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Thread: Do DE Filters Require Multiport Valves?

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    Do DE Filters Require Multiport Valves?

    So I have a multiport valve for a hayward sand filter which I pictured below. My question is, is it compatible, and even if it is, do I need it? Everything I've been reading on how my filter works, makes it seem option. I put a link to a picture of my filter below. I recently bought a 50 year old home and the sand filter here, hayward s200 is extremely old, so I decided to change it out.

    Now I'm just not sure if I should the multiport valve or get rid of it.

    Attachment 30150

    Attachment 30150

    http://www.amazon.com/Hayward-EC40AC.../dp/B000EVSUK2
    21k, IG vinyl liner, Hayward ec40 de filter, 1hp 1 speed

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    Mod Squad jblizzle's Avatar
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    Re: Do DE Filters Require Multiport Valves?

    Welcome to TFP!!!

    You will want to have a backwash valve so you do not need to tear the filter down every time it needs to be cleaned, but a full multi-port is not necessarily required (but is a nice to have).

    Sand and DE valves are not compatible.
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    Richard320's Avatar
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    Re: Do DE Filters Require Multiport Valves?

    That is a bump-style DE filter. They don't get backwashed. Check the manual.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Mod Squad jblizzle's Avatar
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    Re: Do DE Filters Require Multiport Valves?

    Well, there you go ... I did not open the links
    Jason, TFP Moderator
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    Re: Do DE Filters Require Multiport Valves?

    Therefore no valve is needed, correct? I'm sorry, I read the manual before postin here. And reading it, it did not sound like a needed a multiport valve.

    I just wanted to verify that.

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    Mod Squad zea3's Avatar
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    Re: Do DE Filters Require Multiport Valves?

    You are correct. For that model of DE filter no multi-port valve is required. You "bump" the filter with the pump handle on top to knock the DE off the fingers and re-distribute it within the filter. It buys you a little time (in my experience very little time) before you have to open up the filter and hose everything off.
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    Re: Do DE Filters Require Multiport Valves?

    Very familiar with those filters and they work great... except when you are vacuuming after a spring swamp. I would get a multiport valve in between the pump and filter so that you can use a "recirculate" setting and vacuum to "waste" because those things are total brats and clog fast and you'll go through a lot of DE quickly. I have several clients who have them and only one has a vac to waste valve. Can be a real pain, just sayin. Not sure where Goldsboro is but if you think your pool will get green over the winter - I'd install a compatible multiport valve.
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    Isaac-1's Avatar
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    Re: Do DE Filters Require Multiport Valves?

    Just to clarify here, the Perflex bump style DE filters can and do get backwashed, and you don't have to open them up every time you change DE. The stock filter comes with a backwash plug, which can easily be switched out for a basic 1 way valve. For my pool, which is indoors so catches a bit less debris, but still more than one might suspect, I generally do a full backwash and DE replacement twice per year, before and after swim season, although I could probably stretch that time out by a couple of months, and just bump during the season, we a full breakdown and cleaning of the filter about once every 2 years. The key difference here is backwashing does not require reversing the water flow through the filter, instead it is just opening the DE chamber up to a drain port while running under normal circulation, on mine I usually cycle the pump a few times to allow the filter to fill up and drain out the backwash port repeatedly, then recoat using the 90% rule.

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    Re: Do DE Filters Require Multiport Valves?

    "backwash" isn't the correct word to use with this type of filter. The water flow is not reversed, and the outlet is called a "drain" rather than a "backwash" port.
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    Re: Do DE Filters Require Multiport Valves?

    Quote Originally Posted by frustratedpoolmom View Post
    Very familiar with those filters and they work great... except when you are vacuuming after a spring swamp. I would get a multiport valve in between the pump and filter so that you can use a "recirculate" setting and vacuum to "waste" because those things are total brats and clog fast and you'll go through a lot of DE quickly. I have several clients who have them and only one has a vac to waste valve. Can be a real pain, just sayin. Not sure where Goldsboro is but if you think your pool will get green over the winter - I'd install a compatible multiport valve.
    Goldsboro is in NC. If the only reason I need a multi-port valve is to waste, couldn't I simply make a PVC pipe that runs into my garden or somewhere and open that valve up to waste, and then close that valve off when I need to filter? It sounds a lot cheaper.
    21k, IG vinyl liner, Hayward ec40 de filter, 1hp 1 speed

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    Re: Do DE Filters Require Multiport Valves?

