Hi, Matthew. You can use this SM-20-A0 as a replacement. However, it does not have the pre-plumbed connections which connect directly to the filter.  
 Reply

We would recommend to take one more step and get the filter model so we can make sure and confirm the compatible valve model for your unit. If you cannot locate that filter model you can always email us images at upload@inyopools.com so we can further review and advise. 
 Reply

Yes, this valve does have a port on the underside of it. 
 Reply