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Thread: New Sand Filter water diffuser question.

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    Join Date
    Apr 2016
    Location
    Las Vegas, NV
    Posts
    15

    Question New Sand Filter water diffuser question.

    Hello TFP!

    I am getting a pool that has been empty for a couple of years back in shape. The plaster was redone earlier this month and I have been limping the system along with the old cartridges that are at least 5 years old. They are a pain in the behind here in Las Vegas. It's a pain to clean four of these big guys and replacing them costs a small fortune. I am in the process of plumbing in a new sand filter, the information for which should be in my signature below.

    I have a question about the design of this filter. I cannot seem to get the neck of the diffuser to swivel to one side or the other, and I have been unable to get information from Hayward on whether or not it is supposed to. The manual makes little sense, at one point saying to cover the diffuser to add the sand, but in another section they somehow expect that someone with really skinny arms can reach in and ensure that the laterals are tight.

    Does anyone know if it should rotate, or come off? How about cutting into the pipe and adding a swivel of some sort?

    Here is a picture of the diffuser through the top hole:
    diffuser.jpg

    Thank you, I have already learned so much from lurking for about one month!
    -Cody
    14000g freeform gunite/plaster IG pool with raised spa. Hayward HCF302 Commercial 30inch 650lb sand filter with pool sand and pea gravel base, two 2hp Hayward Northstar pumps circa 2003 model SP4000Z1. One pump dedicated to the roaring waterfall and two skinny waterfall lip things. Pool built in 2003, all equipment is original except the sand filter. Replastered April 2016. Hand built test kit with Taylor reagents, new 2016.

  2. Back To Top    #2

    Join Date
    Apr 2016
    Location
    Las Vegas, NV
    Posts
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    Re: New Sand Filter water diffuser question.

    And I will apologize now, I noticed after I posted that this probably would be best served in the pump/filter section. First post, and I already made a mistake!
    14000g freeform gunite/plaster IG pool with raised spa. Hayward HCF302 Commercial 30inch 650lb sand filter with pool sand and pea gravel base, two 2hp Hayward Northstar pumps circa 2003 model SP4000Z1. One pump dedicated to the roaring waterfall and two skinny waterfall lip things. Pool built in 2003, all equipment is original except the sand filter. Replastered April 2016. Hand built test kit with Taylor reagents, new 2016.

  3. Back To Top    #3
    Patrick_B's Avatar
    Join Date
    Jun 2011
    Location
    Midland TX
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    Re: New Sand Filter water diffuser question.

    No sweat!

    Moved to pumping station. Welcome to the forum.
    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

  4. Back To Top    #4

    Join Date
    Apr 2016
    Location
    Las Vegas, NV
    Posts
    15

    Re: New Sand Filter water diffuser question.

    OK, so after 2 hours of hold time with Hayward I finally got to talk to an actual person in support. I'll add the information here so that it can become part of the general knowledge base for TFP. The Hayward HCF302 commercial sand filter has a single diffuser right at the opening as pictured above. It is glued in and unable to be removed directly. The way to remove it entails loosening the side coupling and swinging the arm out of the way. I have included pictures below to show what needs to be done. This is the official way to access the bottom laterals for any reason. The larger models, the HCF362 and HCF363 are also commerical fiberglass units but they have a three-way diffuser setup because they are 36in models. Those are easier to reach past, since the diffusers themselves are located out of the way of the center opening. The HCF302 is a 30in. model.

    Here is the picture showing the side connection that must be loosened. The one to be loosened would be the top gray connector right by the filter body itself.

    side mount.jpg
    14000g freeform gunite/plaster IG pool with raised spa. Hayward HCF302 Commercial 30inch 650lb sand filter with pool sand and pea gravel base, two 2hp Hayward Northstar pumps circa 2003 model SP4000Z1. One pump dedicated to the roaring waterfall and two skinny waterfall lip things. Pool built in 2003, all equipment is original except the sand filter. Replastered April 2016. Hand built test kit with Taylor reagents, new 2016.

  5. Back To Top    #5

    Join Date
    Apr 2016
    Location
    Las Vegas, NV
    Posts
    15

    Re: New Sand Filter water diffuser question.

    One more follow up to complete the instructional guide. The ring next to the pump can be loosened without removing the multivalve, but the valve will have to be at least disconnected at the top to rotate the diffuser arm. A 4.5in pair of channel-locks worked great for loosening the connection. I have included a picture of the part loosened and the diffuser arm rotated below. Once it rotates, you can get down in there and tighten those connections. I found that the middle ones were not tight by about 3/16" so it was good to get down there and tighten everything up. Once done, simply rotate the arm back to the upright position and tighten the outside connector. Worked like a charm!
    Pics:


    14000g freeform gunite/plaster IG pool with raised spa. Hayward HCF302 Commercial 30inch 650lb sand filter with pool sand and pea gravel base, two 2hp Hayward Northstar pumps circa 2003 model SP4000Z1. One pump dedicated to the roaring waterfall and two skinny waterfall lip things. Pool built in 2003, all equipment is original except the sand filter. Replastered April 2016. Hand built test kit with Taylor reagents, new 2016.

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