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Thread: Stenner Questions

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    Stenner Questions

    Moderator comment: This post was separated out from this thread: Bye-Bye Liquidator... Hello Stenner!... Maybe. (This time with info in my sig, doh!) - Page 2

    Just reading all this and I am fascinated by this prospect. I have a 9,000 gal in-ground plaster pool. All the equipment is outdoors, unprotected (electrical is under the eaves of the roof line). I live in South TX north of Houston. From the pool calc, I put in about 16-32 oz. of 8.25% bleach to maintain my FC with low (20-30) CYA concentration. So, it sounds like I need:

    1) 3GPD High Pressure Fixed Rate 45MPHP2 Stenner pump ($208 at Lokewell.com)

    2) 15 gal UV-proof (non-clear) storage tank - is bleach sensitive to heat, or just light? I'm also looking on the Lokewell.com site. Stenner makes 15-gal UV resistant tanks that lets you mount the pump right to it. Anyone ever tried these? Seems fit for purpose and just what I need. About $114 at Lokewell.com.

    3) Mechanical timer or digital timer (saw the remark about keeping the timing technology consistent) - not sure how to go with this; from my calcs, I'd need to run the 3GPD pump 1 to 2 hrs per day in peak season. Power failures are rare in our area, and digital would give lots of control. Any recommendations on brands and models of timers?

    Is it easy to wire the Stenner pump to the timer? I think I all I might need an electrician to do is run an additional plug off the circuit used by the pool pump. I would do the rest.

    The 15-gal tank should be more than adequate to chlorinate the pool for several weeks up to about a month from what I can see here.

    Does this sound right?
    Location: College Station, Texas
    9K gal in-ground plaster pool
    Hayward ProGrid D.E. 2420 Filter
    Hayward Northstar Series 1HP Pump/Motor
    Stenner 3 GPD bleach pump and Pentair 320 Inline Chlorinator

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    Mod Squad Bama Rambler's Avatar
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    Re: Stenner Questions

    At 9,000 gallons the 3gpd pump and a 15 gallon tank will easily last you more than a month. While bleach is somewhat sensitive to heat, given the strength we use it will be fine for a month. I have a lean-to over my equipment, but it sits out in the heat and I never worry about the bleach losing strength in the time it gets used up.

    I have a standard 15 gallon plastic drum, but I really like the stenner tank. The fact that you can mount the pump to the tank is a bonus.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Stenner Questions

    Terrific. I am getting very fired up about this system. I hate using pucks, because of CYA buildup, and this is cost effective and ideal compared to SWG option. Awesome!!
    Location: College Station, Texas
    9K gal in-ground plaster pool
    Hayward ProGrid D.E. 2420 Filter
    Hayward Northstar Series 1HP Pump/Motor
    Stenner 3 GPD bleach pump and Pentair 320 Inline Chlorinator

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    Re: Stenner Questions

    Quote Originally Posted by peter.bastian View Post
    Moderator comment: This post was separated out from this thread: Bye-Bye Liquidator... Hello Stenner!... Maybe. (This time with info in my sig, doh!) - Page 2

    3) Mechanical timer or digital timer (saw the remark about keeping the timing technology consistent) - not sure how to go with this; from my calcs, I'd need to run the 3GPD pump 1 to 2 hrs per day in peak season. Power failures are rare in our area, and digital would give lots of control. Any recommendations on brands and models of timers?

    Is it easy to wire the Stenner pump to the timer? I think I all I might need an electrician to do is run an additional plug off the circuit used by the pool pump. I would do the rest.
    The timer comment was mine. In my former profession, we worried about very low likely hood events in our designs. The comment on timer technology was to ensure similar behavior in the event of power outages to prevent dosing w/o the pump running. If you're not worried about that then its not a consideration for you.

    I would recommend the intermatic ET-1100 digital series. If your only going to operate the stenner pump off it, then the ET-1105CR or CPD82 are good options for you if your pump is 115V and my second choice for a 230V pump with the ET-1125CR being my first choice in that case.

    Wiring the stenner pump to the timer consists of wiring an outlet to the timer and plugging the stenner into the outlet. If outdoors you need weather tight enclosures.

    The fact you asked that question, probably implies you should have an electrician hook it up.


    Gary
    20,000 gal IG Plaster Irregular Shaped Pool (1987), Hayward SP3400VSP Ecostar Pump, Hayward Pro-Grid 60 SqFt DE Filter, Hayward Pool-Vac Ultra, TF100, Speed Stir, Stenner Pump & 15 Gallon Tank, Oasis Z5, and LA Spas H.E.E.T Model

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    Re: Stenner Questions

    Quote Originally Posted by peter.bastian View Post
    Terrific. I am getting very fired up about this system. I hate using pucks, because of CYA buildup, and this is cost effective and ideal compared to SWG option. Awesome!!
    Based on my experience you will not be disappointed. I use to get mustard algae about every two weeks on the south walls of my pool. I've now gone 6 weeks with the clearest pool I've every had.


