I can't remember the exact settings but have you tried adjusting the Voxel Scale, Influence Scale and Droplet Scale in the Particle Fluid Surface node?
Try bumping up the Voxel Scale to 0.9 if you use the default 0.75 (if I'm not mistaken).
Worst case scenario which will change the overall appearance of the fluid especially when it pours, play around with both Influence Scale and Droplet Scale (remember to keep Droplet Scale to be smaller than Influence Scale!)