Part # 170020
Dimensions 21" L x 21" W x 13.5" D
Alternate Part #'s 1700-20, 26-350-1270, FLC-56-4106, NDS1700-20
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. The 170020 valve is white.
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 = 9.735" (Body Length Includes Unions)
Excess solvent trap
I need 2" pvc spring loaded compression type check for my Jandy 1.5 HP pump. I have 7260 gL I ground pool with spa and heater. If you have this check valve please let me know.Thank you.
Hi Samuel, The valve on this page meets the specifications you described and this valve is currently in stock. You can purchase this valve directly from the top of this page.
installed this valve on the suction side of my new pump. Now my pump won't prime. I think the suction from the pump won't pull the spring valve open?
Hi. This check valve has a 1/2 lb spring, your pump should be sufficient to open the mechanism. I would check to see if the valve was installed correctly. The arrow pointing towards the pump inlet.
Can the 1700C15 check valve be supplied with Viton seat material. EPDM doesn't have very good compatibility with chlorine and doesn't provide satisfactory service life.
Hi, Don. Unfortunately, the 1700C15 is not available with Vition seals.
This check valve comes with either 1/2 lb or 2 lb springs. When would I need a 2 lb spring?
Most systems will only require a 1/2 lb spring. The 2 lb spring is required for situations with greater head or backflow pressure. An example would be solar panels mounted on an 8' high roof.
(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.
(5 out of 5 stars) Made it easy to install an inline chlorinator
Reviewed By: Mark A. from Stafford, VA ()
Pros: Easy to install, sturdly built
Cons: Unsure about corrosion resistance to chlorine
I used this as a check valve to protect my pool heater from an in line chlorinator. It's not the one recommended by the manufacturer of the chlorinator(Rainbow), but theirs wasn't built with the screw on unions. This made it really easy to install the chlorinator, and will make any future repairs equally easy.