Part # 1700C15
Alternate Part #'s 26-350-1140, NDS1700C15
Flo Control check valve prevents backflow to protect sensitive equipment from chemical damage.
True union design allows the valve to be disassembled by unscrewing the in-line nuts, leaving the tail pieces cemented to the pipe. The valve body can be removed for visual inspection, repair, or cleaning, making it easy to change the body or spring tension.
Sizes 1½" & 2" IPS
Standard spring tension ½ lb.
EPDM seal and "O" Rings
200 PSI static pressure rating @ 72ºF
Stainless steel spring
Excess solvent trap
Valve body length = 8.345" (body length includes unions)
Valve body length without unions is approx. 5.05".
I have the 1700 c15 check valve installed between the output of the pump and the input for the filter.It is showing a lot of bubbles. Is this the wrong place to install it? Should I install it in the suction line before the pump? have a 1hp(new from you) motor and pump. Would i be better off with a Jandy type round check valve?
The air is coming from somewhere, could be a suction leak. Or is there a ozone injector bring O2 into the plumbing. Does your pump lose prime after not running for a period on time. After not running for a period of time is there is the a large number of bubbles being put though the plumbing. If so look for suction side leaks or air being sucked into the skimmer.
Can you tell me the gallons per minute that the check valve allows? We have a Hayward cl200 in line chlorinator that needs 50 gallons per minute to work properly. We had problems maintaining proper chlorine levels even though the pool was balanced properly and the chlorinator had no problems.
This check valve will allow approx. 65 gpm, exceeding the 50 gpm that you are needing.
What is the difference between the Flo control check valve Clear 1 1/2 in model 1700 C 15 and the Flo control model # 1720 C 15?
The appear to be exactly alike.
This 1700C15 is a spring check valve where the 1720C15 is a swing check valve. Basically the insides are different one use a spring and the other uses a flapper.
Which Check Valve Model, the 1700 C15 or the 1720 C15 Would work best between a pool heater and a Salt Chlorinator system as far as corrosion resistance? Thank you. Mark S. Pitts.
They both will work fine as they are made out of the same material, the 1700C15 is our most popular check valve.
What is the ips of treaded part of 1 1/2 inch valve.(where union part screws onto? Thanks!
The threads are Female buttress thread on the 1 1/2 union. IPS Iron Pipe thread standard and is not the same thing, IPS is the same as NPT. For union only use 89-350-1100 for just the union. You would use just half of the union and throw the other half away.
I have the Clear Check Valve 1.5" - 1/2 lb. w/ Unions - 1700C15 that I ordered fron inyo pools. However, I will need new orings for it for next pools season. Would you be able to tell me what to order from you for this?
How is the rubber o ring inside the check valve suppose to work; in that should the o ring slide back up into the body of the check valve once the pool pump shuts off?
Hi, Jimmy. The black rubber inside of the valve seals the spring shaft so that water does not seep through that part of the valve.
Can you ship this item to the US Virgin Islands? We have US Postal Service.
Hi, Kurt. We can ship this item to the U.S. Virgin Islands, please provide the quantity and your shipping address so we can send you a quote.
I'm losing my prime on pump. How far from the suction side inlet should I place a check valve? Most of the line is under concrete, I only have about a foot of line to access. Will that work?
Hello Bill - The check valve can be installed within a few inches of the intake of the pump. A foot of pipe will be sufficient for the check valve install.
Does this item come with a warranty? Is there easy access for cleaning?
Flo Control model 1700C15 has a one year warranty. This valve can be cleaned easily by removing the valve body from the unions.
(5 out of 5 stars) Check Valve
Reviewed By: Bill Saumier from Spring Valley, CA ()
Pros: Good quality product exactly as advertised.
The check valve works great and is easy to install. If you order this from the pool store is will cost 2 time the cost.
(1 out of 5 stars) Rubber O-rings and internal rubber seal ring are not chlorine safe
Reviewed By: ()
Not to be used before an automatic chlorinator. The rubber O-ring that is internal to the check valve and the O-ring that is in the union that goes to the automatic chlorinator deteriorate, gets hard and brittle, then start to crumble from the chlorine. I installed mine between the water heater and the chlorinator and they only lasted one season. You can replace the O-ring in the union but the internal O-ring that is used as a seal when the valve is spring closed cannot be replaced. You have to buy a new check valve.
(5 out of 5 stars) Highest Recommendation
Reviewed By: ()
Great check valve...no chlorine can backflow to your multiport or filter when the pump shuts off. Being clear is also a huge advantage so you can see if anything gets into the check valve on the inflow side. The fact that you can then remove the valve and eliminate any foreign material because of the unions makes this the best check valve we have ever had. Extremely sturdy and well built. Highest recommendation.
(5 out of 5 stars) Check Valve
Reviewed By: Steven G. from Sunnyvale, TX ()
Pros: Cost, Accessable for minor maintenance
My order arrived on time and the product worked as advertised. The union connections have already proved useful to facilitate the removal of a minor blockage to the diaphragm.