White Check Valve 1.5" - 1/2 lb. w/ Unions - 170015



Part # 170015

By Flo Control

  5 Average  



Part # 170015

Alternate Part #'s NDS1700-15

Product Description

True Union Spring Check valve. Easy entry removable body, for visual inspections or cleaning. Available in clear. Each valve is specially designed to be disassembled by unscrewing the nuts in line leaving the tail pieces solvent cemented to the pipe. This true union allows you to remove the body for repairs, or cleaning, even providing the opportunity to change the body or spring tension.

Sizes 1½" & 2" IPS
Standard spring tension ½ lb. ( other spring loads available on special request )
EPDM seal and "O" Rings
200 PSI static pressure rating @ 72ºF
Stainless steel spring
Valve Body Length = 8.345" (Body Length Includes Unions)
Excess solvent trap

Product Specifications

1 1/2 in.
1/2 lbs.

?     Asked on 6/2/2022by Inyo Visitor

is this valve usable with chlorinated water ?

A  Answered on 6/3/2022 by InyoPools Product Specialist Craig C.

Hello.  The White Check Valve 1.5" - 1/2 lb. w/ Unions - 170015 is compatible with chlorinated water. 

?     Asked on 2/26/2020by Hans

Is there any pressure loss data available?

A  Answered on 2/26/2020 by InyoPools Product Specialist Lennox H.

Hi, Hans. That info is listed on pages 25-28 of the NDS 2018 Product Catalog

?     Asked on 6/8/2018by Dave

Hi. Does anybody know the body length with the unions removed? My valve needs replacing and if I can just slip the new body in to replace the old valve body that would be WAY better. The spring check valve I have now (Flo D-2466) looks to be obsolete with no definitive replacement. My valve body is 5-3/16" end to end (unions removed).

A  Answered on 6/12/2018 by InyoPools Product Specialist Lennox H.

Hi, Dave. This Check Valve is 5.12" without the unions.  

?     Asked on 4/5/2018by Guy Ethier

Does this check valve come with, or be able to use, Viton O rings? I ask this because the OEM O rings are not bleach resistant and will deteriorate within a couple of years. Thank you,

A  Answered on 4/6/2018 by InyoPools Product Specialist Lennox H.

Hi, Guy. This o-ring does not come with or have replacement viton o-rings. 

?     Asked on 3/6/2018by Leon

Is this a flapper valve or a plunger type valve as l will be mounting it horizontally and a flapper valve will be better suited for the application. Cheers

A  Answered on 3/6/2018 by InyoPools Product Specialist Kevin G.

Hello, this system uses a spring valve mechanism.  

?     Asked on 10/9/2016by Lou

Is this valve corrosion resistant and can it be mounted vertically?

A  Answered on 10/12/2016 by InyoPools Product Specialist Scott W.

Yes, it can be mounted vertically, but keep in mind that when this valve is horizontal the spring tension is 1/2 pounds. Due to gravity the spring tension might increase so the pump will have to have a high enough flow rate.

?     Asked on 5/19/2016by Inyo Visitor

When my pool pump is off the water flows back to the pool and the pump takes about 20 min to prime when back on. Can I install a check valve between the pump and the filter (sand). If installed before the pump and the basket there may be a problem with leaves, etc in the check valve.

A  Answered on 5/22/2016 by InyoPools Product Specialist Hector F.

It is more common to install a check valve in front of the pump and as long as the skimmer basket is catching most of the leaves and debris then it should be fine.

?     Asked on 5/15/2016by Andy

what is the over all length of the valve. I need to know how much pipe to cut out and if I even have the room left to attach it.

A  Answered on 5/18/2016 by InyoPools Product Specialist Lennox H.

Hi Andy, The length of this valve is 8.345" including the unions.

?     Asked on 5/3/2016by joanie

The unions at the bottom of the check valve are still leaking. We changed the o-rings but it's still leaking. what could be wrong? Do we need another check valve with the new unions/nuts?

A  Answered on 5/12/2016 by InyoPools Product Specialist Alex V.

Joanie, If the check valve is still leaking after replacing the o-rings, there may be dirt/debris in the threads of the unions. If there isn't any, I would recommend replacing the check valve.

?     Asked on 6/22/2015by Jerry Shannon

will this check valve work with flex lines? What parts do I need to use this on a flex line operation.

A  Answered on 6/23/2015 by InyoPools Product Specialist Lennox H.

Hi Jerry, Check valves are not recommended to use with flex pipe, you will need the use PVC for the check valve then connect the PVC to the check valve using a 2" slip x slip coupling. You can find such coupling at your local hardware store.

?     Asked on 6/2/2015by CHERYL

My raised spa drains back to the pool when the pump is off. My question is where do I place the check valve at? Do I put it after the chlorinator (check valve being the last thing out) or do I install it between the heater and chlorinator (check valve being second to the last thing out) chlorinator being last thing out??

A  Answered on 6/13/2015 by InyoPools Product Specialist Lennox H.

Cheryl, You will need to install the check valve after the chlorinator, the check valve should be the last thing on the return to the Spa.

?     Asked on 9/16/2014by Guest

My spa drains when the pool pump is off. Will adding or replacing one of these fix this?

A  Answered on 9/16/2014 by InyoPools Product Specialist Patrick P.

Yes that very well may solve the issue. Per gravity, a raised spa will drian into the pool if the check valve is bad or if there is not one there.

?     Asked on 1/18/2012by Guest

Is it possible to purchase just the insert part of this as a replacement?

A  Answered on 1/18/2012 by InyoPools Product Specialist Patrick P.

There is no replacement part for that and you would need to replace the whole unit.

?     Asked on 11/30/2007by Guest

How long is this valve?

A  Answered on 11/30/2007 by InyoPools Product Specialist Patrick P.

According to the manufacturer, the valve is 8.345" long.


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