Selector valves for swimming pools

A pool selector valve is the component that directs the water flow path within the filtration system.

It is mainly used in sand filters to select different equipment functions, such as filtration, washing, rinsing, recirculation, or draining.

The available positions and connections depend on the valve model and the filter it is used with.

The safest way to choose a compatible selector valve is to identify the brand, model, and reference number of the filter or original valve.

You should also check the connection diameter, mounting position, number of ways, and arrangement of the inlets and outlets.

Two valves with a similar appearance may use different connections or configurations and may not be interchangeable.

The main difference is the valve's mounting position relative to the filter.

Top-mounted valves are installed directly on the top of the filter, while side-mounted valves are installed on one side using specific connections.

The required type depends on the filter design and cannot be chosen solely by preference.

A 6-way selector valve has different positions for changing the water flow path within the system.

It usually includes functions such as filtration, washing, rinsing, recirculation, draining, and closed.

The exact name and functions may vary by manufacturer, so you should always check the markings and the model manual.

The filtration position is used during normal pool operation.

Water pumped through the filter medium then returns to the pool.

The exact flow path depends on the filter and selector valve design.

The filter or backwash position changes the water flow path to clean the filter medium.

During this operation, some of the accumulated dirt is loosened and normally discharged through the drain.

The duration and frequency of backwashing should be adjusted according to the manufacturer's instructions and the condition of the filter.

The rinse function is normally used after backwashing.

It allows the filter medium to be repositioned and some of the waste to be discharged before using the filter position again.

Not all valves have this function, so you should check the positions available on your model.

In the recirculate position, the water returns to the pool without passing through the filter medium.

It can be used during certain maintenance operations or specific water treatments.

It should only be used when required by the procedure being carried out.

The waste position allows water to be sent directly to the drain without passing through the filter medium.

It can be used to lower the water level or during certain cleaning operations.

Always check that the drainage system can properly discharge the resulting flow.

As a general rule, you must stop the pump before changing the position of the multiport valve.

Moving the handle while the system is operating can subject the internal mechanism and hydraulic circuit to unnecessary stress.

Always follow the specific procedure indicated by the valve manufacturer.

If water flows to the drain while in the filter position, there may be wear, dirt, or deterioration in the valve's internal sealing system.

It is also advisable to check that the handle is correctly positioned and that the internal seals are in good condition.

In many models, it is possible to replace the seal or internal assembly without replacing the entire valve.

A leak may be caused by deteriorated seals, fittings, the cover, joints, the valve body, or wear of internal components.

The exact location of the leak helps determine which part needs to be inspected or replaced.

Before replacing the entire valve, check whether a compatible specific spare part is available.

A handle that offers too much resistance may indicate dirt, wear, deteriorated seals, or problems with the internal mechanism.

It is not advisable to force it, as this may damage the handle or internal components.

Before carrying out any disassembly, stop the pump and properly release the system pressure.

Many pool selector valves have specific spare parts available.

Depending on the model, seals, handles, covers, springs, sight glasses, distributors, or other internal components may be replaced.

If the main body is cracked or has significant damage, it may be necessary to replace the entire valve.

Only when there is actual compatibility between both valves.

You should check the dimensions, diameter and arrangement of the connections, mounting position, and compatibility with the filter.

The fact that two valves have the same nominal diameter does not necessarily mean that they are interchangeable.

Check the filter brand and model, original reference, mounting position, connection diameter, and number of ports.

It is also important to check the arrangement of the connections to the pump, filter, return, and drain.

If you are replacing an existing valve, always use the original reference whenever possible to confirm compatibility.

Always stop the pump before changing the position, and avoid forcing the handle.

Periodically inspect seals, cover, connections, and possible leaks.

During winterization, follow the manufacturer's instructions to protect the valve from frost and extended periods of inactivity.