Will need to replace the filter cannister on a older model leisure Bay tub. The T handle valve failed to open even though the handle was drawn out and the pressure blew the top into orbit!!!

Im waiting to get make and model number from the cannister unit, I know this may be the wrong topic as well.

This is a great site!!

If it's an older Leisure Bay spa, then it's probably a rainbow filter cannister like this:

http://spapartsnet.com/Filters/RTL25-50_445_1_1.html

No fun to replace, but you gotta do what you gotta do....