Do you have a link to what you are using? I can’t seem to find anything I can connect to 1 1/4 inch pvc pipeI plumbed a inch and a half return. I ended up using 1 1/2 inch to 3/4 wye. Basically splits the 1 1/2 to dual 3/4 outputs to use 3/4 nozzles. You might look into splitting it like that as well.