I'm trying to find a two way valve to fit to the 5/8" line on my Rena XP3 filter. One the valve is in one position, I want the filter to get it's source water directly from the aquarium. When it in the second position I want the source water to come from a bucket. I want to do the same thing on the output line. One position feed back to the aquarium, the second position to a drain line. I've not had any luck finding such a valve. Can someone suggest a source? I'm located in Canada (Calgary, Alberta) but can order online from anywhere if needed. Thanks!