    Gary
    20,000 gal IG Plaster Irregular Shaped Pool (1987), Hayward SP3400VSP Ecostar Pump, Hayward Pro-Grid 60 SqFt DE Filter, Hayward Pool-Vac Ultra, TF100, Speed Stir, Stenner Pump & 15 Gallon Tank, Oasis Z5, and LA Spas H.E.E.T Model

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    Mod Squad tim5055's Avatar
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    Re: Stenner Questions

    I am well into pool season two with my Stenner Pump and I couldn't be happier. Yes, I have to carry jugs to fill the tank, but unlike a SWG I know mine is working just by watching the level go down in the tank.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: Stenner Questions

    I have a dark blue 15 gallon container that sits in sun. I noticed it got real hot. I ended up putting it inside a garbage can with a lid and now real cool. Don't know if heat was hurting bleach but I know the cool does not.
    8500 gallon IG Pebble Sheen with Spa. 3hp Pentair VS Intelliflo ( pool ), 3/4 hp WhisperFlo ( water feature ),Pentair Racer, 400K Pentair heater, Pentair 500sqft Cartridge filter, EasyTouch 8, Stenner 45mp2 15gallon wired to ET8

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    Re: Stenner Questions

    OK. I have the pump and 15 gal tank all set up (still waiting for electrician to come to install the power plug). In the mean time, I have plugged the pump into a wall outlet, and it is all connected to the pool water flow outlet downstream of the filter, etc.

    I've got the little flow meter hooked up, mounted vertically on the tank, flow direction pointed UP, and close to the pump, and slightly below the elevation of the pump itself. When I run the pump, the little ball in the flow meter does not move. I know the pump is moving fluid - I've got water in the tank for testing, and if I disconnect the line from the top end of the flow meter, fluid comes out. I also did a test - at 3 GPD, that should be 8 oz in 30 minutes. Ran pump for 30 mins into a measuring cup and it pumped out 8 oz in 30 minutes, as it should have. So, its working. Question is why the little flow meter ball isn't moving, or floating up in it's little tube.

    Thoughts anyone?
    Location: College Station, Texas
    9K gal in-ground plaster pool
    Hayward ProGrid D.E. 2420 Filter
    Hayward Northstar Series 1HP Pump/Motor
    Stenner 3 GPD bleach pump and Pentair 320 Inline Chlorinator

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    Re: Stenner Questions

    See my post above.
    Location: College Station, Texas
    9K gal in-ground plaster pool
    Hayward ProGrid D.E. 2420 Filter
    Hayward Northstar Series 1HP Pump/Motor
    Stenner 3 GPD bleach pump and Pentair 320 Inline Chlorinator

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    Re: Stenner Questions

    Try running the flow meter between pump and injector. Since a Stenner is not a constant flow but a pulse type flow it might not work before pump. Just a guess though!
    8500 gallon IG Pebble Sheen with Spa. 3hp Pentair VS Intelliflo ( pool ), 3/4 hp WhisperFlo ( water feature ),Pentair Racer, 400K Pentair heater, Pentair 500sqft Cartridge filter, EasyTouch 8, Stenner 45mp2 15gallon wired to ET8

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    Mod Squad Bama Rambler's Avatar
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    Re: Stenner Questions

    What is the range of the flow meter? My guess is that the range of the meter is too great to measure as small a flow as the pump produces.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Stenner Questions

    RPHPool - the flow meter is downstream of the discharge output from the Stenner pump, so it is correctly placed with regards to the flow. I have about 8" of tubing between the Stenner pump discharge port, and the inlet to the flow meter. I've mounted the flow meter directly to my liquids tank that the Stenner is installed on.

    Bama Rambler - that is my main thought. Since I tested the Stenner by using an 8 oz measuring cup, I know the Stenner is putting out its designed capacity. Exactly 8 oz in 30 minutes...I don't know where to find the rated range of the flow meter, though...I looked on the packaging and it doesn't say anything about that. Packaging says it is an AK600 (which simply means it is for for 1/4" tubing), but beyond that, I just don't know enough about it. I am expecting to see a pulse, vs. continuous flow..I get that, because of the way the pump does its thing. But, the ball just sits on the bottom of the flow meter. No movement. I do see small air bubbles trapped in the flow meter, and you can see the bubbles pulsing. So, that's another indication that things are moving.

