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Thread: check valve differences

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    check valve differences

    Hello to all,

    This will be my shortest post ever: What's the difference btw these 2 check-valves?

    Thank you, tstex
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    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward H400FD 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill If you enjoyed your TFP experience, please consider donating to Support TFP!

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    JoyfulNoise's Avatar
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    Re: check valve differences

    The serviceable Jandy valve is..well....serviceable. Therefore, better.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Mod Squad Jimrahbe's Avatar
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    Re: check valve differences

    Tx,

    The Jandy is the one you should use and the other one is..... not...

    Jim R.
    Finished in 2015 - 17K Gal, IG, 20' x 25' Almost Rectangular Pool, Pebble finish, three rockport water falls. Pentair Equipment: EasyTouch 4, IC40 SWG, 3 HP VS Pump, CCP520 Cartridge Filter.
    TF100 with SpeedStir and SampleSizer, ColorQ Pro 7, Dolphin Premier Robot Cleaner, added Screen Logic 2, added small 3 person Caldera Spa.

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    Re: check valve differences

    Well; i have 4-5 Jandy valves and one of the non serviceable or not to cool valve. The clear one is what separates the puck machine from the heater to prevent concentrated CL from backing into heater. I only use the pucks when i need to increase my CYA or I'm leaving town and none of my TFP pals will come over to dispense some liquid bleach
    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward H400FD 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill If you enjoyed your TFP experience, please consider donating to Support TFP!

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    JoyfulNoise's Avatar
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    Re: check valve differences

    Quote Originally Posted by tstex View Post
    Well; i have 4-5 Jandy valves and one of the non serviceable or not to cool valve. The clear one is what separates the puck machine from the heater to prevent concentrated CL from backing into heater. I only use the pucks when i need to increase my CYA or I'm leaving town and none of my TFP pals will come over to dispense some liquid bleach
    If you leave out a margarita machine with an ample supply of ice and booze, WoodyP will be more than happy to take care of your pool....
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: check valve differences

    I might be making a deal w woody...
    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward H400FD 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill If you enjoyed your TFP experience, please consider donating to Support TFP!

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    Re: check valve differences

    Checks are not perfect and over time they will leak, one requires a hacksaw, the other, screwdriver
    Casey
    Intex 24' x 52" closed for winter 2018, 2 Main Drains, 1 Skimmer, 1 Return, PVC
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    Re: check valve differences

    Quote Originally Posted by cfherrman View Post
    Checks are not perfect and over time they will leak, one requires a hacksaw, the other, screwdriver
    That seems to put it into pretty good perspective....I guess I'm going to need some couplers and PVC sometime in the near future

    How can you tell if a ck valve is starting to fail ???
    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward H400FD 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill If you enjoyed your TFP experience, please consider donating to Support TFP!

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    Mod Squad mknauss's Avatar
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    Re: check valve differences

    You can tell it is failing if it no longer 'checks' the flow of water it was installed to control.
    6000 Gallon IG Fiberglass with integrated Spa;Pentair CCP240 Cartridge Filter with Pentair Intelliflo VS Pump and HTR250 heater. IC40 SWG. EasyTouch 4. Dolphin Active20 Robot "Roadrunner", TF 100 Test Kit w/SpeedStir!
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    Re: check valve differences

    Quote Originally Posted by mknauss View Post
    You can tell it is failing if it no longer 'checks' the flow of water it was installed to control.
    Ho ho ho
    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward H400FD 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill If you enjoyed your TFP experience, please consider donating to Support TFP!

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    Re: check valve differences

    Aside from holding prime in a pump, typical slight leakage from a check should not be a problem.
    Casey
    Intex 24' x 52" closed for winter 2018, 2 Main Drains, 1 Skimmer, 1 Return, PVC
    1/2 HP Intex Pump 633T w/ Taeglus TA-40 175 lb 19.5" Sand Filter, Auqabot Extreme Robot
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    Re: check valve differences

    Quote Originally Posted by tstex View Post
    How can you tell if a ck valve is starting to fail ???
    Depends on where it's plumbed and what it's used for. I have two check valves: One on the output of my heater to prevent super chlorinated output from the SWG from backing into the heater as you mentioned and also on my output side for my spa.

