Aquacal Heatwave SQ Heat Pump Leak

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OolDad

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Oct 28, 2022
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I've got a leak from the water outlet inside my heat pump. It's not broken PVC as far as I can tell, just the seal where the PVC pipe meets the tank where the water is heated. What can I use to seal the connection from the pipe to the tank that will actually work?
I've seen older threads with caked on silicone that looked pretty bad. Some said epoxy wouldn't hold well on an outlet pipe. What's the right fix, and are there specific products you would recommend?
 

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It looks like there is a union connecting the pipe to the heat exchanger and probably an O-ring in the union that is leaking.

The right fix is to disassemble the heat pump to disconnect the pipe and fix the leaking connection but that is a lot of work.

You can slather something on the area and see if it holds.

Have you called Aquacal to ask them or looked at a parts diagram?
 
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ajw22 said:
It looks like there is a union connecting the pipe to the heat exchanger and probably an O-ring in the union that is leaking.

The right fix is to disassemble the heat pump to disconnect the pipe and fix the leaking connection but that is a lot of work.

You can slather something on the area and see if it holds.

Have you called Aquacal to ask them or looked at a parts diagram?
Click to expand...
As best I can tell there is no separate union on top, it's all part of a molded cover. Taking that apart looks like it would be pretty awful, and I'd likely have to remove the refrigerant?


If slathering something on is all I can do, what would you recommend?
 
Last edited:
Looks like PVC and ABS. I would use Plast-aid,,,

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ajw22 said:
It looks like there is a union connecting the pipe to the heat exchanger and probably an O-ring in the union that is leaking.

The right fix is to disassemble the heat pump to disconnect the pipe and fix the leaking connection but that is a lot of work.

You can slather something on the area and see if it holds.

Have you called Aquacal to ask them or looked at a parts diagram?
Click to expand...
Quick gut check before I make a mess... Am I right that I would have to remove the refrigerant to do it the right way?
 
OolDad said:
Quick gut check before I make a mess... Am I right that I would have to remove the refrigerant to do it the right way?
Click to expand...
Probably. Depends what access you have to all four sides and if you can remove the outer shell to reach in to where that pipe connects.

I don't have a good mental picture of exactly how the pieces fit together.
 
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JamesW said:
Is it 1.5" pipe?



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Click to expand...
2", but I don't think this will work. The leak is below the cover. Even if I cut the pipe where I could access it, I wouldn't have access to seal the leak. Interesting stuff though, thanks!
 
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