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REICH Tandem 515-1914121R wiring diagram
12 V, 55 W submersible pump rated 19 L/min and 1.4 bar. Nominal current is calculated as 55 W / 12 V; startup current and supply-fuse rating remain unverified. Generic REICH pump instructions limit supply to 14 V: confirm the installed variant before using a higher charging-voltage bus.
- Nominal voltage
- 12 V
- Compatible systems
- 12 V
- Rated power
- 55 W
Wiring diagram
How the Tandem 19L/min is wired.
Open this example in Crimp to use your own parts and cable lengths. Review the assumptions and installation notes as you adapt the circuit.
Cable sizing for this example
Use the diagram as a starting point for your installation. Replace the example equipment and cable lengths with your own, and check the connections against your exact model's instructions.
3 m one way
12 V system
- Wire
- 1.5 mm² · 16 AWG
- Example fuse
- 7.5 A
- Design current
- 4.6 A
- Voltage drop
- 2.7%
Sized against ABYC E-11. The design current is the part's continuous draw. The length is one way; voltage drop includes an equal-length return.
Run-length and manufacturer assumptions
The editable example uses 3.048 m (10 ft) runs unless a shorter run is stated. Metric overviews round these to 3 m. Adapt the parts and lengths to your installation before choosing cable and protection.
Supporting parts
- 6.1 m total of 1.5 mm² (16 AWG) marine cable
- Terminations for 1.5 mm² cable, matched to the equipment's screw terminals, leads or studs
- 7.5 A fuse and holder on the positive run
- Heat-shrink, strain relief and terminal boots sized to the cable
Check stud sizes, fuse type, run length and how warm the space gets against the gear you actually have before you order.
Installation notes
Before you install.
Open a question for model-specific guidance and sources.
Reviewed against manufacturer family documentation (rev. REICH generic submersible pump operating instruction; exact Tandem product page), checked 2026-10-01. Exact variant details still require confirmation. Manufacturer documentation →
Which Tandem pump is represented?
The REICH product listing identifies 515-1914121R as a 12 V, 55 W Tandem pump with 19 L/min maximum flow and 1.4 bar maximum pressure, a 1 m cable and an 80 mm minimum tank opening. Flow and pressure maxima do not imply both occur simultaneously at the tap. The catalog calculates nominal input current as 55 W / 12 V, approximately 4.58 A; startup current remains unpublished.
The downloaded REICH operating instruction is a manufacturer-authored, generic submersible-pump sheet. It does not name 515-1914121R, so model-specific installation requirements still need checking against the supplied pump documentation.
How should it be wired and switched?
The family instruction identifies brown as positive and blue as negative. Reversed polarity can still produce water flow, but with reduced performance, so pumping is not proof of correct wiring. The pump can be controlled by a tap switch, pressure switch or push-button arrangement. Match the switching equipment to the real motor load and starting demand; use an intermediate relay where the selected control requires one.
Neither the exact product page nor the reviewed family sheet gives a supply-fuse rating or a startup/stall current. Do not treat 55 W as a complete motor-circuit design. The catalog's nominal current envelope is calculated, not a tested surge or a connector rating.
What supply-voltage limit needs resolving?
The family sheet states 12 V DC and no more than 14 V. Many vehicle charging systems exceed 14 V, so confirm the applicable limit for the delivered 515-1914121R before connecting it directly to that bus. This older generic instruction is a reason to verify the installation, not evidence that every current Tandem variant tolerates a higher charging voltage.
How should the water installation be maintained?
Keep the pump submerged during use, with its intake clear of debris and its cable protected at the tank entry. The seal may tolerate a brief dry interval, but extended dry running is not permitted normal operation. If flow falls, inspect intake contamination, the hose and tap restrictions, trapped air, polarity and supply voltage under load. Remove and drain the pump when freezing is possible; draining only the tap can leave water inside the pump. The family sheet describes cleaning and an intake filter as ways to reduce debris-related faults.
Technical reference
Specifications and terminal map.
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Catalog specification
12 V, 55 W submersible pump rated 19 L/min and 1.4 bar. Nominal current is calculated as 55 W / 12 V; startup current and supply-fuse rating remain unverified. Generic REICH pump instructions limit supply to 14 V: confirm the installed variant before using a higher charging-voltage bus.
- Nominal voltage
- 12 V
- Compatible systems
- 12 V
- Rated power
- 55 W
- Continuous draw
- 4.6 A
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
+
positive · input
−
negative · input
Sources and sizing method
Equipment specifications. Model details, ratings and terminal roles come from the catalog. Check your unit’s label and current manufacturer documentation for its exact revision.
Example sizing. Sized against ABYC E-11. Boats built to UK or EU rules answer to ISO 13297 — check these figures against it before you build. Results use the example current and run length shown above. Set your actual equipment, lengths and installation conditions in Crimp before choosing hardware.
Read how the sizing worksNext step
Plan your installation with Tandem 19L/min.
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