    I have a raised spa that spills into the pool which the pool's water level is a few feet lower than my spa. The check valve on my plumbing output is vital to maintain the water level in the spa to the tile line when the pump is off. My water level has been slowly lowering in the spa so the check valve needs to be replaced as the leaky check valve allows enough water to seep by into the pool overnight so that there are a few inches of exposed spa plaster (I have mini-pebble) by the next morning. I have the Jandy valve pictured above as the replacement piece is only $25 on Amazon and as mentioned is an easy fix. (search Jandy 7056 on Amazon) My equipment is about 5 years old now so $25 every 5 years is not much to worry about.

    What's cool about the Jandy check valve is that FloVis makes a retrofit meter that drops right into the Jandy 2" - 2 1/2" check valves that serves both purposes. (Amazon for $115) Nice for calculating run time for variable speed pumps. But since my output plumbing is split between pool and spa output, that won't be a good place for the meter retrofit to get an accurate reading so only the $25 replacement will go there. The meter retrofit I'll put in on the heater output side check valve. (datsaheet says it's rated up to 140 degrees F)
    15'x35' IG 16,500 gallons w/attached raised 18" spa continuous coping w/underneath spill and ledger stone wrapped, NPT mini pebble aqua blue w/2x pigment & abalone shell finish, 2"x24" travertine coping, 3x Jandy Color LED lights (2 in pool), Jandy Flo Pro 2HP VS pump, Jandy LXI (low NOx) 400K BTU heater, Jandy CL460 cartridge filter, Jandy AquaPure Ei SWG, Jandy Z4 automation with iAqualink and remote poolside PDA, 1,300 sqft Belgard Catalina paver deck with drainage, fire pit that matches the spa with travertine coping and wrapped in ledger stone, Elitewood insulated patio cover, Vinyl gates, back vinyl fence coming soon...
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    Re: check valve differences

    Quote Originally Posted by jv92red View Post
    Depends on where it's plumbed and what it's used for. I have two check valves: One on the output of my heater to prevent super chlorinated output from the SWG from backing into the heater ..........
    How big is your SWG? Most SWG’s will take hours to create 3-4ppm of FC, that is hardly ‘super chlorinated’. Also, if you have your SWG cell set to run within the running time of your pump, the cell will shut off before the pump, so the pump will have time to ‘flush out’ the cell.

    But back on topic, I believe that the Jandy style check valves also create much less system back pressure compared to the ‘sealed’ type.


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    Re: check valve differences

    Quote Originally Posted by jv92red View Post
    Depends on where it's plumbed and what it's used for. I have two check valves: One on the output of my heater to prevent super chlorinated output from the SWG from backing into the heater as you mentioned and also on my output side for my spa.

    I have a raised spa that spills into the pool which the pool's water level is a few feet lower than my spa. The check valve on my plumbing output is vital to maintain the water level in the spa to the tile line when the pump is off. My water level has been slowly lowering in the spa so the check valve needs to be replaced as the leaky check valve allows enough water to seep by into the pool overnight so that there are a few inches of exposed spa plaster (I have mini-pebble) by the next morning. I have the Jandy valve pictured above as the replacement piece is only $25 on Amazon and as mentioned is an easy fix. (search Jandy 7056 on Amazon) My equipment is about 5 years old now so $25 every 5 years is not much to worry about.

    What's cool about the Jandy check valve is that FloVis makes a retrofit meter that drops right into the Jandy 2" - 2 1/2" check valves that serves both purposes. (Amazon for $115) Nice for calculating run time for variable speed pumps. But since my output plumbing is split between pool and spa output, that won't be a good place for the meter retrofit to get an accurate reading so only the $25 replacement will go there. The meter retrofit I'll put in on the heater output side check valve. (datsaheet says it's rated up to 140 degrees F)
    JV, great explanation - thank you...my biggest concern would be the clear glass Ck-Valve that prevents back-flow of concentrated CL into the heater...As an avid TFP chemistry follower, I only use the puck dispenser when I need to add CYA [and get a break from adding bleach] and when we as a family travel. But, the latter has been a rarity bc the Hayward ecostar-less VSP trips the breaker and hence a green pool...

    as stated, my biggest concern is the copper heat-exchanger w concentrated CL back-flowing and how to detect that other than my heater not working and damage after the fact - my equip pad is 37 months operable, so next winter I might replace the clear valve w the jandy and highly consider the FloVis meter for the jandy valve. I'd be interested in how long these have been in production and if there's a 5-yr history to determine if they work well?

    Thanks again jv, tstex
    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward H400FD 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill If you enjoyed your TFP experience, please consider donating to Support TFP!

