Thank you for the forum, new to this site.
I have a pool and spa built in the 80's. the spa runs from the pool pump, you just switch the valves to divert the flow from the pool to the spa. when we do this the spa does not have much force in the jets. or put another way the water does not come out of the jets very strong. my quetion is , two of the jets have a a different end, they have smaller hole for the water to come out. i have attached pictures of each and an overal picture of the spa. my question is can i switch out the larger jet ends and replace them with the small openings making the water come out with more force?
one other note, there is an air pump attached to the line, you can turn on an off for bubbles. i was told at one time to be careful what i did to the spa because water may backup that air pipe if not handled correctly.
your help would be apprecaited?