Mx495 Posted February 12, 2022 Report Share Posted February 12, 2022 Have an older hot tub. Put new control panel and pumps in about 8 years ago. Moved to new house. Used it only a few times after move being so busy. Sat a lot. Filled after being winterized. Ran fine on circulation and low speed. Turned on high speed and pump seal blew out of the 2 speed pump. Installed new pump. Loosened joints after fill to bleed. Turned it on, same thing. As soon as I turned on high speed blew the seal. Got a new seal and installed it in the newer pump. Made sure all the air was out of the lines. No big air leaks that I can see. Tub has no in line shut off valves. I’m at a loss. Don’t want to buy another pump for the same thing to happen. Thanks for any ideas or advice. Quote Link to comment Share on other sites More sharing options...
jtx54 Posted May 18, 2022 Report Share Posted May 18, 2022 Mx495, Were you able to determine what was causing this? I recently replaced a jet pump on my spa and I'm having the same issue where the seal blows out the back of the wet end. Usually it survives the first start, but if I turn off the pump and turn it on a second time, there is a clicking sound followed by water gushing out of the back of the wet end. I've tried a few different things and I'm still having the same problem with brand new pump and seal. Quote Link to comment Share on other sites More sharing options...
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