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    Mod Squad mknauss's Avatar
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    Re: check valve differences

    With a puck feeder/chlorinator, you do need a check valve between it and your heater. The pucks continue to dissolve even with the pump off. With a SWCG, the chlorine production ceases when the pump stops flowing (you must have a method to remove power to the SWCG when the pump is off).

    A flow meter is a novelty, but not necessary. You need to run your pump at whatever speed and for however long it takes to clean the pool, generate chlorine if using a SWCG, and that is it. Turnovers mean nothing.

    Take care.
    6000 Gallon IG Fiberglass with integrated Spa;Pentair CCP240 Cartridge Filter with Pentair Intelliflo VS Pump and HTR250 heater. IC40 SWG. EasyTouch 4. Dolphin Active20 Robot "Roadrunner", TF 100 Test Kit w/SpeedStir!
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    Marty

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    Re: check valve differences

    Thanks Marty.

    I do have a Ck valve btw puck dispenser & heater. It's the clear one pictured, so inevitably it will need to be cut out and replaced. My question is when?

    I don't use the puck dispenser except for maybe 3-4 times a year only to mainly raise CYA. Thanks
    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward H400FD 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill If you enjoyed your TFP experience, please consider donating to Support TFP!

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    Re: check valve differences

    Quote Originally Posted by tstex View Post
    Thanks Marty.

    I do have a Ck valve btw puck dispenser & heater. It's the clear one pictured, so inevitably it will need to be cut out and replaced. My question is when?

    I don't use the puck dispenser except for maybe 3-4 times a year only to mainly raise CYA. Thanks
    I repaired my check valve (I have the Jandy "use a screwdriver" type) when my spa started to drain down last year. I am not sure how to tell when yours is down, but I would say that the screw-front type is 100% the way to go. Took me a few bucks and 3 minutes to repair the flapper and stop the back leaking.
    - 18k gallons, in ground plaster, dual floor and dual skimmers, city water, Polaris Sport 3900 w/ booster pump, Purex Triton 350 Minimax plus heater,
    Pentair Triton II TR100 sand filter w/ Century Centurion B855 2HP pump and Pentair Sm20-3 mulitport, Compool Cp3400 indoor control, Lx3400 outdoor

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    Re: check valve differences

    Quote Originally Posted by tstex View Post
    Thanks Marty.

    I do have a Ck valve btw puck dispenser & heater. It's the clear one pictured, so inevitably it will need to be cut out and replaced. My question is when?

    I don't use the puck dispenser except for maybe 3-4 times a year only to mainly raise CYA. Thanks
    Do you have unions up the line from that check? You could pop the union monthly to yearly and check it's backflow.
    Casey
    Intex 24' x 52" closed for winter 2018, 2 Main Drains, 1 Skimmer, 1 Return, PVC
    1/2 HP Intex Pump 633T w/ Taeglus TA-40 175 lb 19.5" Sand Filter, Auqabot Extreme Robot
    TF-50 and Taylor 2006 Test Kits, Quality Well Water, Fleck 5800SXT Water Softener

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    Mod Squad Jimrahbe's Avatar
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    Re: check valve differences

    Quote Originally Posted by tstex View Post
    My question is when?
    Tx,

    Well I say 2 years, 3 months, 14 days, 8 hours, and 30 seconds from now...

    And my 'guess' is just about as good as anyone else's.....

    Sorry, but I don't believe there is anyway to know for sure..

    Thanks,

    Jim R.
    Finished in 2015 - 17K Gal, IG, 20' x 25' Almost Rectangular Pool, Pebble finish, three rockport water falls. Pentair Equipment: EasyTouch 4, IC40 SWG, 3 HP VS Pump, CCP520 Cartridge Filter.
    TF100 with SpeedStir and SampleSizer, ColorQ Pro 7, Dolphin Premier Robot Cleaner, added Screen Logic 2, added small 3 person Caldera Spa.

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    Re: check valve differences

    ok guys, I think I have a plan...

    Whenever Jandy ck valves go on sale, I'll buy one...I'm sure this is a Union at the heater [pic 1], but not sure about this one at the puck disperser [P 2].

    If only a union at the heater, I can take off there, cut out the clear ck valve btw puck and ck valve w enough pvc on both sides for couplings, then size it all so the union can put all back on w the correct sizing...sound like a plan? thanks
    Attached Images Attached Images
    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward H400FD 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill If you enjoyed your TFP experience, please consider donating to Support TFP!

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