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Thread: Pipe Size Connecting Equipment

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    Pipe Size Connecting Equipment

    I've finalized my order for my pool kit and am very excited. 18x36 RH Kidney (20000Gallons), 27mil vinyl liner, Hayward Tristar 1HP 2speed pump, Hayward SwimClear 325 cartridge filter, ProLogic Automation with 40K Gal Salt Cell and Raypak 117K btu heat pump. My question comes while I think about connecting the equipment. I'm buying the full kit from PoolSuppliesCanada, who have been extremely professional and helpful in the whole process. They supply 1.5" hose and 1.5" fittings (elbows, couplings, ball valves, ect...) for the plumbing. I notice that all the equipment has 2" connections. I asked them about this and they simply said they recommend using the 1.5" and just step down from the 2" connections where necessary. I'd like to get other opinions on this... I was thinking of going with 2" connections, including valves and check valve, ect. between all my equipment (from pump to filter to heater to salt cell)...and simply stepping down to 1.5" to connect to the piping coming and going from the skimmer, returns, ect. Do you think this would be a complete waste of money, or would I benefit from less friction loss and higher flow where I need it most? I'm ready to purchase my package and would like to order all my fittings and valves the proper size so I don't have to worry about changing them in May when it comes time for the pool build.
    Experienced advice is very appreciated!
    thanks

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    Re: Pipe Size Connecting Equipment

    I would go with 2" as much as possible, including the plumbing to the pool.

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    Re: Pipe Size Connecting Equipment

    Quote Originally Posted by JamesW View Post
    I would go with 2" as much as possible, including the plumbing to the pool.
    Thanks for the feedback. It costs quite a chunk to upgrade all my piping to 2"...and the company selling the stuff says it's not even necessary...however, I realize I'll get more flow and less friction loss, so I may step up and do that. But, I guess the question that isn't clear in my mind is if I stick with 1.5" to the pool, will I still get any benefit of going 2" between the equipment, or will I be limited to the flow I'm getting because of the 1.5" to the pool?

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    Mod Squad jblizzle's Avatar
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    Re: Pipe Size Connecting Equipment

    At a minimum go with 2" on the suction line and the pad plumbing. The return lines could stay 1.5". Yes you will get a benefit at the pad because a lot if the head loss is through all the 90 degree fittings.
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    Re: Pipe Size Connecting Equipment

    The cost shouldn't be a lot higher. How much more is the cost? How much plumbing will be provided? You can always get the plumbing somewhere else if they want too much.

    In addition to better performance, 2" will be quieter.

    How far will the pump be from the pool?

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    Re: Pipe Size Connecting Equipment

    Quote Originally Posted by jblizzle View Post
    At a minimum go with 2" on the suction line and the pad plumbing. The return lines could stay 1.5". Yes you will get a benefit at the pad because a lot if the head loss is through all the 90 degree fittings.
    Thanks...that's what I was thinking...but to get that benefit do I need 2" right from the skimmer...or can I use the 1.5" included from skimmer to the pool shed then step up to 2" at the shed?

    - - - Updated - - -

    Quote Originally Posted by JamesW View Post
    The cost shouldn't be a lot higher. How much more is the cost? How much plumbing will be provided? You can always get the plumbing somewhere else if they want too much.

    In addition to better performance, 2" will be quieter.

    How far will the pump be from the pool?
    I'm looking into the cost right now...it might not be as much as I thought. There is 100' of 1.5" provided...but I figure i will need 150-200' alltoghether, so I added a second 100' length... The pump will only be about 15' from one end of the pool...but of course the piping will be much longer to go to the 2 returns and come from the skimmer...

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    Mod Squad jblizzle's Avatar
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    Re: Pipe Size Connecting Equipment

    Ideally the entire suction line would be 2" (especially if you only have 1 suction line), but anything would help.
    Jason, TFP Moderator
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    Re: Pipe Size Connecting Equipment

    Quote Originally Posted by jblizzle View Post
    Ideally the entire suction line would be 2" (especially if you only have 1 suction line), but anything would help.
    Well...there is one suction line from the skimmer....and 2 drains (from what my pool builder told me, I need 2 drains). I'm not sure myself how that plumbing works...do the 2 drains simply connect with the suction line from the skimmer?

