OK, back with some results. The only changes were to add a ball valve to the outlet and screwcap to the 3/4 inlet. No leaks and everything is glued and taped except the inlet stems, but they are completely submerged.
The first thing to mention is that I left the tub out overnight, and so today the water was much warmer than yesterday - not sure if that impacts anything or not.
Replacing the cap with a tape wrapped screw cap removed all microbubbles on the 3/4 intake assembly.
The 1" outlet assembly produced good flow, was a little noisy.
By reducing the outlet to about 75% open with the valve the flow was roughly the same but very quiet.
With the pump off of course, closing the outlet valve and unscrewing the inlet cap meant that there was no siphon and the drain plug worked like a champ.
Switching to the 1" inlet assembly produced more flow, and the same amount of noise. Again closing the valve to about 75% open greatly reduced the noise with barely any loss of flow from wide open. I ran it this way for about an hour and the pump was not any hotter than with the valve wide open - warm, but not hot at all.
The 1" inlet did not have a screw cap but didn't produce any bubbles - could it have been the water temp the whole time? I'll get this screwed in anyway but that's interesting.
I keep talking about the pump being noisy. I was sitting on some steps next to it while working and when I got up to have another margarita I noticed that I couldn't hear it at all from about 3 feet in front of the tub - guessing that this will be nothing more than a hum once in a room and functional.
My wife wants to know why she keeps finding pvc shavings in our bed.
jp
The first thing to mention is that I left the tub out overnight, and so today the water was much warmer than yesterday - not sure if that impacts anything or not.
Replacing the cap with a tape wrapped screw cap removed all microbubbles on the 3/4 intake assembly.
The 1" outlet assembly produced good flow, was a little noisy.
By reducing the outlet to about 75% open with the valve the flow was roughly the same but very quiet.
With the pump off of course, closing the outlet valve and unscrewing the inlet cap meant that there was no siphon and the drain plug worked like a champ.
Switching to the 1" inlet assembly produced more flow, and the same amount of noise. Again closing the valve to about 75% open greatly reduced the noise with barely any loss of flow from wide open. I ran it this way for about an hour and the pump was not any hotter than with the valve wide open - warm, but not hot at all.
The 1" inlet did not have a screw cap but didn't produce any bubbles - could it have been the water temp the whole time? I'll get this screwed in anyway but that's interesting.
I keep talking about the pump being noisy. I was sitting on some steps next to it while working and when I got up to have another margarita I noticed that I couldn't hear it at all from about 3 feet in front of the tub - guessing that this will be nothing more than a hum once in a room and functional.
My wife wants to know why she keeps finding pvc shavings in our bed.
jp
