost prime is one of the most common trash pump complaints on the job site. The most frequent causes are a worn or failed mechanical seal, a cracked or deteriorated flapper valve, a loose or missing priming plug, a damaged volute O-ring, or a suction hose with an air leak. Start by inspecting the priming plug and O-rings for obvious damage, then check the flapper valve condition. If the pump primes briefly but loses suction quickly, a failing mechanical seal is often the culprit. DHS Equipment stocks all the parts needed to diagnose and fix priming issues, including complete seal kits and overhaul packages. For help identifying the right part for your model, contact us at [email protected] or call 866-611-9369.