    Quote Originally Posted by Matt8188 View Post
    Goldsboro is in NC. If the only reason I need a multi-port valve is to waste, couldn't I simply make a PVC pipe that runs into my garden or somewhere and open that valve up to waste, and then close that valve off when I need to filter? It sounds a lot cheaper.
    You are correct. You could put a T in between the pump and the filter with a hose bibb and use that to lower the pool level for just a couple bucks.
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    Re: Do DE Filters Require Multiport Valves?

    Thanks for all the help, gentlemen.

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    Re: Do DE Filters Require Multiport Valves?

    Okay, next issue. I don't know which pipe leads where from my multiport valve.

    I know the top left is where water goes in from the pump. I assume the right is the return to the pool? But what's the left side?
    21k, IG vinyl liner, Hayward ec40 de filter, 1hp 1 speed

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    Re: Do DE Filters Require Multiport Valves?

    Would it make sense if both of the two PVC pipes coming out of my valve went back to pool (I do have two jets on the shallow end, perhaps one pipe for each)?

    I know the top left comes from the pump.

    Maybe the bottom left is a return as is the bottom right? Does that sound right?
    21k, IG vinyl liner, Hayward ec40 de filter, 1hp 1 speed

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    Richard320's Avatar
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    Re: Do DE Filters Require Multiport Valves?

    You should have 5 ports. pump to valve, valve to filter in, filter out to valve, valve back to pool, and waste.

    A multiport is more complicated than a slide valve, but I don;t have a drawing of one of them. But waste would be in from pool and out to waste.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Do DE Filters Require Multiport Valves?

    photo 2 (2).jpg

    - - - Updated - - -

    photo 1 (2).jpg

    - - - Updated - - -

    Here's what I'm talking about. If you look at the 2 pics above, I have two pvc pipes going into my valve on the left and 1 going in to the right.

    I know the top left is where unfiltered water enters from the filter. I'm not certain about the left and the right. I believe both are returns that go to the 2 jets in the shallow end, but I'm not certain.
    21k, IG vinyl liner, Hayward ec40 de filter, 1hp 1 speed

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    frustratedpoolmom's Avatar
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    Re: Do DE Filters Require Multiport Valves?

    Quote Originally Posted by Matt8188 View Post
    Goldsboro is in NC. If the only reason I need a multi-port valve is to waste, couldn't I simply make a PVC pipe that runs into my garden or somewhere and open that valve up to waste, and then close that valve off when I need to filter? It sounds a lot cheaper.
    Yes, that's fine but what I'm talking about that is just as valuable is "recirculate". I utilize it on every pool that has a multiport, and the ones that don't I use a portable submersible pump. It may just be my perception but I've found in DE filters that live algae clogs faster than dead algae, which drops to the bottom of the pool. So I filter on recirculate or with a portable, I balance, SLAM and when I can see the dead stuff drop to the bottom and clarity returns, I vacuum to waste whenever possible and begin filtration. You still go through a lot of DE but I've found I go through a lot less using this method.
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    Richard320's Avatar
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    Re: Do DE Filters Require Multiport Valves?

    The parts diagram shows the ports as being labelled. http://www.hayward-pool.com/pdf/Part...ort-Valves.pdf
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Do DE Filters Require Multiport Valves?

    So, I put the water hose in to see where each PVC pipe leads. The results? Both my return and my skimmer are clogged.

    This is probably what killed my pump. I tried a drain bladder, but no luck. I'm pretty sure the skimmer clog is from stabilizer, idk about the return clog.

    Any advise? I've not hooked up the pump or DE filter yet, and I'm thinking about pouring a ton of sulfuric acid down the pipes.

    Any thoughts?

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