Understanding Pool Equipment: Pool Filter Multiport Valves


The multiport valve is a device used to control the flow of water through your swimming pool. It has many different settings that can be adjusted depending on what you want to achieve with your pool. In this article, we will discuss each type of setting available on the multiport valve and how they work. This way, you will know exactly how this important piece of equipment works in your swimming pool.

What Does a Multiport Valve Do?

A multiport valve is a device that allows water to flow in and out of the filter system, as well as through it. This allows for proper filtration, but also allows for the movement of other water-based substances such as algae or bacteria. A multiport valve can be used with many types of pool equipment, including pumps, heaters and filters (though not all types will work with every type).

Functions of the Multiport Valve

The multiport valve adjusts the flow of water through your pool. It also has an outlet, which allows you to turn off and on certain sections of your pool. The multiport valve has three ports:

  • One for dispensing water from your skimmer
  • Another for releasing chemicals into the water
  • Another that can be used as a drain if there’s too much debris in the line or if something goes wrong with it

These valves can be adjusted by turning small wheels on both ends of their spindles. The right-hand side will move clockwise while the counterclockwise movement turns leftward. This allows you to set how much water flows through each port depending on what type of filter system you have installed at home.

Now, let’s get into the different filter settings of the multiport valve:


The filter setting of the multiport valve is used to clean the pool. It can also be used for cleaning other parts of your system, like your pump or motors.

The multiport valve has three different settings- no flow, high flow, and medium flow. You may have heard people refer to these as “low,” “medium,” and “high” levels of water flow through the filter. However, this isn’t accurate because they aren’t really different levels at all.

In fact, all three settings are perfectly capable of removing debris from your pool’s filters. It just depends on what kind of debris you want to be removed (and how much effort it takes). Each mode has its own pros and cons, depending on who you ask. Pool filter maintenance can eliminate different problems, so it’s vital that you stay up to date.


The waste setting is used to remove water from the pool, drain the pool and empty it. This multiport valve has two separate connectors that allow you to connect two different types of equipment. For example, if you want a filter and skimmer working together in your swimming pool then this option could be perfect for you.


The closed setting is the most common one, and it’s used when you want to filter water manually. In this case, the multiport valve is set to “closed” and your pool pump will pump water into your pool through its outlet port.

The closed setting can also be used when you have an automatic filter system where there are no gates or screens attached to it. The multiport valve controls how much air gets passed through these types of filters so they don’t clog up too quickly while still providing good filtration quality.


The backwash setting of the multiport valve is used to control how much water is removed from a pool. The multiport valve has two ports, one for each direction of flow. When you turn on one port and open it all the way, it controls that direction’s flow rate. When you turn off that port and close it completely, no water will pass in that direction at all.


The recirculating setting can be used for both chlorine and bromine, but it’s not always necessary for all pools. It is good for keeping your pool cleaner, longer and healthier by allowing water from the bottom of your filter to circulate back into the top of it.


The rinse setting is used to rinse the filter and remove any dirt or debris that may have accumulated in it. This can be done manually by flipping a switch but also by using an automatic timer.

The rinse setting is used to add water to your pool when it needs more than what you have already pumped out of it (i.e., after a rainstorm). It’s important because of how much cleaning up will take once it’s over with. If this isn’t done properly, then there could potentially be damage done around valves and pipes near where they connect together at each end of your system.

How to replace a multiport valve

Replacing a pool filter multiport valve involves several steps:

  • First, turn off the power to the pump and close any valves that control the flow of water to and from the filter.
  • Next, locate the plumbing connections for the filter and use two pipe wrenches to loosen and remove the unions that connect the filter to the plumbing.
  • Once the filter is disconnected from the plumbing, remove the bolts that hold the multiport valve in place and remove the valve from the filter.
  • Before installing the new valve, clean the sealing surface of the filter and the new valve to ensure a secure seal.
  • Carefully align the new valve and hand-tighten the bolts.
  • Finally, use the pipe wrenches to reattach the plumbing connections, turn the power back on to the pump, and open the valves to restore water flow through the filter.

It is important to follow the manufacturer’s instructions and consult a professional if you have any doubts about the process.


Hope this article helped you get a better understanding of the multiport valve. It is an important piece of pool equipment that must be taken care of. If you are looking for more information on pool equipment like filter multiport valves, please contact a local pool professional. They will help you get an understanding of how these valves work and even replace them for you.

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