SHURflo 4048 12V 4 GPM fresh-water pump
Part number: 4048-153-E75
View productSHURflo 4048 High-Flow Pump Parts — Exploded Diagram
SHURflo's 4048-153-E75 is a 12V RV fresh-water pump rated at 4 GPM and a 55 PSI pressure-switch shutoff. It has a four-chamber diaphragm and internal bypass for multiple water fixtures. When repairing it, match the complete 4048-153 model rather than assuming a similarly named 4008 Revolution component will fit.
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4048-153 factory specifications
| Specification | 4048-153-E75 aftermarket model |
|---|---|
| OEM counterpart | 4048-153-A75 |
| Electrical supply | 12V DC; manufacturer-recommended 15A fuse |
| Flow rating | 4.0 GPM open flow |
| Pressure-switch shutoff | 55 PSI |
| Plumbing ports | ½-inch-14 NPSM male |
| Self-priming | Up to 6 vertical feet under factory test conditions |
| Overall dimensions | 10.3 × 4.9 × 4.8 inches |
Identify the original 4048 repair-kit numbers
| Diagram callout | SHURflo part number | Component |
|---|---|---|
| 1 | 94-801-05 | Pressure-switch assembly |
| 1 + 2 | 94-801-01 | Upper assembly, including the pressure-switch components |
| 3 | 94-800-01 | Valve assembly |
| 4 | 94-801-02 | Four-chamber diaphragm drive assembly |
| 5 | 94-71-001-07 | Motor |
| 1–4 | 94-801-04 | Complete pump-head kit |
| Not shown | 94-800-03 | One-way check valve |
A 94-801-04 pump-head kit is different from the 94-800-04 head used on SHURflo's 4008 Revolution pump. The numbers in the table are original manufacturer part identifiers; only components with confirmed exact store listings are linked for purchase.
1 — Pressure switch
Starts and stops the pump as plumbing demand changes.
2 — Upper housing
Contains the threaded water connections and seals to the internal valve components.
3 — Valve assembly
Directs water through the four pump chambers.
4 — Drive diaphragm
Provides the pumping motion driven by the motor.
5 — Motor
12V DC motor driving the pump mechanism.
Before servicing a 4048
- Check that the pump label states 4048-153-A75 or 4048-153-E75.
- Shut off 12V power and release water pressure before disconnecting a fitting or pump part.
- Use the manufacturer's exploded diagram to locate the failed assembly and confirm replacement-kit availability.
- Install the replacement following its instructions; check the port seals, strainer, fuse and pump operation before returning the system to service.
SHURflo 4048 high-flow pump exploded diagram
Open the full-size manufacturer diagram (PDF) if the embedded view does not open on your device.
4048-153 factory data sheet details the pressure-switch and repair numbers. The SHURflo 4048 installation and service manual provides wiring, pressure and installation instructions.
For other pumps, compare our 4008 Revolution repair-parts guide or the 2088 / 2093 pump repair guide.
Complete pump and exact replacement parts
SHURflo 4048 upper housing assembly
Part number: 94-801-01
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SHURflo 4048 one-way check valve
Part number: 94-800-03
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