In a hot tub, as the water comes through the pipes, it has a degree of force. This force is caused by the action of the pump, which puts energy into the circulating system and forces the water through the pipes. When the pump is off, there still may be water in the pipes, but there is no force. The degree of force in the system when the pump is on can be gauged in several ways, such as by putting your hand in front of a “jet.” Another way would be to have a device to measure the amount of force that the water exerts against the walls of the pipes as it circulates. Such a device might yield a numerical measurement of the force, or pressure, of the water within the pipes.

I would not recommend changing BP medications every 3-4 months just to prevent the onset of potential side-effects, but it certainly makes sense to reassess how you are doing on a BP med after a certain interval (usually after a few weeks, and then every few months or more often if the dose still needs to be refined or if there is concern about potential side-effects).

Speaking of BP meds that effect potassium, my potassium is usually around 3.3 which is below the threshold. My doctor thinks this is due to the diuretic chlorthalidone and recommends a supplement like KLOR. I also take lisinopril and amlodipine. I have no symptoms of hypoglycemia and have put off taking the supplement. Perhaps switching to a potassium sparing diuretic would be the way to go, but I tolerate my current meds very well. I am a very active 75 year old man. Thank you so much for your good work with this blog.
Eat beets: Rich in vitamins and minerals, this root vegetable can help decrease blood pressure. A 2010 study in hypertension found that drinking only 250ml of juice was needed have a positive effect on blood pressure. Many of the participants saw lowered blood pressure within 24 hours. Another study from 2012 saw that beetroot juice helped lower systolic blood pressure.