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Only the manufacturer of the Onga 443 MAY be able to tell you how old your pump is. You would have to provide the serial number for the pump, in hopes the company has manufacturing records in its archives. The company archives should probably have photographs of the Onga 443.
I refer you to Pentair, the oompany which owns the Onga brand name and manufactures the pumps. See the Pentair Contact Us page to find the email address for Customer Service: http://www.onga.com.au/contact-us/
The email addresses there seem to be for sales. I would still use the email address for the country where you reside and ask that your message be forwarded to Customer Service.
Open app store on your iPad Tap on the featured button, scroll to bottom of page >tap on Apple ID Sign in with your Apple ID and password View account>enter password Manage subscriptions Tap on the SMH/AGE for iPad subscription and turn off auto-renewal
This could be your problem. Make sure it isn't running dry.
D.R.O.P (Dry Running Over-Temperature Protection)
The Onga SMH series of pumps (excluding the SMH35) are fitted with the internationally patented D.R.O.P system which protects the hydraulic parts from possible damage that can be caused by overheating of the liquid inside
the pump casing. The overheating can be the result of external causes (outside the pump) or occurs because the pump stops priming and as water is pumped out the
pump runs dry.The D.R.O.P system is reset using the switch located on the condenser.
If you have access to an amp meter, measure the curring when pumping full load, and be sure it is less than the full load amperage listed on motor.
The lateral(s) are damaged and allowing sand thru and back to the pool. I have never dealt with that specific brand to know if the laterals come as one assembly or individual pieces. You'll need to contact the dealer you got the unit from or check online at http://www.onga.com.au/dealerlocator for someone in your area.
Your Onga Pool pump was running dry causing the impeller to melt down and stick to the pump case. You have to remove the impeller, and the only way to take it off by using the heat gun to melt the stucked plastic impeller. Or by forcing it off slowly, cutting the impeller using hacksaw, taking care of the mechanical seal and the motor shaft not to bend it. Afterwhich you can replace the impeller, and assemble the Onga pump/motor. Then, you can install the Onga pump back to its location. Just send you e-mail for further assistance. God bless you.
It is leaking due to a defective mechanical seal. It needs to be replaced. To replace it, is to take the pumpcase off by taking off the bolts that hold it. Then, take the impeller off to take the mechanical seal behind it. Put the replacement in, and reassemble the pump. Just get in touch with us by e-mail to get more assistance.