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Owning a swimming pool is a privilege, but swimming pool maintenance is a great deal of work. Understanding the different functions of a pool filter and the valve that is attached to it helps pool owners keep their water clean and fill their pools with clean, clear water. Understanding how to use a multiport valve on a pool filter is essential, and this article will provide some helpful tips.

What is a Multiport Valve?

A multiport valve is a key component of a pool filter system. This valve’s function is to help regulate the flow of water into and out of the filter to ensure optimal filter performance. It is a large, round valve with multiple functioning ports and settings, which allows pool owners to select certain functions based on the status of the pool filter.

Types of Settings on a Multiport Valve

The multiport valve comes preset with several settings, depending upon the manufacturer. This valve typically operates with six settings: Filter, Waste, Recirculate, Closed, Backwash, and Rinse.


Setting the valve to Filter allows water to pass through the filter, removing debris and dirt. This is the normal running position for the valve, and most of the time, it will be set on this setting.


The Waste setting ensures that water is not filtered but instead, is sent out through the backwash line and flushed away. This is helpful for those times when the water levels are low, and pool owners need to fill the pool quickly. It is also used when the filter is clogged and needs flushing to restore water flow.


The Recirculate setting sends water directly back into the pool to quickly increase its temperature. It also bypasses the filter, allowing pool owners to keep the filter running and clean while the water stays warm.


The Closed setting stops water from entering the pool filter, thereby keeping the water in the pool from being filtered. This is helpful for those times when the filter needs to be checked or the filter media replaced.


The Backwash setting allows pool owners to flush out the filter to restore water flow and filter efficiency. This setting reverses the flow of water in the filter, sending the dirty water out through the backwash line. When done, it is important to switch back to the Filter setting.


The Rinse setting is used after backwashing to rid the filter of dirt and debris. This setting should be used for just a short period of time, several seconds to a minute, and then switched back to the Filter setting.

People Also Ask

1. How often should I backwash my pool filter?

It is recommended that pool owners backwash their pool filter about once a month or whenever the filter pressure increases more than five to seven pounds.

2. Is it necessary to use a multiport valve on a pool filter?

Yes, the multiport valve is essential for proper operation of a pool filter. It allows for settings such as filter, closed, waste, and rinse, which are necessary for the performance of the filter.

3. What settings should I use for my pool filter?

For most of the time, the multiport valve should be set to the filter setting to filter the water entering the pool. When the filter needs cleaning, it should be switched to the backwash setting and then rinsed. Finally, it should be switched back to the filter setting.

4. Can I use the waste setting to fill my pool?

Yes, the waste setting on the multiport valve can be used to quickly fill up a pool. This setting allows for water to be sent directly out of the filter and into the pool. However, it does not filter the water, so make sure to switch it to the filter setting when done.

5. Is it safe to use the closed setting?

Yes, the closed setting is safe to use. This setting stops water from entering the pool filter and is useful when checking or replacing filter media. Make sure to switch back to the filter setting when done.

Final Words

A multiport valve is a key component for any pool filter. Understanding how to use a multiport valve is essential for keeping the pool clean and functional. Pool owners can use the different settings, such as Filter, Waste, Recirculate, Closed, Backwash and Rinse, to ensure their pool remains in good condition. It is important to follow the manufacturer’s instructions and observe safety precautions when dealing with this valve. Following these tips will help pool owners maintain their pool filter system and keep their pool clean for years to come.