SEAFLO 42-Series Water Pump w/Variable Flow


The SEAFLO 42-Series Water Pump w/Variable Flow pump features industry standard fittings, wiring, and mounting base to directly replace similar competing pumps. The three-chamber high volume design is driven by a heavy-duty motor which produces flow rates of 3.0 GPM and 55 PSI.

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Meet SEAFLO’s newest addition to it’s diaphragm pumps: the 42 series. UL 778 & CSA 22.2 certified. It retains the raw power and pressure of its predecessors, but also can adapt to situations where huge flow is not needed. Compact but capable, it is a great fit for tight spaces. It may also be configured with different inlet types, each with their own unique fittings to be sure that it fits any application you can require. It also features an internal bypass to reduce pump cycling.

No accumulator tank needed! SEAFLO’s 42-Series will perform optimally under both high flow and low flow. It also features self-priming and priming up to 6 vertical feet while operating quietly during any application.

This pump is capable of running dry and even contains a built-in check valve. Lastly, as with all SEAFLO products, it comes with a 4-Year Limited Warranty!


  • Voltage: 12V DC
  • Flow Capacity: 3.0 GPM
  • PSI Cutoff: 55 PSI
  • Self Priming: 6 FT
  • Amp Draw: Max 7.0 A
  • Valves: Viton
  • Diaphragm: Santropene
  • Inlet/Outlet: 1/2″ Threaded MNPT

Prepping the area in our 1973 GMC Motorhome prior to removing the old Shurflo Water Pump and installing the SEAFLO 42-Series replacement.

Photos of the final installation with the SEAFLO water pump to come.


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