Plumbing & Water · My build kit

Shurflo 4008 Pump: Planning Space for My Water Kit

I bought the Shurflo Revolution 4008 among my water-system components. My interior plan put the shower drain and three tank openings ahead of the framing, flooring and wall panels.

By · Camper Van Freedom

View Shurflo 4008 pump on AmazonSee my build photos ↓

What Matters for This Job

  • My purchase is a separate twelve-volt diaphragm pump.
  • The build notes put body openings before finished interior layers.
  • Compare separate pumps with a pump-and-accumulator assembly.

The Build Behind This Item

I used SketchUp while working out the order of the interior jobs. My notes specifically included the shower drain and the openings for three water tanks in the work to do while the body metal remained accessible.

The cleanup photographs show the bare-floor stage behind that plan. The Shurflo purchase adds a motor, pump head, mounting feet and hose connections to the equipment layout being considered alongside those tank and drain positions.

The cargo floor during my preparation session before sound deadening.
The cargo floor during my preparation session before sound deadening.

Pump Layout Alongside the Planned Tanks

  1. I used SketchUp to plan the interior and put body openings ahead of the framing, floor and wall panels.
  2. My Interior Preparation notes included the shower drain and openings for three water tanks in that preparation sequence.
  3. I removed cargo tie-down hardware for later framing mounts and door trim for the later insulation and paneling.
Removing stuck-on residue during the floor cleanup.
Removing stuck-on residue during the floor cleanup.

My Takeaway for Choosing the Kit

I would compare the complete arrangement of the components in the space available. Shurflo 4008 and the Flojet alternative are separate pumps; the SEAFLO option groups a pump and accumulator on one base. That packaging difference changes what has to be positioned together and what can occupy separate locations in the water-system layout.

Product Details And Van-Build Uses

SpecificationProduct Detail
Purchased Model4008-101-E65
Supply12V DC
Nominal Flow3 GPM
Manufacturer Shut-Off Pressure55 PSI

The Revolution 4008 is a pressure-controlled RV water pump. Pentair lists the 4008-101-E65 with a 3 GPM nominal flow and 55 PSI shut-off pressure, while the installation manual explains the by-pass design and service layout. The manual calls for flexible connections and an accessible inlet strainer, useful details before a van cabinet closes around the water equipment. It also includes troubleshooting for priming, cycling and shut-off behavior. This pump family does not require an accumulator for normal by-pass operation. That makes the pump manual a separate reference from any accumulator purchased for another plumbing arrangement.

Manufacturer Product Reference

Download SHURFLO 4008 Installation And Operation Manual (PDF)

SHURFLO 255-313 Inlet Strainer

SEAFLO Accumulator Reference

Does The 4008 By-Pass Pump Require An Accumulator?

Pentair’s 4008 installation manual states that an accumulator is not needed for the by-pass pump.

Alternative products

Two Alternatives to Compare

The SEAFLO assembly combines a pump and accumulator on one base. Flojet offers a separate compact pump, so the comparison includes whether the accumulator is integrated into the assembly or positioned elsewhere.

ProductWhy compare this optionPurchase link
Shurflo Revolution 4008 Water PumpPurchased separate twelve-volt pump with mounting feet and hose connections.View Shurflo 4008 pump on Amazon
SEAFLO Pump-and-Accumulator Assembly (alternative)Pump and accumulator grouped on a single base.View on Amazon
Flojet Triplex Water-System Pump (alternative)Another separate compact twelve-volt diaphragm pump.View on Amazon
SEAFLO Pump-and-Accumulator Assembly

SEAFLO Pump-and-Accumulator Assembly

This assembly combines a twelve-volt water pump and compact accumulator. A shared base keeps the main components together in one mounting arrangement.

View on Amazon
Flojet Triplex Water-System Pump

Flojet Triplex Water-System Pump

This twelve-volt diaphragm pump combines an electric motor with an automatic pump head. Mounting feet support the assembly beneath the water connections.

View on Amazon

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