matrophy Posted September 6, 2020 Report Share Posted September 6, 2020 (edited) Definitely a spa rookie. Went to start up the Sundance Cameo that came with the house that we have only used once about 18 months ago. Everything ran OK except for the waterfall that burped up some water and some black gunk and then stopped flowing. After filling and setting the automatic running features and checking that all of the pumps and jets were working OK, I left it to run overnight hopefully for the filter to catch some of the small pieces of dirt, etc that we didn't get out before we filled it. This morning the water level was down about 6" and there was a puddle of water underneath. I removed the front cover and see water draining from this hose. It looks like an air vent but I am pretty sure it's not supposed to drain through this. I'm wondering of there is a blockage or an air lock that caused water to back up through this hose AND if this might be related to whatever is preventing the waterfall from flowing. Edited September 6, 2020 by matrophy Wrong model Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted September 7, 2020 Report Share Posted September 7, 2020 Looks to be the hose for a UV/Ozone injection. The white part joined to the 3/4" hose that the line comes off of is a Mazzi injector. Usually a one way check valve where the point of the red arrow is in the photo you posted. See below.... mazzi injector to ozone line to check valve... I would say plug it if you don't have ozone installed Quote Link to comment Share on other sites More sharing options...
matrophy Posted September 7, 2020 Author Report Share Posted September 7, 2020 We do have ozone injection so I'll take a look and see if there is something that looks like it came loose. Thanks! Quote Link to comment Share on other sites More sharing options...
matrophy Posted September 7, 2020 Author Report Share Posted September 7, 2020 4 hours ago, CanadianSpaTech said: Looks to be the hose for a UV/Ozone injection. The white part joined to the 3/4" hose that the line comes off of is a Mazzi injector. Usually a one way check valve where the point of the red arrow is in the photo you posted. See below.... mazzi injector to ozone line to check valve... I would say plug it if you don't have ozone installed Check valve from ozone was broken in half. Is there anything special about these check valves or will any check valve with the correct hose fittings work? Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted September 7, 2020 Report Share Posted September 7, 2020 Just make sure it's one way and installed in the right direction Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted September 8, 2020 Report Share Posted September 8, 2020 The waterfall blockage could be an issue if it was plumbed on the heater return line. You'll want to figure that out. I would recommend you purge with Ahh-Some spa purge. If the ozone is old it probably doesn't work, you might want to check that and consider a new one. 1 Quote Link to comment Share on other sites More sharing options...
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