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Thread: Dolphin M4 - Doors do not latch well.

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    Join Date
    May 2015
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    Sherwood, AR
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    28

    Dolphin M4 - Doors do not latch well.

    Second season with Dolphin M4. The design is the same as many others. I researched and understand the manufacture history, variant models, etc.
    Upon receipt I notice that the doors didnt latch well, poor design tolerance. However, 99% of the time the doors remained shut during cycle. This season Im 0 of 3.
    Anyone experienced this problem and/or fixed? Im about to scour the web..
    Anyhow, Im pretty handy and probably can pull it apart and modify it.
    House came with dolphin that I found was 10 yrs old (aka hayward tiger shark). It worked great except I found myself making absurd amount of repairs too it (after fabricating fiberglass parts), I decided to retire it.

    27k gallons, 18x36, Chlorine, Vinyl

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    Patrick_B's Avatar
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    Jun 2011
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    Re: Dolphin M4 - Doors do not latch well.

    No Chuck, can't say I have even heard of this. I've had my M5 for a year, and never had any trouble with it like this.
    TFP Moderator
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    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

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    Join Date
    May 2015
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    Sherwood, AR
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    Re: Dolphin M4 - Doors do not latch well.

    thanks for the reply. Do the buttons, that unlatch door, have any travel? Mine do not.

    27k gallons, 18x36, Chlorine, Vinyl

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    Re: Dolphin M4 - Doors do not latch well.

    I am also on the second season with an M4. The button only moves at the side furthest away from the center of the cleaner. Moves about 1/4 inch. The button doesn't move at all at the side closest to the center. Mine latches just like it did when new. After reading your post I took a close look at the latch. It does look like something that could fail as plastic ages and gets brittle. Does removing the filter have any effect on how it latches ?
    25,000 gallon Inground vinyl liner , Sand filter. Southern PA USA

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    Join Date
    May 2015
    Location
    Sherwood, AR
    Posts
    28

    Re: Dolphin M4 - Doors do not latch well.

    Thanks for taking a look. Filter has no effect. My buttons have virtually no travel, only a little flex. Hard to describe force, but can apply same force on or off button to open door. Can be done with one finger. Latches with just enough force that it will stay closed under its on weight if stood vertical. Figuring faulty latches. No broken plastic. Seems like bad tolerance between hook and edge (aside from no button travel). Think this warrants deeper inspection, maybe trip to vendor.
    Thanks again for comparison.

    27k gallons, 18x36, Chlorine, Vinyl

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