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    JasonLion's Avatar
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    Re: Pipe Size Connecting Equipment

    The two drains always connect together into one line right near the drains. From there the line can either go to the skimmer, or the equipment pad. It is far better if the line from the drains goes to the equipment pad.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Pipe Size Connecting Equipment

    I would use 2" from the skimmer. The main drains tee together and then go to the equipment pad. I would put a valve on each (skimmer and main drain) to control each independently.

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    Re: Pipe Size Connecting Equipment

    Quote Originally Posted by JasonLion View Post
    The two drains always connect together into one line right near the drains. From there the line can either go to the skimmer, or the equipment pad. It is far better if the line from the drains goes to the equipment pad.
    Thanks for the info!...these are the things I'm trusting the guys who are building the pool to know....but I like to have the info myself so I'm informed when talking to them about it. I'm obviously not very knowledgable when it comes to this part of the setup. If the line from the drains goes to the equipment pad, what does it connect to?...and is there always water circulating from the drains to the pump...like the skimmer...or are the drains valved, as James states, then only opened if I'm actually draining water? Sorry for the stupid question, just trying to understand the whole setup.
    Thanks again

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    Re: Pipe Size Connecting Equipment

    You want valves just in case. Normally they are both open. Then the two lines connect together and feed into the pump.

    Water is drawn from both the drain and the skimmer any time the pump is running during normal operation.

    You typically turn off the drain line when vacuuming, to give more suction to the skimmer. You typically turn off the skimmer if you are draining the pool, so it doesn't draw in air.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Pipe Size Connecting Equipment

    Quote Originally Posted by JasonLion View Post
    You want valves just in case. Normally they are both open. Then the two lines connect together and feed into the pump.

    Water is drawn from both the drain and the skimmer any time the pump is running during normal operation.

    You typically turn off the drain line when vacuuming, to give more suction to the skimmer. You typically turn off the skimmer if you are draining the pool, so it doesn't draw in air.
    Makes perfect sense...thanks for the explanation!

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    Re: Pipe Size Connecting Equipment

    Quote Originally Posted by JamesW View Post
    The cost shouldn't be a lot higher. How much more is the cost? How much plumbing will be provided? You can always get the plumbing somewhere else if they want too much.

    In addition to better performance, 2" will be quieter.

    How far will the pump be from the pool?
    My PB stated the 2 inch is 70 cents more a foot. He uses the PVC flex. Rigid PVC is 17 cents more. This is going from 1.5 inch to 2 inch.
    20X36 IG vinyl (18,000 gal), 3 sheer descents, Max-Flo 1.5hp VS 2300, Aquarite T15 SWG, C3030 filter, 250,000 BTU heater, Sharkvac XL (Hayward equip)

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    Re: Pipe Size Connecting Equipment

    So 300' of 2" flex is a $210 upgrade. Given what the pool costs, that is well worth paying for. and trivial when placed next to the cost of the entire pool.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: Pipe Size Connecting Equipment

    Quote Originally Posted by JasonLion View Post
    So 300' of 2" flex is a $210 upgrade. Given what the pool costs, that is well worth paying for. and trivial when placed next to the cost of the entire pool.
    Absolutely agree. Don't forget the additional cost for the valves and fittings as well.
    Last edited by Donny; 03-08-2014 at 09:02 AM. Reason: added additional sentence
    20X36 IG vinyl (18,000 gal), 3 sheer descents, Max-Flo 1.5hp VS 2300, Aquarite T15 SWG, C3030 filter, 250,000 BTU heater, Sharkvac XL (Hayward equip)

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    Re: Pipe Size Connecting Equipment

    Thanks guys...your advice made total sense...(even though the company selling the stuff said it was unnecessary)...I went ahead and upgraded it all to 2" flex...and changed all my valves, elbows and fittings to 2". I felt MUCH better with that decision!

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    Re: Pipe Size Connecting Equipment

    Quote Originally Posted by coreyadam View Post
    Thanks guys...your advice made total sense...(even though the company selling the stuff said it was unnecessary)...I went ahead and upgraded it all to 2" flex...and changed all my valves, elbows and fittings to 2". I felt MUCH better with that decision!
    I did the same thing. Good luck!
    20X36 IG vinyl (18,000 gal), 3 sheer descents, Max-Flo 1.5hp VS 2300, Aquarite T15 SWG, C3030 filter, 250,000 BTU heater, Sharkvac XL (Hayward equip)

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