Part # 170020
Dimensions 21" L x 21" W x 13.5" D
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
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.
Is it possible to purchase just the insert part of this as a replacement?
There is no replacement part for that and you would need to replace the whole unit.
(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.