I have one of those in-line water filter installed on my ref and I was having a hard time trying to find the damn replacement filter for it. Turned out that Whirlpool replaced that model with a newer one but its still compatible with the old model. So the new replacement filter is WHKF-R-PLUS.
It should fit Whirlpool WHCF-IMTOS, Whirlpool WHCF-IMPLUS, and Whirlpool WHKF-IMPLUS Water Filter Systems.
thank you, zeenanoko! this was really helpful. this filtration system was built into my house before i bought it and i’ve been having a hard time replacing the filters, but did not want to install a new system.
You are welcome! I’m just glad that my post helped you out.
Thanks for the feedback!