3” full port manifold flange high flow polypropylene pump, impeller and wear plate (M350) - NEW!

Price: $1,936.95
190.00 LBS


3 full port manifold flange polypropylene pump, impeller and wear plate. Mounts to standard 1” keyway “Q” shaft engines, bearing pedestals, hydraulic pedestals or our Baldor motors. Features include:

 Up to 500gpm using 4" flooded suction
 Series 300 manifold flange suction and discharge
 Max 25’ suction lift. A foot valve is recommended to help keep prime
 Internally bypassing at roughly 60PSI so it won’t blow a hose apart
 Priming plug to purge all air from pump bowl to ensure seal longevity
 Drain plug for easy winterization
 Flanged suction & discharge to enable ease of removal in hard pipe installations
 Self-priming with suction flapper to maintain pump prime in most installations
 3-year warranty on Honda engines. More info available under Warranty tab
 1-year warranty on Baldor motors. More info available under Warranty tab
 1-year warranty on pump defects. Leaking seal, or damage due to misuse is not covered under warranty.


 Not for pumping gasoline, diesel, kerosene, aviation fuels, or any other combustible or flammable liquid. For pumps suitable for refueling, please see our fuel pump section of the website.
 Do not run pump dry. Wet seal pumps available under our DWS line.
 Pump suction must be the same size or larger than the discharge! If discharging 1-1/2”, you must use 1-1/2” or 2” suction. Failure to follow proper pipe sizing will result in cavitation, which will lead to pump failure and is not covered under warranty.
 Minimum GX-390 Honda or equivalent.


Plumbing tips:

 To maximize your pump’s capability, use as few 90° elbows as possible. This is especially important on the suction side of the pump.
 These self-priming pumps are designed to provide high flow, but they like to push water, rather than pull it. You can maximize your pump’s performance by keeping the suction line as short, and as straight, as possible.
 90° elbows are unavoidable. However, we highly suggest using long sweep elbows instead of hard 90° elbows.
 Here’s an example of how badly 90° elbows can affect your flow. In 3” line, every 90° elbow is equivalent to adding an extra 11’ of line. A sweep elbow, however, adds about 8’. A 45° elbow adds 4’ of line. So, if you add 5 90° elbows, you’ve added 55’ to the suction line. By adding that many elbows, you drastically reduce the pump’s efficiency.
 If you have to have numerous elbows, it is recommended you increase your suction line by one pipe size (from 2” to 3”, or from 3” to 4”). Also, be sure to run full port valves and tank fittings. Any restrictions in the suction line will hamper performance. You can only flow as fast as your smallest restriction.
 Most self-priming pumps are designed as internally bypassing, meaning a discharge bypass is not needed. However, it is recommended that you avoid slamming the discharge valve shut, as this can cause a water hammer effect, which can result in seal failure.

Pump is available with these variants:

M350POW:3” polypropylene pump only with wet seal. Unit ships without anti-freeze; be sure to add prior to use! Pump easily attaches to engine. Bolt on, tighten impeller clamp, and remove shim.

M350-13HES:3” polypropylene pump with GX-390 electric start Honda with recoil backup, mounted on a base plate. Stainless fasteners and quality anti-seize used in assembly. Extra horsepower helps when pumping heavier liquid, when using longer discharge, or when bottom filling and fighting head pressure.