I'm piping in the water pipes for my Hayward natural gas heater. The diagrams in the installation manual show the inlet and outlet pipes coming out the side of the heater and doing a 90 degree turn downwards. But, it never actually says that it's necessary for them to point downwards. Is there any reason why I can't have them come out the side of the heater and do a 90 degree turn upwards instead? I wasn't sure if they have it going downwards to prevent water from reentering the heater after the pump was shutoff?
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