So ABS has never given you grief? No unusual amounts of algae? Slow growth? Deaths? And all that?
As long as you are comfortable with it, 'carry on my wayward son', just wanted to give you a heads up.
The spa flex may have saved my build as there was a time when the wife said ' No way, that is too loud', and I agreed. I changed a bunch of stuff and all is now good.
Use as much of it as you can between every fitting, even your closed loop.
It's amazing how much noise it takes away.
The biggest difference I found was to leave as much room as I could between the pump and the first mounting location.
You'll get the vibration sounds transmitting through your pumbing if you clamp anything rigid to anything solid, like a pipe to a stand.
In my case, I had a piece of Spa clamped to the wall behind our stand and it was humming downstairs. I had to re-position the spa after I un-clamped it to stop issues with the tank, but I got rid of the nasty hum by our front door.
Also, I have re-done my sump plumbing 3 times already with testing, so, because your tank is empty, you may want to fill it and test everything like I did, then think about it for a day or 3.
I am glad I haven't rushed it.
Keep up the posts and pics
