Shurflo Water Pumps for RVs & Boats
Shurflo 12V diaphragm pumps are the standard fresh water pump in a great many RVs, and the same company makes washdown, livewell, bilge and ballast pumps for boats. Each listing carries the Shurflo model number so you can match a replacement.
Replacing an RV water pump
Match the flow rate (GPM), the pressure switch setting and the port size of the pump you are replacing, and check that the wiring and fuse suit the new pump's current draw. An accumulator tank smooths the flow and stops the pump cycling on and off at a slightly open tap. More: RV water and plumbing, the RV water system kit and marine plumbing and pumps.
Which Shurflo pump do most RVs use?
The 4008 Revolution at 3.0 GPM is the common factory-fit size. Check the label on your old pump for its model number and flow before ordering.
Why does my water pump keep cycling?
Short cycling usually means a small leak, a dripping tap or a toilet valve that is not sealing. If the plumbing is tight, an accumulator tank will reduce cycling at low flow.
Do I need a strainer?
Yes. A strainer on the inlet keeps debris from the tank out of the pump's valves, which is the most common cause of a pump losing pressure.
What is the difference between the Shurflo 4008 and 4048?
Both are 12V RV fresh water pumps with a 55 PSI shut-off. The Revolution 4008-101-A65 delivers 3.0 GPM and draws up to 7.5 amps. The Shurflo 4048-153-E75 high flow pump delivers 4.0 GPM and draws up to 10 amps, so check the wiring and fuse before moving up.
Which Shurflo washdown pump should I choose?
The Blaster II 4238-121-E07 is rated 3.5 GPM with a 45 PSI shut-off. The Pro Blaster II shuts off at 60 PSI: the Deluxe 4248-153-E09 delivers 4.0 GPM and the Ultimate 4258-153-E09 delivers 5.0 GPM. The 4348-153-E09 and 4358-153-E09 are the 4.0 and 5.0 GPM washdown kits.
Which Shurflo fresh water pump is made for boats?
The Aqua King II line. The Aqua King II Premium 4148-153-E75 is a 12V, 4.0 GPM pump with a 55 PSI shut-off, designed for boats with several fixtures. The Aqua King II Junior 4128-110-E04 is the 2.0 GPM, 30 PSI model.
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