Zodiac 4-wire male power connector – R0737900

Zodiac 4-wire male power connector R0737900

The Zodiac 4-wire male power connector R0737900 is the original low voltage plug used to connect the cell power cable to the control electronics on selected Zodiac salt chlorinators. Supplied as a compact 4-pole connector, it restores a secure, factory specification connection whenever the original plug is worn, damaged or lost.

Main features of the Zodiac 4-wire power connector

• Original Zodiac 4-wire male connector for salt chlorinator power circuits.
• Four contacts for separate low voltage cell power and signal conductors.
• Compact design that fits directly in the dedicated control unit socket or harness.
• Plastic housing and metal pins suitable for humid technical environments.

Compatibility with Zodiac salt chlorinators

The R0737900 4-wire male connector is used on several Zodiac salt chlorination platforms as the plug between the power cable and the control unit. It appears in the spare parts lists as “conector macho alimentación 4 cables” with reference R0737900.

• Compatible with Zodiac Ei salt chlorinators (Ei 10, Ei 18, Ei 25).
• Used on Zodiac Tri and Tri Expert control units.
• Also fitted on Zodiac Tri Expert LS and Hydroxinator MagnaPool models that use the same 4-wire connection.
• Often supplied as a pack of two connectors for service and future replacements.

If the parts diagram for your chlorinator identifies R0737900 as the 4-wire power connector, this is the correct male plug to pair with the existing cable and control unit socket.

Function and typical symptoms of wear

This 4-wire plug is part of the low voltage power path between the control unit and the cell. Reliable contact in each pin is essential for stable chlorine production and for correct monitoring of the cell.

• Transmits low voltage power from the electronic board to the cell electrode.
• Ensures each conductor is held securely with separate, insulated contacts.
• Supports easy disconnection of the cable when servicing the cell or electronics.

With time, repeated plugging, mechanical stress and corrosion can affect the connector:

• Intermittent cell errors or power loss when the cable or plug is moved.
• Visible oxidation or discolouration on the metal pins.
• Housing that is cracked, deformed or no longer locks into the mating socket.

When to replace the Zodiac R0737900 connector

Replacing the male connector is recommended whenever there are contact problems or visible damage to the plug, especially if cell and cable checks do not resolve the fault.

• Replace a connector with bent, loose or heavily corroded pins.
• Install a new plug if the plastic body is broken or no longer grips the mating socket.
• Fit a fresh connector when rewiring or shortening a worn power cable.

Using the original Zodiac R0737900 plug ensures that the geometry and pin layout match the control unit, reducing the risk of wiring errors or poor contact compared with generic connectors.

Installation guidelines

Installing the Zodiac 4-wire male power connector R0737900 involves basic low voltage wiring and should only be done with the chlorinator disconnected from the mains. If you are not confident with electrical work, this task should be carried out by a qualified technician.

• Disconnect the chlorinator from the mains and confirm that the control unit is fully de energised.
• Note or photograph the existing wiring to the old connector, including conductor colours and positions.
• Cut away the damaged plug if necessary and strip the cable ends according to the connector specifications.
• Connect each wire to the corresponding terminal on the new R0737900 connector, tightening firmly.
• Check that no bare conductor is exposed and that strain relief, if provided, grips the cable jacket.
• Insert the plug into the control unit socket and ensure it seats fully without excessive force.

After reassembly, restore power to the chlorinator and verify that the cell powers up correctly, with no intermittent errors when gently moving the cable near the connector.

Care and good practice

Careful handling of the power cable and connector helps keep the R0737900 plug in good condition over many seasons.

• Always unplug by holding the connector body rather than pulling on the cable.
• Keep the plug and mating socket dry and protected from direct splashes.
• Avoid sharp bends or tension on the cable close to the connector.
• Inspect the plug and socket periodically for signs of corrosion or overheating.

With a correctly wired Zodiac 4-wire male power connector R0737900 and a sound power cable, compatible Ei, Tri, Tri Expert, Tri Expert LS and Hydroxinator systems maintain a stable, low voltage supply to the cell for reliable salt chlorination.