    Just want that little ball to do its thing!! Haha!
    Location: College Station, Texas
    9K gal in-ground plaster pool
    Hayward ProGrid D.E. 2420 Filter
    Hayward Northstar Series 1HP Pump/Motor
    Stenner 3 GPD bleach pump and Pentair 320 Inline Chlorinator

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    Re: Stenner Questions

    Found this online, might give it a try on suction side.

    STENNER IN-LINE FLOW INDICATOR, 1/4" — In-line solution flow indicators installed on chemical feed pump suction tubing. Float rises as solution is drawn by the chemical feed pump. 1/4" tubing size.

    http://www.lincolnaquatics.com/shop/...uctID=11-AK600

    says to install on suction side.
    8500 gallon IG Pebble Sheen with Spa. 3hp Pentair VS Intelliflo ( pool ), 3/4 hp WhisperFlo ( water feature ),Pentair Racer, 400K Pentair heater, Pentair 500sqft Cartridge filter, EasyTouch 8, Stenner 45mp2 15gallon wired to ET8

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    Re: Stenner Questions

    Thanks, rphpool, for helping out with some research. Unfortunately, the instructions that came with the flow indicator clearly show installation on the discharge side, and this makes sense...the pulses of fluid coming out of the pump should move the ball up with each pulse. I could try swapping it - maybe the suction would lift the ball up, instead of discharge pushing ball up.

    Will let you know.
    Location: College Station, Texas
    9K gal in-ground plaster pool
    Hayward ProGrid D.E. 2420 Filter
    Hayward Northstar Series 1HP Pump/Motor
    Stenner 3 GPD bleach pump and Pentair 320 Inline Chlorinator

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    Re: Stenner Questions

    Ok, no change. Hooking it up on suction or discharge makes no difference. Paperwork that came with flow indicator says hook it to discharge side, so that's the way I will leave it.

    So, that leaves me with two possibilities, I think:
    1) The flow indicator isn't rated for 3 GPD pumps (the most likely scenario, I think). Spec sheets show max of 85 GPD, but no reference to a minimum, or
    2) The density of the 8.25% bleach I will be using is about 4% higher than that of plain water. I already know the ball itself is denser than water, because it doesn't float when I run water through the Stenner pump. Maybe the slightly denser chemical solution will be just about right and the ball will do what it is supposed to do??
    Location: College Station, Texas
    9K gal in-ground plaster pool
    Hayward ProGrid D.E. 2420 Filter
    Hayward Northstar Series 1HP Pump/Motor
    Stenner 3 GPD bleach pump and Pentair 320 Inline Chlorinator

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    Re: Stenner Questions

    The good thing though is you know the Stenner works. I just occasionally look at mine to see if it is spinning then go have a margarita! Enjoy the Stenner
    8500 gallon IG Pebble Sheen with Spa. 3hp Pentair VS Intelliflo ( pool ), 3/4 hp WhisperFlo ( water feature ),Pentair Racer, 400K Pentair heater, Pentair 500sqft Cartridge filter, EasyTouch 8, Stenner 45mp2 15gallon wired to ET8

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    Re: Stenner Questions

    Stenner bleach injection system is installed and working. It is very cool. Install of the equipment itself was very very easy. Hardest part was finding an electrician to do the small job of hooking up the digital timer to my electrical panel and running that to a plug that I plug the Stenner motor into.

    I got the Intermatic digital timer, the Stenner 3 GPD high-pressure pump, and Stenner 15 gal tank. By my estimate, the 11 gals of 8.25% bleach i put in the tank should last nearly 3 months. I run the pump twice a day (at 8 am and 8 pm) for 30 minutes each time, which puts about 16 oz of bleach in the pool each day. That means each gal of bleach equates to 8 days of chlorination.

    The only thing not working well is the little flow indicator from Stenner. At 3 GPD rate, the little ball doesn't move/pulse at all when the pump is running, and Stenner tech support told me there wouldn't be much movement. Mine has none. If you are going to use the 3 GPD pump, you can save the $12 or so, and skip the flow indicator. Anyone else have this issue, or see something different, let me know.

    My CL measurement varies between 2 and 3.5 ppm over the last few days I have had the Stenner pump running. I take a sample right before the Stenner comes on, and that is typically at 2 ppm. My CYA is somewhere between 20 and 30, a bit low, but I'm going to see if I can keep things this way.

    Overall, very happy with the Stenner system so far. Works exactly as advertised. I think I can say goodbye to having to pour bleach into my pool.
    Location: College Station, Texas
    9K gal in-ground plaster pool
    Hayward ProGrid D.E. 2420 Filter
    Hayward Northstar Series 1HP Pump/Motor
    Stenner 3 GPD bleach pump and Pentair 320 Inline Chlorinator

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