How to Use a Multiport Valve on a Sand Filter

Most sand filters are the same. They mostly all have what is called a multiport valve on the top or on the side.

So let’s say you are looking at your sand filter multiport valve right now. You should have about 6 settings including:

  1. Filter
  2. Backwash
  3. Re-circulate
  4. Winter/Closed
  5. Rinse
  6. Waste

If you don’t have these exact setting you probably have something similar, and these are what they do:

1. Filter Setting

Runs pool water from your pump through the sand filter If you click this link and make a purchase, we earn a commission at no additional cost to you. and back into the pool. You will use this setting about 90% of the time. This is your main setting

Pentair Top-Mount Sand Filter - 2.3 sq. ft. Price: $341.49 Pentair Top-Mount Sand Filter - 2.3 sq. ft. If you click this link and make a purchase, we earn a commission at no additional cost to you. Last Updated: 12/09/2018

2. Backwash Setting

Runs pool water from your pump through the sand filter If you click this link and make a purchase, we earn a commission at no additional cost to you. and out through the waste port dispensing water out of your pool. This is what cleans your dirty sand If you click this link and make a purchase, we earn a commission at no additional cost to you. . You should only backwash when your pressure rises 10 pounds over your normal pressure rate.

Hayward S244T ProSeries Top-Mount Sand Filter - 24 in. Price: $334.89 Hayward S244T ProSeries Top-Mount Sand Filter - 24 in. If you click this link and make a purchase, we earn a commission at no additional cost to you. Last Updated: 12/09/2018

3. Re-circulate Setting

Runs pool water from your pump into your multiport valve If you click this link and make a purchase, we earn a commission at no additional cost to you. and into your pool never touching the sand. This just spins the water around. Some chemicals, like flocculant If you click this link and make a purchase, we earn a commission at no additional cost to you. , require you to do this. Rarely used.

Hayward S210T ProSeries Top-Mount Sand Filter - 20 in. Price: $275.95 Hayward S210T ProSeries Top-Mount Sand Filter - 20 in. If you click this link and make a purchase, we earn a commission at no additional cost to you. Last Updated: 12/09/2018

4. Winter/Closed Setting

This setting closes all the ports in your multiport valve for closing your pool or stopping water from going through the multiport valve.

5. Rinse Setting

Runs pool water from your pump through the sand filter and out through the waste port If you click this link and make a purchase, we earn a commission at no additional cost to you. rinsing the sand clear of dirt. You should always rinse your filter after backwashing ensuring no dirt flies back into your pool after backwashing.

Blue Devil B8315 Sand Filter - 16 in. Price: $169.44 Blue Devil B8315 Sand Filter - 16 in. If you click this link and make a purchase, we earn a commission at no additional cost to you. Last Updated: 12/09/2018

6. Waste Setting

Runs pool water from your pump through your multiport valve and out through the waste port never touching the sand. You will use this setting if you are manually vacuuming your pool and the dirt keeps flying back in through the return line.

This means that the filter cannot filter that much debris at one time so you will have to not use the filter and just suck the debris right out of your pool causing you to lose water. This is very effective If you click this link and make a purchase, we earn a commission at no additional cost to you. at cleaning a large amount of debris.

Hayward VL40T32 VL Series 30 GPM Sand Filter System Price: $209.49 Hayward VL40T32 VL Series 30 GPM Sand Filter System If you click this link and make a purchase, we earn a commission at no additional cost to you. Last Updated: 12/09/2018

Important: Any time you move the handle on your multiport valve to switch positions or settings you must first turn off your pump. Keeping the pump running while moving that handle can cause you to blow the gasket in your valve. Not an expensive fix, but a fix you can avoid.

Happy Swimming!

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